Add LevelDb's Java interface

Summary:
See the wiki below
https://our.intern.facebook.com/intern/wiki/index.php/Database/leveldb/Java

Test Plan: compile test

Reviewers: dhruba

Reviewed By: dhruba

Differential Revision: https://reviews.facebook.net/D5919

java/README

+###############################################################################
+leveldb - A Java port of LevelDB (https://github.com/dain/leveldb)
+
+This is a Java port of LevelDB. We only need the interface part, so the
+implementation part is not checked in.
+
+This is based on commit: c8d074b3d95f30612e573bba689b85749031d639 from
+https://github.com/dain/leveldb.git
+
+###############################################################################
+
+leveldbjni - JNI Wrapper for LevelDB (https://github.com/fusesource/leveldbjni)
+
+Provide LevelDB implementation by using JNI wrapper. It is written using HawtJNI
+which is JNI code generatori (http://hawtjni.fusesource.org/).
+
+This is based on commmit: 8bac93ec1bcc97a098a1eaac265ea04b766ef574 from
+https://github.com/fusesource/leveldbjni.git
+
+###############################################################################

java/leveldb/.gitignore

+target/
+/var
+pom.xml.versionsBackup
+test-output/
+/atlassian-ide-plugin.x
+.idea
+.*.swp
+.*.swo
+leveldb-c
+*~
+*.swp
+.idea
+.idea/*
+*.iml
+*.ipr
+*.iws
+.DS_Store
+.scala_dependencies
+.project
+.classpath
+.settings
+eclipse-classes

java/leveldb/leveldb-api/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.iq80.leveldb</groupId>
+        <artifactId>leveldb-project</artifactId>
+        <version>0.4-SNAPSHOT</version>
+    </parent>
+
+    <groupId>org.iq80.leveldb</groupId>
+    <artifactId>leveldb-api</artifactId>
+    <version>0.4-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>${project.artifactId}</name>
+    <description>High level Java API for LevelDB</description>
+
+</project>

