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Diffstat (limited to 'branches/sca-android-r643746/modules/contribution-impl/src/main/java/org/apache/tuscany/sca/contribution/service/util/IOHelper.java')
-rw-r--r-- | branches/sca-android-r643746/modules/contribution-impl/src/main/java/org/apache/tuscany/sca/contribution/service/util/IOHelper.java | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/branches/sca-android-r643746/modules/contribution-impl/src/main/java/org/apache/tuscany/sca/contribution/service/util/IOHelper.java b/branches/sca-android-r643746/modules/contribution-impl/src/main/java/org/apache/tuscany/sca/contribution/service/util/IOHelper.java new file mode 100644 index 0000000000..6cbdc87d55 --- /dev/null +++ b/branches/sca-android-r643746/modules/contribution-impl/src/main/java/org/apache/tuscany/sca/contribution/service/util/IOHelper.java @@ -0,0 +1,190 @@ +/*
+ * 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.tuscany.sca.contribution.service.util;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.JarURLConnection;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.jar.JarFile;
+
+public class IOHelper {
+ /**
+ * The default buffer size to use.
+ */
+ private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
+
+ /**
+ * Unconditionally close an <code>InputStream</code>.
+ * <p>
+ * Equivalent to {@link InputStream#close()}, except any exceptions will be ignored.
+ * This is typically used in finally blocks.
+ *
+ * @param input the InputStream to close, may be null or already closed
+ */
+ public static void closeQuietly(InputStream input) {
+ try {
+ if (input != null) {
+ input.close();
+ }
+ } catch (IOException ioe) {
+ // ignore
+ }
+ }
+
+ /**
+ * Unconditionally close an <code>OutputStream</code>.
+ * <p>
+ * Equivalent to {@link OutputStream#close()}, except any exceptions will be ignored.
+ * This is typically used in finally blocks.
+ *
+ * @param output the OutputStream to close, may be null or already closed
+ */
+ public static void closeQuietly(OutputStream output) {
+ try {
+ if (output != null) {
+ output.close();
+ }
+ } catch (IOException ioe) {
+ // ignore
+ }
+ }
+
+ /**
+ * Copy bytes from an <code>InputStream</code> to an
+ * <code>OutputStream</code>.
+ * <p>
+ * This method buffers the input internally, so there is no need to use a
+ * <code>BufferedInputStream</code>.
+ *
+ * @param input the <code>InputStream</code> to read from
+ * @param output the <code>OutputStream</code> to write to
+ * @return the number of bytes copied
+ * @throws NullPointerException if the input or output is null
+ * @throws IOException if an I/O error occurs
+ * @since Commons IO 1.1
+ */
+ public static int copy(InputStream input, OutputStream output) throws IOException {
+ byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
+ int count = 0;
+ int n = 0;
+ while (-1 != (n = input.read(buffer))) { // NOPMD
+ output.write(buffer, 0, n);
+ count += n;
+ }
+ return count;
+ }
+
+ public static InputStream getInputStream(URL url) throws IOException {
+ return new SafeURLInputStream(url);
+ }
+
+ /**
+ * This class is a workaround for URL stream issue as illustrated below.
+ * InputStream is=url.getInputStream(); is.close(); // This line doesn't close
+ * the JAR file if the URL is a jar entry like "jar:file:/a.jar!/my.composite" We
+ * also need to turn off the JarFile cache.
+ *
+ * @see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4950148
+ *
+ * @version $Rev: 641216 $ $Date: 2008-03-26 01:15:08 -0800 (Wed, 26 Mar 2008) $
+ */
+ public static class SafeURLInputStream extends InputStream {
+ private JarFile jarFile;
+ private InputStream is;
+
+ public SafeURLInputStream(URL url) throws IOException {
+ String protocol = url.getProtocol();
+ if (protocol != null && (protocol.equals("jar"))) {
+ JarURLConnection connection = (JarURLConnection)url.openConnection();
+ // We cannot use cache
+ connection.setUseCaches(false);
+ try {
+ is = connection.getInputStream();
+ } catch (IOException e) {
+ throw e;
+ }
+ jarFile = connection.getJarFile();
+ } else {
+ URLConnection connection = url.openConnection();
+ connection.setUseCaches(false);
+ is = connection.getInputStream();
+ }
+ }
+
+ public SafeURLInputStream(JarURLConnection connection) throws IOException {
+ // We cannot use cache
+ connection.setUseCaches(false);
+ is = connection.getInputStream();
+ jarFile = connection.getJarFile();
+ }
+
+ @Override
+ public int available() throws IOException {
+ return is.available();
+ }
+
+ @Override
+ public void close() throws IOException {
+ is.close();
+ // We need to close the JAR file
+ if (jarFile != null) {
+ jarFile.close();
+ }
+ }
+
+ @Override
+ public synchronized void mark(int readlimit) {
+ is.mark(readlimit);
+ }
+
+ @Override
+ public boolean markSupported() {
+ return is.markSupported();
+ }
+
+ @Override
+ public int read() throws IOException {
+ return is.read();
+ }
+
+ @Override
+ public int read(byte[] b, int off, int len) throws IOException {
+ return is.read(b, off, len);
+ }
+
+ @Override
+ public int read(byte[] b) throws IOException {
+ return is.read(b);
+ }
+
+ @Override
+ public synchronized void reset() throws IOException {
+ is.reset();
+ }
+
+ @Override
+ public long skip(long n) throws IOException {
+ return is.skip(n);
+ }
+ }
+}
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