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diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/ZipFileSet.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/ZipFileSet.java
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+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/ZipFileSet.java
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+/*
+ *  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.types;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.Project;
+
+/**
+ * A ZipFileSet is a FileSet with extra attributes useful in the context of
+ * Zip/Jar tasks.
+ *
+ * A ZipFileSet extends FileSets with the ability to extract a subset of the
+ * entries of a Zip file for inclusion in another Zip file.  It also includes
+ * a prefix attribute which is prepended to each entry in the output Zip file.
+ *
+ * Since ant 1.6 ZipFileSet can be defined with an id and referenced in packaging tasks
+ *
+ */
+public class ZipFileSet extends ArchiveFileSet {
+
+    /** Constructor for ZipFileSet */
+    public ZipFileSet() {
+        super();
+    }
+
+    /**
+     * Constructor using a fileset argument.
+     * @param fileset the fileset to use
+     */
+    protected ZipFileSet(FileSet fileset) {
+        super(fileset);
+    }
+
+    /**
+     * Constructor using a zipfileset argument.
+     * @param fileset the zipfileset to use
+     */
+    protected ZipFileSet(ZipFileSet fileset) {
+        super(fileset);
+    }
+
+    /**
+     * Return a new archive scanner based on this one.
+     * @return a new ZipScanner with the same encoding as this one.
+     */
+    protected ArchiveScanner newArchiveScanner() {
+        ZipScanner zs = new ZipScanner();
+        zs.setEncoding(getEncoding());
+        return zs;
+    }
+
+    /**
+     * A ZipFileset accepts another ZipFileSet or a FileSet as reference
+     * FileSets are often used by the war task for the lib attribute
+     * @param p the project to use
+     * @return the abstract fileset instance
+     */
+    protected AbstractFileSet getRef(Project p) {
+        dieOnCircularReference(p);
+        Object o = getRefid().getReferencedObject(p);
+        if (o instanceof ZipFileSet) {
+            return (AbstractFileSet) o;
+        } else if (o instanceof FileSet) {
+            ZipFileSet zfs = new ZipFileSet((FileSet) o);
+            configureFileSet(zfs);
+            return zfs;
+        } else {
+            String msg = getRefid().getRefId() + " doesn\'t denote a zipfileset or a fileset";
+            throw new BuildException(msg);
+        }
+    }
+
+    /**
+     * Return a ZipFileSet that has the same properties
+     * as this one.
+     * @return the cloned zipFileSet
+     */
+    public Object clone() {
+        if (isReference()) {
+            return ((ZipFileSet) getRef(getProject())).clone();
+        } else {
+            return super.clone();
+        }
+    }
+
+    /**
+     * A check attributes for zipFileSet.
+     * If there is a reference, and
+     * it is a ZipFileSet, the zip fileset attributes
+     * cannot be used.
+     */
+    private void checkZipFileSetAttributesAllowed() {
+        if (getProject() == null
+            || (isReference()
+                && (getRefid().getReferencedObject(
+                        getProject())
+                    instanceof ZipFileSet))) {
+            checkAttributesAllowed();
+        }
+    }
+
+}