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Groovy: A powerful, dynamic language for the JVM
/**
* 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.codehaus.groovy.runtime;
import java.io.IOException;
import java.io.Writer;
/**
* This class codes around a silly limitation of StringWriter which doesn't allow a StringBuffer
* to be passed in as a constructor for some bizarre reason.
* So we replicate the behaviour of StringWriter here but allow a StringBuffer to be passed in.
*
* @author James Strachan
*/
public class StringBufferWriter extends Writer {
private StringBuffer buffer;
/**
* Create a new string writer which will append the text to the given StringBuffer
*/
public StringBufferWriter(StringBuffer buffer) {
this.buffer = buffer;
}
/**
* Write a single character.
*/
public void write(int c) {
buffer.append((char) c);
}
/**
* Write a portion of an array of characters.
*
* @param text Array of characters
* @param offset Offset from which to start writing characters
* @param length Number of characters to write
*/
public void write(char text[], int offset, int length) {
if ((offset < 0) || (offset > text.length) || (length < 0) || ((offset + length) > text.length) || ((offset + length) < 0)) {
throw new IndexOutOfBoundsException();
}
else if (length == 0) {
return;
}
buffer.append(text, offset, length);
}
/**
* Write a string.
*/
public void write(String text) {
buffer.append(text);
}
/**
* Write a portion of a string.
*
* @param text the text to be written
* @param offset offset from which to start writing characters
* @param length Number of characters to write
*/
public void write(String text, int offset, int length) {
buffer.append(text.substring(offset, offset + length));
}
/**
* Return the buffer's current value as a string.
*/
public String toString() {
return buffer.toString();
}
/**
* Flush the stream.
*/
public void flush() {
}
/**
* Closing a StringWriter has no effect. The methods in this
* class can be called after the stream has been closed without generating
* an IOException.
*/
public void close() throws IOException {
}
}