AntClassLoader5 has become obsolete long ago

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

@@ -18,6 +18,7 @@
 package org.apache.tools.ant;
 
 import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
@@ -48,7 +49,6 @@ import org.apache.tools.ant.util.CollectionUtils;
 import org.apache.tools.ant.util.FileUtils;
 import org.apache.tools.ant.util.JavaEnvUtils;
 import org.apache.tools.ant.util.LoaderUtils;
-import org.apache.tools.ant.util.ReflectUtil;
 import org.apache.tools.ant.util.VectorSet;
 import org.apache.tools.zip.ZipLong;
 
@@ -69,7 +69,7 @@ import org.apache.tools.zip.ZipLong;
  * </p>
  *
  */
-public class AntClassLoader extends ClassLoader implements SubBuildListener {
+public class AntClassLoader extends ClassLoader implements SubBuildListener, Closeable {
 
     private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();
 
@@ -1550,20 +1550,15 @@ public class AntClassLoader extends ClassLoader implements SubBuildListener {
         return "AntClassLoader[" + getClasspath() + "]";
     }
 
-    private static Class<?> subClassToLoad = null;
-    private static final Class<?>[] CONSTRUCTOR_ARGS = new Class[] {
-        ClassLoader.class, Project.class, Path.class, Boolean.TYPE
-    };
+    /** {@inheritDoc} */
+    @Override
+    public Enumeration<URL> getResources(String name) throws IOException {
+        return getNamedResources(name);
+    }
 
-    static {
-        if (JavaEnvUtils.isAtLeastJavaVersion(JavaEnvUtils.JAVA_1_5)) {
-            try {
-                subClassToLoad =
-                    Class.forName("org.apache.tools.ant.loader.AntClassLoader5");
-            } catch (final ClassNotFoundException e) {
-                // this is Java5 but the installation is lacking our subclass
-            }
-        }
+    /** {@inheritDoc} */
+    public void close() {
+        cleanup();
     }
 
     /**
@@ -1573,15 +1568,6 @@ public class AntClassLoader extends ClassLoader implements SubBuildListener {
                                                    final Project project,
                                                    final Path path,
                                                    final boolean parentFirst) {
-        if (subClassToLoad != null) {
-            return (AntClassLoader)
-                ReflectUtil.newInstance(subClassToLoad,
-                                        CONSTRUCTOR_ARGS,
-                                        new Object[] {
-                                            parent, project, path,
-                                            Boolean.valueOf(parentFirst)
-                                        });
-        }
         return new AntClassLoader(parent, project, path, parentFirst);
     }
 

src/main/org/apache/tools/ant/loader/AntClassLoader5.java

@@ -18,20 +18,15 @@
 
 package org.apache.tools.ant.loader;
 
-import java.io.Closeable;
-import java.io.IOException;
-import java.net.URL;
-import java.util.Enumeration;
-
 import org.apache.tools.ant.AntClassLoader;
 import org.apache.tools.ant.Project;
 import org.apache.tools.ant.types.Path;
 
 /**
- * Overrides getResources which became non-final in Java5 and
- * implements Closeable
+ * @deprecated since 1.9.7
+ *             Just use {@link AntClassLoader} itself.
  */
-public class AntClassLoader5 extends AntClassLoader implements Closeable {
+public class AntClassLoader5 extends AntClassLoader {
     /**
      * Creates a classloader for the given project using the classpath given.
      *
@@ -53,13 +48,4 @@ public class AntClassLoader5 extends AntClassLoader implements Closeable {
         super(parent, project, classpath, parentFirst);
     }
 
-    /** {@inheritDoc} */
-    public Enumeration<URL> getResources(String name) throws IOException {
-        return getNamedResources(name);
-    }
-
-    /** {@inheritDoc} */
-    public void close() {
-        cleanup();
-    }
 }

src/tests/junit/org/apache/tools/ant/AntClassLoaderTest.java

@@ -19,16 +19,21 @@
 package org.apache.tools.ant;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
 import java.io.File;
+import java.io.IOException;
 import java.io.PrintStream;
 import java.net.URL;
+import java.util.Enumeration;
 
 import org.apache.tools.ant.types.Path;
 import org.apache.tools.ant.util.FileUtils;
+import org.apache.tools.ant.util.CollectionUtils;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
@@ -199,6 +204,44 @@ public class AntClassLoaderTest {
         }
     }
 
