/*
 Copyright 2008-2013 Gephi
 Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
 Website : http://www.gephi.org

 This file is part of Gephi.

 DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 Copyright 2013 Gephi Consortium. All rights reserved.

 The contents of this file are subject to the terms of either the GNU
 General Public License Version 3 only ("GPL") or the Common
 Development and Distribution License("CDDL") (collectively, the
 "License"). You may not use this file except in compliance with the
 License. You can obtain a copy of the License at
 http://gephi.org/about/legal/license-notice/
 or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the
 specific language governing permissions and limitations under the
 License.  When distributing the software, include this License Header
 Notice in each file and include the License files at
 /cddl-1.0.txt and /gpl-3.0.txt. If applicable, add the following below the
 License Header, with the fields enclosed by brackets [] replaced by
 your own identifying information:
 "Portions Copyrighted [year] [name of copyright owner]"

 If you wish your version of this file to be governed by only the CDDL
 or only the GPL Version 3, indicate your decision by adding
 "[Contributor] elects to include this software in this distribution
 under the [CDDL or GPL Version 3] license." If you do not indicate a
 single choice of license, a recipient has the option to distribute
 your version of this file under either the CDDL, the GPL Version 3 or
 to extend the choice of license to its licensees as provided above.
 However, if you add GPL Version 3 code and therefore, elected the GPL
 Version 3 license, then the option applies only if the new code is
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 Contributor(s):

 Portions Copyrighted 2013 Gephi Consortium.
 */

package org.gephi.appearance;

import java.lang.ref.WeakReference;
import java.util.Collection;
import org.gephi.graph.api.Column;
import org.gephi.graph.api.Element;
import org.gephi.graph.api.Graph;
import org.gephi.graph.api.Index;

/**
 * @author mbastian
 */
public class AttributePartitionImpl extends PartitionImpl {

    protected final WeakReference<Column> column;

    public AttributePartitionImpl(Column column) {
        super();
        this.column = new WeakReference<>(column);
    }

    @Override
    public Object getValue(Element element, Graph graph) {
        return element.getAttribute(column.get(), graph.getView());
    }

    private Index<Element> getIndex(Graph graph) {
        return graph.getModel().getElementIndex(column.get().getTable(), graph.getView());
    }

    @Override
    public Collection getValues(Graph graph) {
        return getIndex(graph).values(column.get());
    }

    @Override
    public int getElementCount(Graph graph) {
        return getIndex(graph).countElements(column.get());
    }

    @Override
    public int count(Object value, Graph graph) {
        return getIndex(graph).count(column.get(), value);
    }

    @Override
    public float percentage(Object value, Graph graph) {
        Index<Element> index = getIndex(graph);
        int count = index.count(column.get(), value);
        return 100f * ((float) count / index.countElements(column.get()));
    }

    @Override
    public int size(Graph graph) {
        return getIndex(graph).countValues(column.get());
    }

    @Override
    public Column getColumn() {
        return column.get();
    }

    @Override
    public Class getValueType() {
        return getColumn().getTypeClass();
    }

    @Override
    public boolean isValid(Graph graph) {
        Column col = column.get();
        if (col != null && col.getIndex() != -1) {
            return true;
        }
        return false;
    }

    @Override
    public int getVersion(Graph graph) {
        if (isValid(graph)) {
            return getIndex(graph).getColumnIndex(column.get()).getVersion();
        }
        return 0;
    }

    @Override
    public int hashCode() {
        int hash = 3;
        hash = 23 * hash + (this.column != null ? this.column.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final AttributePartitionImpl other = (AttributePartitionImpl) obj;
        return this.column == other.column || (this.column != null && this.column.equals(other.column));
    }
}
