Consistent support for early placeholder resolution in properties locations

Issue: SPR-10502

spring-beans/src/main/java/org/springframework/beans/factory/xml/UtilNamespaceHandler.java

 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -200,6 +200,7 @@ public class UtilNamespaceHandler extends NamespaceHandlerSupport {
 
 			String location = element.getAttribute("location");
 			if (StringUtils.hasLength(location)) {
+				location = parserContext.getReaderContext().getEnvironment().resolvePlaceholders(location);
 				String[] locations = StringUtils.commaDelimitedListToStringArray(location);
 				builder.addPropertyValue("locations", locations);
 			}

spring-context/src/main/java/org/springframework/context/config/AbstractPropertyLoadingBeanDefinitionParser.java

 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@ import org.w3c.dom.Element;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
 import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
+import org.springframework.beans.factory.xml.ParserContext;
 import org.springframework.util.StringUtils;
 
 /**
@@ -39,9 +40,10 @@ abstract class AbstractPropertyLoadingBeanDefinitionParser extends AbstractSingl
 	}
 
 	@Override
-	protected void doParse(Element element, BeanDefinitionBuilder builder) {
+	protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
 		String location = element.getAttribute("location");
 		if (StringUtils.hasLength(location)) {
+			location = parserContext.getReaderContext().getEnvironment().resolvePlaceholders(location);
 			String[] locations = StringUtils.commaDelimitedListToStringArray(location);
 			builder.addPropertyValue("locations", locations);
 		}

spring-context/src/main/java/org/springframework/context/config/PropertyOverrideBeanDefinitionParser.java

 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import org.w3c.dom.Element;
 
 import org.springframework.beans.factory.config.PropertyOverrideConfigurer;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.xml.ParserContext;
 
 /**
  * Parser for the <context:property-override/> element.
@@ -36,8 +37,8 @@ class PropertyOverrideBeanDefinitionParser extends AbstractPropertyLoadingBeanDe
 	}
 
 	@Override
-	protected void doParse(Element element, BeanDefinitionBuilder builder) {
-		super.doParse(element, builder);
+	protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
+		super.doParse(element, parserContext, builder);
 
 		builder.addPropertyValue("ignoreInvalidKeys",
 				Boolean.valueOf(element.getAttribute("ignore-unresolvable")));

spring-context/src/main/java/org/springframework/context/config/PropertyPlaceholderBeanDefinitionParser.java

@@ -20,6 +20,7 @@ import org.w3c.dom.Element;
 
 import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.xml.ParserContext;
 import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
 import org.springframework.util.StringUtils;
 
@@ -54,8 +55,8 @@ class PropertyPlaceholderBeanDefinitionParser extends AbstractPropertyLoadingBea
 	}
 
 	@Override
-	protected void doParse(Element element, BeanDefinitionBuilder builder) {
-		super.doParse(element, builder);
+	protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
+		super.doParse(element, parserContext, builder);
 
 		builder.addPropertyValue("ignoreUnresolvablePlaceholders",
 				Boolean.valueOf(element.getAttribute("ignore-unresolvable")));

spring-context/src/test/java/org/springframework/context/config/ContextNamespaceHandlerTests.java

@@ -16,12 +16,14 @@
 
 package org.springframework.context.config;
 
+import java.io.FileNotFoundException;
 import java.util.Calendar;
 import java.util.Date;
 
 import org.junit.After;
 import org.junit.Test;
 
+import org.springframework.beans.FatalBeanException;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
 import org.springframework.context.support.GenericXmlApplicationContext;
@@ -89,6 +91,54 @@ public class ContextNamespaceHandlerTests {
 		assertEquals("maps", applicationContext.getBean("spam"));
 	}
 
+	@Test
+	public void propertyPlaceholderLocationWithSystemPropertyForOneLocation() throws Exception {
+		System.setProperty("properties",
+				"classpath*:/org/springframework/context/config/test-*.properties");
+		try {
+			ApplicationContext applicationContext = new ClassPathXmlApplicationContext(
+					"contextNamespaceHandlerTests-location-placeholder.xml", getClass());
+			assertEquals("bar", applicationContext.getBean("foo"));
+			assertEquals("foo", applicationContext.getBean("bar"));
+			assertEquals("maps", applicationContext.getBean("spam"));
+		}
+		finally {
+			System.clearProperty("properties");
+		}
+	}
+
+	@Test
+	public void propertyPlaceholderLocationWithSystemPropertyForMultipleLocations() throws Exception {
+		System.setProperty("properties",
+				"classpath*:/org/springframework/context/config/test-*.properties," +
+				"classpath*:/org/springframework/context/config/empty-*.properties," +
+				"classpath*:/org/springframework/context/config/missing-*.properties");
+		try {
+			ApplicationContext applicationContext = new ClassPathXmlApplicationContext(
+					"contextNamespaceHandlerTests-location-placeholder.xml", getClass());
+			assertEquals("bar", applicationContext.getBean("foo"));
+			assertEquals("foo", applicationContext.getBean("bar"));
+			assertEquals("maps", applicationContext.getBean("spam"));
+		}
+		finally {
+			System.clearProperty("properties");
+		}
+	}
+
+	@Test
+	public void propertyPlaceholderLocationWithSystemPropertyMissing() throws Exception {
+		try {
+			ApplicationContext applicationContext = new ClassPathXmlApplicationContext(
+					"contextNamespaceHandlerTests-location-placeholder.xml", getClass());
+			assertEquals("bar", applicationContext.getBean("foo"));
+			assertEquals("foo", applicationContext.getBean("bar"));
+			assertEquals("maps", applicationContext.getBean("spam"));
+		}
+		catch (FatalBeanException ex) {
+			assertTrue(ex.getRootCause() instanceof FileNotFoundException);
+		}
+	}
+
 	@Test
 	public void propertyPlaceholderIgnored() throws Exception {
 		ApplicationContext applicationContext = new ClassPathXmlApplicationContext(

spring-context/src/test/resources/org/springframework/context/config/contextNamespaceHandlerTests-location-placeholder.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	   xmlns:context="http://www.springframework.org/schema/context"
+	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
+				http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
+
+	<context:property-placeholder location="${properties}" file-encoding="ISO-8859-1" trim-values="true"/>
+
+	<bean id="foo" class="java.lang.String">
+		<constructor-arg value="${foo}"/>
+	</bean>
+
+	<bean id="bar" class="java.lang.String">
+		<constructor-arg value="${bar}"/>
+	</bean>
+
+	<bean id="spam" class="java.lang.String">
+		<constructor-arg value="${spam}"/>
+	</bean>
+
+</beans>