1 files changed, 147 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/ConcatResourceInputStream.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/ConcatResourceInputStream.java
new file mode 100644
index 00000000..7bae58e5
--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/ConcatResourceInputStream.java
@@ -0,0 +1,147 @@
+/*
+ *  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.util;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Iterator;
+
+import org.apache.tools.ant.Project;
+import org.apache.tools.ant.ProjectComponent;
+import org.apache.tools.ant.types.Resource;
+import org.apache.tools.ant.types.ResourceCollection;
+
+/**
+ * Special <code>InputStream</code> that will
+ * concatenate the contents of Resources from a single ResourceCollection.
+ * @since Ant 1.7
+ */
+public class ConcatResourceInputStream extends InputStream {
+
+    private static final int EOF = -1;
+    private boolean eof = false;
+    private Iterator<Resource> iter;
+    private InputStream currentStream;
+    private ProjectComponent managingPc;
+    private boolean ignoreErrors = false;
+
+  /**
+   * Construct a new ConcatResourceInputStream
+   * for the specified ResourceCollection.
+   * @param rc the ResourceCollection to combine.
+   */
+    public ConcatResourceInputStream(ResourceCollection rc) {
+        iter = rc.iterator();
+    }
+
+    /**
+     * Set whether this ConcatResourceInputStream ignores errors.
+     * @param b whether to ignore errors.
+     */
+    public void setIgnoreErrors(boolean b) {
+        ignoreErrors = b;
+    }
+
+    /**
+     * Find out whether this ConcatResourceInputStream ignores errors.
+     * @return boolean ignore-errors flag.
+     */
+    public boolean isIgnoreErrors() {
+        return ignoreErrors;
+    }
+
+    /**
+     * Close the stream.
+     * @throws IOException if there is an error.
+     */
+     public void close() throws IOException {
+        closeCurrent();
+        eof = true;
+    }
+
+    /**
+     * Read a byte.
+     * @return the byte (0 - 255) or -1 if this is the end of the stream.
+     * @throws IOException if there is an error.
+     */
+    public int read() throws IOException {
+        if (eof) {
+            return EOF;
+        }
+        int result = readCurrent();
+        if (result == EOF) {
+            nextResource();
+            result = readCurrent();
+        }
+        return result;
+    }
+
+    /**
+     * Set a managing <code>ProjectComponent</code> for
+     * this <code>ConcatResourceInputStream</code>.
+     * @param pc   the managing <code>ProjectComponent</code>.
+     */
+    public void setManagingComponent(ProjectComponent pc) {
+        this.managingPc = pc;
+    }
+
+    /**
+     * Log a message with the specified logging level.
+     * @param message    the <code>String</code> message.
+     * @param loglevel   the <code>int</code> logging level.
+     */
+    public void log(String message, int loglevel) {
+        if (managingPc != null) {
+            managingPc.log(message, loglevel);
+        } else {
+            (loglevel > Project.MSG_WARN ? System.out : System.err).println(message);
+        }
+    }
+
+    private int readCurrent() throws IOException {
+        return eof || currentStream == null ? EOF : currentStream.read();
+    }
+
+    private void nextResource() throws IOException {
+        closeCurrent();
+        while (iter.hasNext()) {
+            Resource r = (Resource) iter.next();
+            if (!r.isExists()) {
+                continue;
+            }
+            log("Concating " + r.toLongString(), Project.MSG_VERBOSE);
+            try {
+                currentStream = new BufferedInputStream(r.getInputStream());
+                return;
+            } catch (IOException eyeOhEx) {
+                if (!ignoreErrors) {
+                    log("Failed to get input stream for " + r, Project.MSG_ERR);
+                    throw eyeOhEx;
+                }
+            }
+        }
+        eof = true;
+    }
+
+    private void closeCurrent() {
+        FileUtils.close(currentStream);
+        currentStream = null;
+    }
+}