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/CompressionType.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+public enum CompressionType
+{
+    NONE(0x00),
+    SNAPPY(0x01);
+
+    public static CompressionType getCompressionTypeByPersistentId(int persistentId) {
+        for (CompressionType compressionType : CompressionType.values()) {
+            if (compressionType.persistentId == persistentId) {
+                return compressionType;
+            }
+        }
+        throw new IllegalArgumentException("Unknown persistentId " + persistentId);
+    }
+
+    private final int persistentId;
+
+    CompressionType(int persistentId)
+    {
+        this.persistentId = persistentId;
+    }
+
+    public int persistentId()
+    {
+        return persistentId;
+    }
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/DB.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+import java.io.Closeable;
+import java.util.Map;
+
+/**
+ * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
+ */
+public interface DB extends Iterable<Map.Entry<byte[], byte[]>>, Closeable {
+
+    public byte[] get(byte[] key) throws DBException;
+    public byte[] get(byte[] key, ReadOptions options) throws DBException;
+
+    public DBIterator iterator();
+    public DBIterator iterator(ReadOptions options);
+
+    public void put(byte[] key, byte[] value) throws DBException;
+    public void delete(byte[] key) throws DBException;
+    public void write(WriteBatch updates) throws DBException;
+
+    public WriteBatch createWriteBatch();
+
+    /**
+     * @return null if options.isSnapshot()==false otherwise returns a snapshot
+     *         of the DB after this operation.
+     */
+    public Snapshot put(byte[] key, byte[] value, WriteOptions options) throws DBException;
+
+    /**
+     * @return null if options.isSnapshot()==false otherwise returns a snapshot
+     *         of the DB after this operation.
+     */
+    public Snapshot delete(byte[] key, WriteOptions options) throws DBException;
+
+    /**
+     * @return null if options.isSnapshot()==false otherwise returns a snapshot
+     *         of the DB after this operation.
+     */
+    public Snapshot write(WriteBatch updates, WriteOptions options) throws DBException;
+
+    public Snapshot getSnapshot();
+
+    public long[] getApproximateSizes(Range ... ranges);
+    public String getProperty(String name);
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/DBComparator.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+import java.util.Comparator;
+
+/**
+ * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
+ */
+public interface DBComparator extends Comparator<byte[]>{
+
+    public String name();
+
+    /**
+     * If <code>start < limit</code>, returns a short key in [start,limit).
+     * Simple comparator implementations should return start unchanged,
+     *
+     * @param start
+     * @param limit
+     * @return
+     */
+    byte[] findShortestSeparator(byte[] start, byte[] limit);
+
+    /**
+     * returns a 'short key' where the 'short key' >= key.
+     * Simple comparator implementations should return key unchanged,
+     *
+     * @param key
+     */
+    byte[] findShortSuccessor(byte[] key);
+
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/DBException.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+/**
+ * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
+ */
+public class DBException extends RuntimeException {
+    public DBException() {
+    }
+
+    public DBException(String s) {
+        super(s);
+    }
+
+    public DBException(String s, Throwable throwable) {
+        super(s, throwable);
+    }
+
+    public DBException(Throwable throwable) {
+        super(throwable);
+    }
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/DBFactory.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+import java.io.File;
+import java.io.IOException;
+
+/**
+ * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
+ */
+public interface DBFactory {
+
+    public DB open(File path, Options options) throws IOException;
+
+    public void destroy(File path, Options options) throws IOException;
+
+    public void repair(File path, Options options) throws IOException;
+
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/DBIterator.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+import java.io.Closeable;
+import java.util.Iterator;
+import java.util.Map;
+
+/**
+ * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
+ */
+public interface DBIterator extends Iterator<Map.Entry<byte[], byte[]>>, Closeable {
+
+    /**
+     * Repositions the iterator so the key of the next BlockElement
+     * returned greater than or equal to the specified targetKey.
+     */
+    public void seek(byte[] key);
+
+    /**
+     * Repositions the iterator so is is at the beginning of the Database.
+     */
+    public void seekToFirst();
+
+    /**
+     * Returns the next element in the iteration, without advancing the iteration.
+     */
+    public Map.Entry<byte[], byte[]> peekNext();
+
+    /**
+     * @return true if there is a previous entry in the iteration.
+     */
+    boolean hasPrev();
+
+    /**
+     * @return the previous element in the iteration and rewinds the iteration.
+     */
+    Map.Entry<byte[], byte[]> prev();
+
+    /**
+     * @return the previous element in the iteration, without rewinding the iteration.
+     */
+    public Map.Entry<byte[], byte[]> peekPrev();
+
+    /**
+     * Repositions the iterator so it is at the end of of the Database.
+     */
+    public void seekToLast();
+
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/Logger.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+/**
+ * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
+ */
+public interface Logger {
+
+    public void log(String message);
+
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/Options.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+public class Options {
+
+    private boolean createIfMissing = true;
+    private boolean errorIfExists;
+    private int writeBufferSize = 4 << 20;
+
+    private int maxOpenFiles = 1000;
+
+    private int blockRestartInterval = 16;
+    private int blockSize = 4 * 1024;
+    private CompressionType compressionType = CompressionType.SNAPPY;
+    private boolean verifyChecksums = true;
+    private boolean paranoidChecks = false;
+    private DBComparator comparator;
+    private Logger logger = null;
+    private long cacheSize;
+
+    static void checkArgNotNull(Object value, String name) {
+        if(value==null) {
+            throw new IllegalArgumentException("The "+name+" argument cannot be null");
+        }
+    }
+
+    public boolean createIfMissing()
+    {
+        return createIfMissing;
+    }
+
+    public Options createIfMissing(boolean createIfMissing)
+    {
+        this.createIfMissing = createIfMissing;
+        return this;
+    }
+
+    public boolean errorIfExists()
+    {
+        return errorIfExists;
+    }
+
+    public Options errorIfExists(boolean errorIfExists)
+    {
+        this.errorIfExists = errorIfExists;
+        return this;
+    }
+
+    public int writeBufferSize()
+    {
+        return writeBufferSize;
+    }
+
+    public Options writeBufferSize(int writeBufferSize)
+    {
+        this.writeBufferSize = writeBufferSize;
+        return this;
+    }
+
+    public int maxOpenFiles()
+    {
+        return maxOpenFiles;
+    }
+
+    public Options maxOpenFiles(int maxOpenFiles)
+    {
+        this.maxOpenFiles = maxOpenFiles;
+        return this;
+    }
+
+    public int blockRestartInterval()
+    {
+        return blockRestartInterval;
+    }
+
+    public Options blockRestartInterval(int blockRestartInterval)
+    {
+        this.blockRestartInterval = blockRestartInterval;
+        return this;
+    }
+
+    public int blockSize()
+    {
+        return blockSize;
+    }
+
+    public Options blockSize(int blockSize)
+    {
+        this.blockSize = blockSize;
+        return this;
+    }
+
+    public CompressionType compressionType()
+    {
+        return compressionType;
+    }
+
+    public Options compressionType(CompressionType compressionType)
+    {
+        checkArgNotNull(compressionType, "compressionType");
+        this.compressionType = compressionType;
+        return this;
+    }
+
+    public boolean verifyChecksums()
+    {
+        return verifyChecksums;
+    }
+
+    public Options verifyChecksums(boolean verifyChecksums)
+    {
+        this.verifyChecksums = verifyChecksums;
+        return this;
+    }
+
+
+    public long cacheSize() {
+        return cacheSize;
+    }
+
+    public Options cacheSize(long cacheSize) {
+        this.cacheSize = cacheSize;
+        return this;
+    }
+
+    public DBComparator comparator() {
+        return comparator;
+    }
+
+    public Options comparator(DBComparator comparator) {
+        this.comparator = comparator;
+        return this;
+    }
+
+    public Logger logger() {
+        return logger;
+    }
+
+    public Options logger(Logger logger) {
+        this.logger = logger;
+        return this;
+    }
+
+    public boolean paranoidChecks() {
+        return paranoidChecks;
+    }
+
+    public Options paranoidChecks(boolean paranoidChecks) {
+        this.paranoidChecks = paranoidChecks;
+        return this;
+    }
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/Range.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+/**
+ * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
+ */
+public class Range {
+
+    final private byte[] start;
+    final private byte[] limit;
+
+    public byte[] limit() {
+        return limit;
+    }
+
+    public byte[] start() {
+        return start;
+    }
+
+    public Range(byte[] start, byte[] limit) {
+        Options.checkArgNotNull(start, "start");
+        Options.checkArgNotNull(limit, "limit");
+        this.limit = limit;
+        this.start = start;
+    }
+
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/ReadOptions.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+public class ReadOptions
+{
+    private boolean verifyChecksums = false;
+    private boolean fillCache = true;
+    private Snapshot snapshot;
+
+    public Snapshot snapshot()
+    {
+        return snapshot;
+    }
+
+    public ReadOptions snapshot(Snapshot snapshot)
+    {
+        this.snapshot = snapshot;
+        return this;
+    }
+
+    public boolean fillCache() {
+        return fillCache;
+    }
+
+    public ReadOptions fillCache(boolean fillCache) {
+        this.fillCache = fillCache;
+        return this;
+    }
+
+    public boolean verifyChecksums() {
+        return verifyChecksums;
+    }
+
+    public ReadOptions verifyChecksums(boolean verifyChecksums) {
+        this.verifyChecksums = verifyChecksums;
+        return this;
+    }
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/Snapshot.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+import java.io.Closeable;
+
+public interface Snapshot extends Closeable {
+
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/WriteBatch.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+import java.io.Closeable;
+
+/**
+ * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
+ */
+public interface WriteBatch extends Closeable {
+
+    public WriteBatch put(byte[] key, byte[] value);
+    public WriteBatch delete(byte[] key);
+}

