/*
* 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.core.xml;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.CharArrayReader;
import java.io.CharArrayWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import javax.jcr.RepositoryException;
import org.xml.sax.InputSource;
/**
* Input source that clones existing input source. After cloning the existing
* input source should not be used anymore. To make more copies call
* {@link #cloneInputSource()} method.
*/
public class ClonedInputSource extends InputSource {
private final char[] characterArray;
private final byte[] byteArray;
/**
* Clone existing input source.
*
* @param input
* @throws RepositoryException
*/
public ClonedInputSource(InputSource input) throws RepositoryException {
if (input == null) {
throw new IllegalArgumentException(
"Argument 'input' may not be null.");
}
characterArray = read(input.getCharacterStream());
byteArray = read(input.getByteStream());
setEncoding(input.getEncoding());
setPublicId(input.getPublicId());
setSystemId(input.getSystemId());
if (characterArray != null) {
setCharacterStream(new CharArrayReader(characterArray));
}
if (byteArray != null) {
setByteStream(new ByteArrayInputStream(byteArray));
}
}
private ClonedInputSource(char[] characterArray, byte[] byteArray) {
super();
this.characterArray = characterArray;
this.byteArray = byteArray;
}
public char[] getCharacterArray() {
return characterArray;
}
public byte[] getByteArray() {
return byteArray;
}
/**
* Make a clone if this input source. The input source being cloned is still
* valid after cloning.
*
* @return input source clone.
*/
public ClonedInputSource cloneInputSource() {
ClonedInputSource res = new ClonedInputSource(characterArray, byteArray);
res.setEncoding(getEncoding());
res.setPublicId(getPublicId());
res.setSystemId(getSystemId());
if (byteArray != null) {
res.setByteStream(new ByteArrayInputStream(byteArray));
}
if (characterArray != null) {
res.setCharacterStream(new CharArrayReader(characterArray));
}
return res;
}
private static byte[] read(InputStream stream) throws RepositoryException {
if (stream != null) {
try {
final int bufferSize = Math.min(stream.available(), 4096);
ByteArrayOutputStream s = new ByteArrayOutputStream(bufferSize);
byte[] buffer = new byte[bufferSize];
while (true) {
int numRead = stream.read(buffer);
if (numRead > 0) {
s.write(buffer, 0, numRead);
}
if (numRead != bufferSize) {
break;
}
}
return s.toByteArray();
} catch (IOException e) {
throw new RepositoryException(e);
} finally {
try {
stream.close();
} catch (IOException ignore) {
}
}
} else {
return null;
}
}
private static char[] read(Reader reader) throws RepositoryException {
if (reader != null) {
try {
final int bufferSize = 4096;
CharArrayWriter w = new CharArrayWriter(bufferSize);
char[] buffer = new char[bufferSize];
while (true) {
int numRead = reader.read(buffer);
if (numRead > 0) {
w.write(buffer, 0, numRead);
}
if (numRead != bufferSize) {
break;
}
}
return w.toCharArray();
} catch (IOException e) {
throw new RepositoryException(e);
} finally {
try {
reader.close();
} catch (IOException ignore) {
}
}
} else {
return null;
}
}
}