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diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipExtraField.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipExtraField.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.zip;
+
+import java.util.zip.ZipException;
+
+/**
+ * General format of extra field data.
+ *
+ * <p>Extra fields usually appear twice per file, once in the local
+ * file data and once in the central directory.  Usually they are the
+ * same, but they don't have to be.  {@link
+ * java.util.zip.ZipOutputStream java.util.zip.ZipOutputStream} will
+ * only use the local file data in both places.</p>
+ *
+ */
+public interface ZipExtraField {
+
+    /**
+     * The Header-ID.
+     * @return the header id
+     * @since 1.1
+     */
+    ZipShort getHeaderId();
+
+    /**
+     * Length of the extra field in the local file data - without
+     * Header-ID or length specifier.
+     * @return the length of the field in the local file data
+     * @since 1.1
+     */
+    ZipShort getLocalFileDataLength();
+
+    /**
+     * Length of the extra field in the central directory - without
+     * Header-ID or length specifier.
+     * @return the length of the field in the central directory
+     * @since 1.1
+     */
+    ZipShort getCentralDirectoryLength();
+
+    /**
+     * The actual data to put into local file data - without Header-ID
+     * or length specifier.
+     * @return the data
+     * @since 1.1
+     */
+    byte[] getLocalFileDataData();
+
+    /**
+     * The actual data to put into central directory - without Header-ID or
+     * length specifier.
+     * @return the data
+     * @since 1.1
+     */
+    byte[] getCentralDirectoryData();
+
+    /**
+     * Populate data from this array as if it was in local file data.
+     * @param data an array of bytes
+     * @param offset the start offset
+     * @param length the number of bytes in the array from offset
+     *
+     * @since 1.1
+     * @throws ZipException on error
+     */
+    void parseFromLocalFileData(byte[] data, int offset, int length)
+        throws ZipException;
+}