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java/org/apache/tomcat/util/scan/NonClosingJarInputStream.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.tomcat.util.scan;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.jar.JarInputStream;
+
+/**
+ * When using a {@link JarInputStream} with an XML parser, the stream will be
+ * closed by the parser. This causes problems if multiple entries from the JAR
+ * need to be parsed. This implementation makes {{@link #close()} a NO-OP and
+ * adds {@link #reallyClose()} that will close the stream.
+ */
+public class NonClosingJarInputStream extends JarInputStream {
+
+    public NonClosingJarInputStream(InputStream in, boolean verify)
+            throws IOException {
+        super(in, verify);
+    }
+
+    public NonClosingJarInputStream(InputStream in) throws IOException {
+        super(in);
+    }
+
+    @Override
+    public void close() throws IOException {
+        // Make this a NO-OP so that further entries can be read from the stream
+    }
+
+    public void reallyClose() throws IOException {
+        super.close();
+    }
+}