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JSF components and utilities that can be used with any JSF implementation. This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build changes to take advantage of JSF2.1 features. A JSF2.1 implementation is required to use this version of the Tomahawk library.

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/*
 * 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_tomahawk.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 1187700 2011-10-22 12:19:37Z bommel $
 */
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);
    }
}