java/leveldb/leveldb-api/src/main/java/org/iq80/leveldb/WriteOptions.java

+/**
+ * Copyright (C) 2011 the original author or authors.
+ * See the notice.md file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.iq80.leveldb;
+
+public class WriteOptions
+{
+    private boolean sync;
+    private boolean snapshot;
+
+
+    public boolean sync()
+    {
+        return sync;
+    }
+
+    public WriteOptions sync(boolean sync)
+    {
+        this.sync = sync;
+        return this;
+    }
+
+    public boolean snapshot() {
+        return snapshot;
+    }
+
+    public WriteOptions snapshot(boolean snapshot) {
+        this.snapshot = snapshot;
+        return this;
+    }
+
+}

java/leveldb/license-header.txt

+Copyright (C) 2011 the original author or authors.
+See the notice.md file distributed with this work for additional
+information regarding copyright ownership.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

java/leveldb/license.txt

+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+

java/leveldb/notice.md

+LevelDB Copyright Notices 
+=========================
+
+* Copyright 2011 Dain Sundstrom <dain@iq80.com>
+* Copyright 2011 FuseSource Corp. http://fusesource.com

java/leveldb/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.iq80.leveldb</groupId>
+    <artifactId>leveldb-project</artifactId>
+    <version>0.4-SNAPSHOT</version>
+    <packaging>pom</packaging>
+
+    <name>${project.artifactId}</name>
+
+    <description>Port of LevelDB to Java</description>
+    <url>http://github.com/dain/leveldb</url>
+
+    <modules>
+        <module>leveldb-api</module>
+        <module>leveldb</module>
+    </modules>
+
+    <inceptionYear>2011</inceptionYear>
+
+    <licenses>
+        <license>
+            <name>Apache License 2.0</name>
+            <url>http://www.apache.org/licenses/LICENSE-2.0.html</url>
+            <distribution>repo</distribution>
+        </license>
+    </licenses>
+
+    <developers>
+        <developer>
+            <id>dain</id>
+            <name>Dain Sundstrom</name>
+            <email>dain@iq80.com</email>
+        </developer>
+        <developer>
+            <id>chirino</id>
+            <name>Hiram Chirino</name>
+            <email>hiram@hiramchirino.com</email>
+            <url>http://hiramchirino.com</url>
+            <timezone>-5</timezone>
+        </developer>
+    </developers>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <sonatypeOssDistMgmtSnapshotsUrl>https://oss.sonatype.org/content/repositories/snapshots/</sonatypeOssDistMgmtSnapshotsUrl>
+    </properties>
+
+    <scm>
+        <connection>scm:git:git://github.com/dain/leveldb.git</connection>
+        <developerConnection>scm:git:git@github.com:dain/leveldb.git</developerConnection>
+        <url>http://github.com/dain/leveldb/tree/master</url>
+    </scm>
+
+    <prerequisites>
+        <maven>3.0</maven>
+    </prerequisites>
+
+    <repositories>
+        <repository>
+            <id>sonatype-nexus-snapshots</id>
+            <name>Sonatype Nexus Snapshots</name>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+            <snapshots>
+                <enabled>true</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+
+    <distributionManagement>
+        <snapshotRepository>
+            <id>sonatype-nexus-snapshots</id>
+            <name>Sonatype Nexus Snapshots</name>
+            <url>${sonatypeOssDistMgmtSnapshotsUrl}</url>
+        </snapshotRepository>
+        <repository>
+            <id>sonatype-nexus-staging</id>
+            <name>Nexus Release Repository</name>
+            <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+        </repository>
+    </distributionManagement>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-enforcer-plugin</artifactId>
+                <version>1.0</version>
+                <executions>
+                    <execution>
+                        <id>enforce-versions</id>
+                        <goals>
+                            <goal>enforce</goal>
+                        </goals>
+                        <configuration>
+                            <rules>
+                                <requireMavenVersion>
+                                    <version>3.0.0</version>
+                                </requireMavenVersion>
+                                <requireJavaVersion>
+                                    <version>1.6</version>
+                                </requireJavaVersion>
+                            </rules>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+            </plugin>
+        </plugins>
+
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-surefire-plugin</artifactId>
+                    <version>2.8.1</version>
+                </plugin>
+
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-source-plugin</artifactId>
+                    <version>2.1.2</version>
+                    <configuration>
+                        <attach>true</attach>
+                    </configuration>
+                    <executions>
+                        <execution>
+                            <id>create-source-jar</id>
+                            <goals>
+                                <goal>jar-no-fork</goal>
+                            </goals>
+                        </execution>
+                    </executions>
+                </plugin>
+
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>2.3.2</version>
+                    <configuration>
+                        <source>1.6</source>
+                        <target>1.6</target>
+                    </configuration>
