org.apache.myfaces.shared_impl.util.FastWriter Maven / Gradle / Ivy
/*
* 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.myfaces.shared_impl.util;
import java.io.IOException;
import java.io.Writer;
/**
* StringWriter cannot be reused without create a new object over and over.
* This class provide a simple implementation that allows reuse the same buffer
* in a efficient way.
*
* @author Jacob Hookom
* @version $Id: FastWriter.java,v 1.4 2008/07/13 19:01:34 rlubke Exp $
*/
public final class FastWriter extends Writer
{
private char[] buff;
private int size;
public FastWriter()
{
this(1024);
}
public FastWriter(int initialSize)
{
if (initialSize < 0)
{
throw new IllegalArgumentException("Initial Size cannot be less than 0");
}
this.buff = new char[initialSize];
}
public void close() throws IOException
{
// do nothing
}
public void flush() throws IOException
{
// do nothing
}
private final void overflow(int len)
{
if (this.size + len > this.buff.length)
{
char[] next = new char[(this.size + len) * 2];
System.arraycopy(this.buff, 0, next, 0, this.size);
this.buff = next;
}
}
public void write(char[] cbuf, int off, int len) throws IOException
{
overflow(len);
System.arraycopy(cbuf, off, this.buff, this.size, len);
this.size += len;
}
public void write(char[] cbuf) throws IOException
{
this.write(cbuf, 0, cbuf.length);
}
public void write(int c) throws IOException
{
this.overflow(1);
this.buff[this.size] = (char) c;
this.size++;
}
public void write(String str, int off, int len) throws IOException
{
this.write(str.toCharArray(), off, len);
}
public void write(String str) throws IOException
{
this.write(str.toCharArray(), 0, str.length());
}
public void reset()
{
this.size = 0;
}
public String toString()
{
return new String(this.buff, 0, this.size);
}
}