Index: src/main/java/org/apache/jackrabbit/util/PipedStream.java
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--- src/main/java/org/apache/jackrabbit/util/PipedStream.java (revision 0)
+++ src/main/java/org/apache/jackrabbit/util/PipedStream.java (revision 0)
@@ -0,0 +1,131 @@
+/*
+ * 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.jackrabbit.util;
+
+import java.io.PipedInputStream;
+import java.io.IOException;
+import java.io.PipedOutputStream;
+import java.io.OutputStream;
+import java.io.InputStream;
+
+import javax.jcr.Node;
+import javax.jcr.ValueFactory;
+
+/**
+ * PipedStream is a utility class that allows you to
+ * {@link #write(OutputStream)} data into an output stream, which is then piped
+ * into an input stream that can be consumed by the repository implementation in
+ * a call to {@link Node#setProperty(String, InputStream)} or
+ * {@link ValueFactory#createBinary(InputStream)}.
+ */
+public abstract class PipedStream extends PipedInputStream {
+
+ /**
+ * Set when an exception is thrown while writing data into the output
+ * stream. This exception is picked up by the piped input stream when read
+ * methods are called.
+ */
+ private volatile IOException exception;
+
+ /**
+ * Creates a new BinaryStream instance.
+ *
+ * @throws IOException if an I/O error occurs.
+ */
+ public PipedStream() throws IOException {
+ super();
+ final PipedOutputStream out = new PipedOutputStream();
+ connect(out);
+ new Thread(new Runnable() {
+ public void run() {
+ try {
+ PipedStream.this.write(out);
+ } catch (Throwable e) {
+ if (e instanceof IOException) {
+ exception = (IOException) e;
+ } else {
+ exception = (IOException) new IOException(e.getMessage()).initCause(e);
+ }
+ } finally {
+ try {
+ out.close();
+ } catch (IOException e) {
+ // do not overwrite existing exception
+ if (exception == null) {
+ exception = e;
+ }
+ }
+ }
+ }
+ }).start();
+ }
+
+ /**
+ * Sub class responsiblity. This is where the data is written and piped to
+ * the input stream. The calling thread guarantees that the output stream
+ * is closed when this method returns successfully as well as when this
+ * method throws an exception.
+ *
+ * @param out where the data must be written to.
+ * @throws IOException if an I/O error occurs.
+ */
+ public abstract void write(OutputStream out) throws IOException;
+
+ /**
+ * {@inheritDoc}
+ */
+ public int read(byte b[], int off, int len) throws IOException {
+ checkException();
+ return super.read(b, off, len);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public int read() throws IOException {
+ checkException();
+ return super.read();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public int available() throws IOException {
+ checkException();
+ return super.available();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public void close() throws IOException {
+ checkException();
+ super.close();
+ }
+
+ /**
+ * Checks if there was an exception while data was written to the piped
+ * output stream.
+ *
+ * @throws IOException if an I/O error occurs.
+ */
+ protected void checkException() throws IOException {
+ if (exception != null) {
+ throw exception;
+ }
+ }
+}
Property changes on: src\main\java\org\apache\jackrabbit\util\PipedStream.java
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Added: svn:eol-style
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Index: src/test/java/org/apache/jackrabbit/util/PipedStreamTest.java
===================================================================
--- src/test/java/org/apache/jackrabbit/util/PipedStreamTest.java (revision 0)
+++ src/test/java/org/apache/jackrabbit/util/PipedStreamTest.java (revision 0)
@@ -0,0 +1,72 @@
+/*
+ * 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.jackrabbit.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+import java.util.Random;
+
+import junit.framework.TestCase;
+
+/**
+ * PipedStreamTest contains test cases for {@link PipedStream}.
+ */
+public class PipedStreamTest extends TestCase {
+
+ public void testStream() throws Exception {
+ Random rand = new Random();
+ final byte[] data = new byte[10 * 1024];
+ rand.nextBytes(data);
+ ByteArrayOutputStream out = new ByteArrayOutputStream();
+ InputStream in = new PipedStream() {
+ public void write(OutputStream out) throws IOException {
+ for (byte b : data) {
+ out.write(new byte[]{b});
+ }
+ }
+ };
+ byte[] buf = new byte[1024];
+ int num;
+ while ((num = in.read(buf)) != -1) {
+ out.write(buf, 0, num);
+ }
+ // check data
+ byte[] result = out.toByteArray();
+ assertEquals(data.length, result.length);
+ for (int i = 0; i < data.length; i++) {
+ assertEquals(data[i], result[i]);
+ }
+ }
+
+ public void testException() throws Exception {
+ InputStream in = new PipedStream() {
+ public void write(OutputStream out) throws IOException {
+ out.write("test".getBytes("UTF-8"));
+ throw new IOException();
+ }
+ };
+ try {
+ while (in.read() != -1) {
+ }
+ fail("IOException expected");
+ } catch (IOException e) {
+ // expected
+ }
+ }
+}
Property changes on: src\test\java\org\apache\jackrabbit\util\PipedStreamTest.java
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Added: svn:eol-style
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