+                </plugin>
+
+                <plugin>
+                    <groupId>org.codehaus.mojo</groupId>
+                    <artifactId>findbugs-maven-plugin</artifactId>
+                    <version>2.3.2</version>
+                    <configuration>
+                        <findbugsXmlOutput>true</findbugsXmlOutput>
+                        <findbugsXmlWithMessages>true</findbugsXmlWithMessages>
+                        <xmlOutput>true</xmlOutput>
+                    </configuration>
+                </plugin>
+
+                <plugin>
+                    <groupId>org.codehaus.mojo</groupId>
+                    <artifactId>cobertura-maven-plugin</artifactId>
+                    <version>2.4</version>
+                    <configuration>
+                        <formats>
+                            <format>xml</format>
+                        </formats>
+                    </configuration>
+                </plugin>
+
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-install-plugin</artifactId>
+                    <version>2.3.1</version>
+                </plugin>
+
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-resources-plugin</artifactId>
+                    <version>2.4.3</version>
+                </plugin>
+
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-deploy-plugin</artifactId>
+                    <version>2.5</version>
+                </plugin>
+
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-javadoc-plugin</artifactId>
+                    <version>2.7</version>
+                    <configuration>
+                        <docletArtifact>
+                            <groupId>com.google.doclava</groupId>
+                            <artifactId>doclava</artifactId>
+                            <version>1.0.3</version>
+                        </docletArtifact>
+                        <doclet>com.google.doclava.Doclava</doclet>
+                        <!--
+                          | bootclasspath required by Sun's JVM
+                        -->
+                        <bootclasspath>${sun.boot.class.path}</bootclasspath>
+                        <additionalparam>
+                            -quiet
+                            <!-- The federation options cause an NPE when it builds the project pom -->
+                            <!--
+                            -federate JDK http://download.oracle.com/javase/6/docs/api/index.html?
+                            -federationxml JDK http://doclava.googlecode.com/svn/static/api/openjdk-6.xml
+                            -federate Guice http://google-guice.googlecode.com/svn/trunk/javadoc/
+                            -->
+                            -hdf project.name "${project.name}"
+                            -d ${project.build.directory}/apidocs
+                        </additionalparam>
+                        <useStandardDocletOptions>false</useStandardDocletOptions>
+                        <!--
+                          | Apple's JVM sometimes requires more memory
+                        -->
+                        <additionalJOption>-J-Xmx1024m</additionalJOption>
+                    </configuration>
+                    <executions>
+                        <execution>
+                            <id>attach-javadocs</id>
+                            <goals>
+                                <goal>jar</goal>
+                            </goals>
+                        </execution>
+                    </executions>
+                </plugin>
+
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-release-plugin</artifactId>
+                    <version>2.2.1</version>
+                    <configuration>
+                        <mavenExecutorId>forked-path</mavenExecutorId>
+                        <useReleaseProfile>false</useReleaseProfile>
+                        <arguments>-Psonatype-oss-release</arguments>
+                        <pushChanges>false</pushChanges>
+                        <localCheckout>true</localCheckout>
+                        <tagNameFormat>@{project.version}</tagNameFormat>
+                    </configuration>
+                </plugin>
+
+                <!-- 
+                  Do a license check by running       : mvn license:check  
+                  Update the license check by running : mvn license:format  
+                -->
+                <plugin>
+                    <groupId>com.mycila.maven-license-plugin</groupId>
+                    <artifactId>maven-license-plugin</artifactId>
+                    <version>1.9.0</version>
+                    <configuration>
+                        <header>license-header.txt</header>
+                        <excludes>
+                            <exclude>**/README.txt</exclude>
+                            <exclude>**/config.properties</exclude>
+                            <exclude>**/log.properties</exclude>
+                        </excludes>
+                    </configuration>
+                </plugin>
+
+                <plugin>
+                  <groupId>org.apache.maven.plugins</groupId>
+                  <artifactId>maven-site-plugin</artifactId>
+                  <version>3.0</version>
+                  <executions>
+                   <execution>
+                     <id>attach-descriptor</id>
+                     <goals>
+                       <goal>attach-descriptor</goal>
+                     </goals>
+                   </execution>
+                 </executions>
+                 <configuration>
+                    <reportPlugins>
