use the same logic as getResource in getResourceAsStream. PR 44103

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@799650 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -415,6 +415,11 @@ Fixed bugs:
  * AntClassLoader didn't set the proper CodeSource for loaded classes.
    Bugzilla Report 20174.
 
+ * AntClassLoader.getResourceAsStream would return streams to
+   resources it didn't return with getResource and to classes it
+   failed to load.
+   Bugzilla Report 44103.
+
 Other changes:
 --------------
  * The get task now also follows redirects from http to https

src/main/org/apache/tools/ant/AntClassLoader.java

@@ -705,6 +705,7 @@ public class AntClassLoader extends ClassLoader implements SubBuildListener {
         InputStream resourceStream = null;
         if (isParentFirst(name)) {
             resourceStream = loadBaseResource(name);
+        }
             if (resourceStream != null) {
                 log("ResourceStream for " + name
                     + " loaded from parent loader", Project.MSG_DEBUG);
@@ -715,17 +716,16 @@ public class AntClassLoader extends ClassLoader implements SubBuildListener {
                         + " loaded from ant loader", Project.MSG_DEBUG);
                 }
             }
-        } else {
-            resourceStream = loadResource(name);
-            if (resourceStream != null) {
-                log("ResourceStream for " + name + " loaded from ant loader", Project.MSG_DEBUG);
+        if (resourceStream == null && !isParentFirst(name)) {
+            if (ignoreBase) {
+                resourceStream = getRootLoader() == null ? null : getRootLoader().getResourceAsStream(name);
             } else {
                 resourceStream = loadBaseResource(name);
+            }
                 if (resourceStream != null) {
                     log("ResourceStream for " + name + " loaded from parent loader",
                             Project.MSG_DEBUG);
                 }
-            }
         }
         if (resourceStream == null) {
             log("Couldn't load ResourceStream for " + name, Project.MSG_DEBUG);
@@ -766,7 +766,7 @@ public class AntClassLoader extends ClassLoader implements SubBuildListener {
      *         the resource cannot be found.
      */
     private InputStream loadBaseResource(String name) {
-        return parent == null ? getSystemResourceAsStream(name) : parent.getResourceAsStream(name);
+        return parent == null ? super.getResourceAsStream(name) : parent.getResourceAsStream(name);
     }
 
     /**

src/tests/antunit/core/classloader-test.xml

@@ -0,0 +1,83 @@
+<?xml version="1.0"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one or more
+  contributor license agreements.  See the NOTICE file distributed with
+  this work for additional information regarding copyright ownership.
+  The ASF licenses this file to You 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 xmlns:au="antlib:org.apache.ant.antunit" default="antunit">
+
+  <import file="../antunit-base.xml"/>
+
+  <target name="setUp">
+    <mkdir dir="${input}"/>
+    <mkdir dir="${output}"/>
+  </target>
+
+  <target name="testGetResource"
+          description="https://issues.apache.org/bugzilla/show_bug.cgi?id=44103"
+          depends="setUp">
+    <echo file="${input}/A.java"><![CDATA[
+public class A {
+    public static void main(String[] args) {
+        if (A.class.getClassLoader().getResource("org/apache/xerces/jaxp/DocumentBuilderFactoryImpl.class") != null) {
+            throw new RuntimeException("Didn't expect to find DocumenBuilderImpl");
+        }
+    }
+}
+]]></echo>
+    <javac srcdir="${input}" destdir="${output}"/>
+    <java classname="A" failonerror="true" fork="false">
+      <classpath location="${output}"/>
+    </java>
+  </target>
+
+  <target name="testLoadClass"
+          description="https://issues.apache.org/bugzilla/show_bug.cgi?id=44103"
+          depends="setUp">
+    <echo file="${input}/A.java"><![CDATA[
+public class A {
+    public static void main(String[] args) {
+        try {
+            A.class.getClassLoader().loadClass("org.apache.xerces.jaxp.DocumentBuilderFactoryImpl");
+            throw new RuntimeException("Didn't expect to find DocumenBuilderImpl");
+        } catch (ClassNotFoundException cnfe) {
+        }
+    }
+}
+]]></echo>
+    <javac srcdir="${input}" destdir="${output}"/>
+    <java classname="A" failonerror="true" fork="false">
+      <classpath location="${output}"/>
+    </java>
+  </target>
+
+  <target name="testGetResourceAsStream"
+          description="https://issues.apache.org/bugzilla/show_bug.cgi?id=44103"
+          depends="setUp">
+    <echo file="${input}/A.java"><![CDATA[
+public class A {
+    public static void main(String[] args) {
+        if (A.class.getClassLoader().getResourceAsStream("org/apache/xerces/jaxp/DocumentBuilderFactoryImpl.class") != null) {
+            throw new RuntimeException("Didn't expect to find DocumenBuilderImpl");
+        }
+    }
+}
+]]></echo>
+    <javac srcdir="${input}" destdir="${output}"/>
+    <java classname="A" failonerror="true" fork="false">
+      <classpath location="${output}"/>
+    </java>
+  </target>
+
+</project>