1 files changed, 89 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/optional/depend/JarFileIterator.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/optional/depend/JarFileIterator.java
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index 00000000..bc315d2e
--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/optional/depend/JarFileIterator.java
@@ -0,0 +1,89 @@
+/*
+ *  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.taskdefs.optional.depend;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+/**
+ * A class file iterator which iterates through the contents of a Java jar
+ * file.
+ *
+ */
+public class JarFileIterator implements ClassFileIterator {
+    /** The jar stream from the jar file being iterated over*/
+    private ZipInputStream jarStream;
+
+    /**
+     * Construct an iterator over a jar stream
+     *
+     * @param stream the basic input stream from which the Jar is received
+     * @exception IOException if the jar stream cannot be created
+     */
+    public JarFileIterator(InputStream stream) throws IOException {
+        super();
+
+        jarStream = new ZipInputStream(stream);
+    }
+
+    /**
+     * Get the next ClassFile object from the jar
+     *
+     * @return a ClassFile object describing the class from the jar
+     */
+    public ClassFile getNextClassFile() {
+        ZipEntry jarEntry;
+        ClassFile nextElement = null;
+
+        try {
+            jarEntry = jarStream.getNextEntry();
+
+            while (nextElement == null && jarEntry != null) {
+                String entryName = jarEntry.getName();
+
+                if (!jarEntry.isDirectory() && entryName.endsWith(".class")) {
+
+                    // create a data input stream from the jar input stream
+                    ClassFile javaClass = new ClassFile();
+
+                    javaClass.read(jarStream);
+
+                    nextElement = javaClass;
+                } else {
+
+                    jarEntry = jarStream.getNextEntry();
+                }
+            }
+        } catch (IOException e) {
+            String message = e.getMessage();
+            String text = e.getClass().getName();
+
+            if (message != null) {
+                text += ": " + message;
+            }
+
+            throw new RuntimeException("Problem reading JAR file: " + text);
+        }
+
+        return nextElement;
+    }
+
+}
+