+                      <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-project-info-reports-plugin</artifactId>
+                        <version>2.4</version>
+                        <configuration>
+                          <dependencyDetailsEnabled>false</dependencyDetailsEnabled>
+                          <dependencyLocationsEnabled>false</dependencyLocationsEnabled>
+                        </configuration>
+                        <!-- simpler configuration without reportSets available for usual cases -->
+                        <reports>
+                          <report>index</report>
+                          <report>dependencies</report>
+                          <report>issue-tracking</report>
+                          <report>license</report>
+                          <report>mailing-list</report>
+                          <report>modules</report>
+                          <report>project-team</report>
+                          <report>plugin-management</report>
+                          <report>plugins</report>
+                          <report>scm</report>
+                        </reports>
+                      </plugin>
+
+                      <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-jxr-plugin</artifactId>
+                        <version>2.3</version>
+                        <configuration>
+                          <!-- <stylesheet>stylesheet.css</stylesheet> -->
+                          <inputEncoding>UTF-8</inputEncoding>
+                          <outputEncoding>UTF-8</outputEncoding>
+                          <linkJavadoc>true</linkJavadoc>
+                          <docTitle>${project.name} Source Xref (${project.version})</docTitle>
+                          <windowTitle>${project.name} Source Xref (${project.version})</windowTitle>
+                        </configuration>
+                      </plugin>
+                      
+                      <plugin>
+                          <groupId>org.apache.maven.plugins</groupId>
+                          <artifactId>maven-javadoc-plugin</artifactId>
+                          <version>2.7</version>
+                          <configuration>
+                              <docletArtifact>
+                                  <groupId>com.google.doclava</groupId>
+                                  <artifactId>doclava</artifactId>
+                                  <version>1.0.3</version>
+                              </docletArtifact>
+                              <doclet>com.google.doclava.Doclava</doclet>
+                              <!--
+                                | bootclasspath required by Sun's JVM
+                              -->
+                              <bootclasspath>${sun.boot.class.path}</bootclasspath>
+                              <additionalparam>
+                                  -quiet
+                                  <!-- The federation options cause an NPE when it builds the project pom -->
+                                  <!--
+                                  -federate JDK http://download.oracle.com/javase/6/docs/api/index.html?
+                                  -federationxml JDK http://doclava.googlecode.com/svn/static/api/openjdk-6.xml
+                                  -federate Guice http://google-guice.googlecode.com/svn/trunk/javadoc/
+                                  -->
+                                  -hdf project.name "${project.name}"
+                                  -d ${project.build.directory}/site/apidocs
+                              </additionalparam>
+                              <useStandardDocletOptions>false</useStandardDocletOptions>
+                              <!--
+                                | Apple's JVM sometimes requires more memory
+                              -->
+                              <additionalJOption>-J-Xmx1024m</additionalJOption>
+                          </configuration>
+                      </plugin>            
+                    </reportPlugins>
+                  </configuration>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
+
+    <profiles>
+        <profile>
+            <id>sonatype-oss-release</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-gpg-plugin</artifactId>
+                        <version>1.1</version>
+                        <executions>
+                            <execution>
+                                <id>sign-artifacts</id>
+                                <phase>verify</phase>
+                                <goals>
+                                    <goal>sign</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-javadoc-plugin</artifactId>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+</project>

java/leveldb/src/site/site.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright (C) 2011 the original author or authors.
+See the notice.md file distributed with this work for additional
+information regarding copyright ownership.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+<project name="${project.name}">
+  
+  <skin>
+    <groupId>com.googlecode.fluido-skin</groupId>
+    <artifactId>fluido-skin</artifactId>
+    <version>1.3</version>
+  </skin>
+
+  <!-- Enable if the project ever gets a logo.
+  <bannerLeft>
+    <name>${project.name}</name>
+    <src>http://github.com/dain/leveldb/tree/master/ ...... /project-logo.png</src>
+    <href>${project.url}</href>
+  </bannerLeft>  
+  -->
+  
+  <version position="left"/>
+  <body>
+    <menu ref="reports" inherit="bottom"/>
+    <menu ref="modules" inherit="bottom"/>
+  </body>
+  
+</project>