/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2009-2011 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.grizzly.utils;
import org.glassfish.grizzly.attributes.AttributeStorage;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import org.glassfish.grizzly.AbstractTransformer;
import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.TransformationException;
import org.glassfish.grizzly.TransformationResult;
/**
* String decoder, which decodes {@link Buffer} to {@link String}
*
* @author Alexey Stashok
*/
public class StringEncoder extends AbstractTransformer<String, Buffer> {
protected Charset charset;
protected String stringTerminator = null;
public StringEncoder() {
this((String) null);
}
public StringEncoder(String stringTerminator) {
this(null, null);
}
public StringEncoder(Charset charset) {
this(charset, null);
}
public StringEncoder(Charset charset, String stringTerminator) {
if (charset != null) {
this.charset = charset;
} else {
this.charset = Charset.defaultCharset();
}
this.stringTerminator = stringTerminator;
}
@Override
public String getName() {
return "StringEncoder";
}
@Override
protected TransformationResult<String, Buffer> transformImpl(
AttributeStorage storage, String input)
throws TransformationException {
if (input == null) {
throw new TransformationException("Input could not be null");
}
byte[] byteRepresentation;
try {
if (stringTerminator != null) {
input = input + stringTerminator;
}
byteRepresentation = input.getBytes(charset.name());
} catch(UnsupportedEncodingException e) {
throw new TransformationException("Charset " +
charset.name() + " is not supported", e);
}
final Buffer output =
obtainMemoryManager(storage).allocate(byteRepresentation.length + 4);
if (stringTerminator == null) {
output.putInt(byteRepresentation.length);
}
output.put(byteRepresentation);
output.flip();
output.allowBufferDispose(true);
return TransformationResult.createCompletedResult(output, null);
}
@Override
public boolean hasInputRemaining(AttributeStorage storage, String input) {
return input != null;
}
public Charset getCharset() {
return charset;
}
public void setCharset(Charset charset) {
this.charset = charset;
}
}