+    /**
+     * Asserts that getResources won't return resources that cannot be
+     * seen by AntClassLoader but by ClassLoader.this.parent.
+     *
+     * @see <a href="https://issues.apache.org/bugzilla/show_bug.cgi?id=46752">
+     *     https://issues.apache.org/bugzilla/show_bug.cgi?id=46752</a>
+     */
+    @Test
+    public void testGetResources() throws IOException {
+        AntClassLoader acl = new AntClassLoader(new EmptyLoader(), null,
+                                                new Path(null), true);
+        assertNull(acl.getResource("META-INF/MANIFEST.MF"));
+        assertFalse(acl.getResources("META-INF/MANIFEST.MF").hasMoreElements());
+
+        // double check using system classloader as parent
+        acl = new AntClassLoader(null, null, new Path(null), true);
+        assertNotNull(acl.getResource("META-INF/MANIFEST.MF"));
+        assertTrue(acl.getResources("META-INF/MANIFEST.MF").hasMoreElements());
+    }
+
+    @Test
+    public void testGetResourcesUsingFactory() throws IOException {
+        AntClassLoader acl =
+            AntClassLoader.newAntClassLoader(new EmptyLoader(), null,
+                                             new Path(null), true);
+        assertNull(acl.getResource("META-INF/MANIFEST.MF"));
+        assertFalse(acl.getResources("META-INF/MANIFEST.MF").hasMoreElements());
+    }
+
+    private static class EmptyLoader extends ClassLoader {
+        public URL getResource(String n) {
+            return null;
+        }
+        public Enumeration getResources(String n) {
+            return new CollectionUtils.EmptyEnumeration();
+        }
+    }
+
     private static class GetPackageWrapper extends ClassLoader {
         GetPackageWrapper(ClassLoader parent) {
             super(parent);

src/tests/junit/org/apache/tools/ant/loader/AntClassLoader5Test.java

@@ -1,73 +0,0 @@
-/*
- *  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.
- *
- */
-
-package org.apache.tools.ant.loader;
-
-import java.io.IOException;
-import java.net.URL;
-import java.util.Enumeration;
-import org.apache.tools.ant.AntClassLoader;
-import org.apache.tools.ant.types.Path;
-import org.apache.tools.ant.util.CollectionUtils;
-import org.junit.Test;
-
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertTrue;
-
-public class AntClassLoader5Test {
-
-    /**
-     * Asserts that getResources won't return resources that cannot be
-     * seen by AntClassLoader but by ClassLoader.this.parent.
-     *
-     * @see <a href="https://issues.apache.org/bugzilla/show_bug.cgi?id=46752">
-     *     https://issues.apache.org/bugzilla/show_bug.cgi?id=46752</a>
-     */
-    @Test
-    public void testGetResources() throws IOException {
-        AntClassLoader acl = new AntClassLoader5(new EmptyLoader(), null,
-                                                 new Path(null), true);
-        assertNull(acl.getResource("META-INF/MANIFEST.MF"));
-        assertFalse(acl.getResources("META-INF/MANIFEST.MF").hasMoreElements());
-
-        // double check using system classloader as parent
-        acl = new AntClassLoader5(null, null, new Path(null), true);
-        assertNotNull(acl.getResource("META-INF/MANIFEST.MF"));
-        assertTrue(acl.getResources("META-INF/MANIFEST.MF").hasMoreElements());
-    }
-
-    @Test
-    public void testGetResourcesUsingFactory() throws IOException {
-        AntClassLoader acl =
-            AntClassLoader.newAntClassLoader(new EmptyLoader(), null,
-                                             new Path(null), true);
-        assertNull(acl.getResource("META-INF/MANIFEST.MF"));
-        assertFalse(acl.getResources("META-INF/MANIFEST.MF").hasMoreElements());
-    }
-
-    private static class EmptyLoader extends ClassLoader {
-        public URL getResource(String n) {
-            return null;
-        }
-        public Enumeration getResources(String n) {
-            return new CollectionUtils.EmptyEnumeration();
-        }
-    }
-}