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Xalan-Java is an XSLT processor for transforming XML documents into HTML, text, or other XML document types. It implements XSL Transformations (XSLT) Version 1.0 and XML Path Language (XPath) Version 1.0 and can be used from the command line, in an applet or a servlet, or as a module in other program.

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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.
 */
/*
 * $Id: WriterOutputBuffer.java 468652 2006-10-28 07:05:17Z minchau $
 */

package org.apache.xalan.xsltc.runtime.output;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.Writer;

/**
 * @author Santiago Pericas-Geertsen
 */
class WriterOutputBuffer implements OutputBuffer {
    private static final int KB = 1024;
    private static int BUFFER_SIZE = 4 * KB;

    static {
	// Set a larger buffer size for Solaris
	final String osName = System.getProperty("os.name");
	if (osName.equalsIgnoreCase("solaris")) {
	    BUFFER_SIZE = 32 * KB;
	}
    }

    private Writer _writer;

    /**
     * Initializes a WriterOutputBuffer by creating an instance of a 
     * BufferedWriter. The size of the buffer in this writer may have 
     * a significant impact on throughput. Solaris prefers a larger
     * buffer, while Linux works better with a smaller one.
     */
    public WriterOutputBuffer(Writer writer) {
	_writer = new BufferedWriter(writer, BUFFER_SIZE);
    }

    public String close() {
	try {
	    _writer.flush();
	}
	catch (IOException e) {
	    throw new RuntimeException(e.toString());
	}
	return "";
    }

    public OutputBuffer append(String s) {
	try {
	    _writer.write(s);
	}
	catch (IOException e) {
	    throw new RuntimeException(e.toString());
	}
	return this;
    }

    public OutputBuffer append(char[] s, int from, int to) {
	try {
	    _writer.write(s, from, to);
	}
	catch (IOException e) {
	    throw new RuntimeException(e.toString());
	}
	return this;
    }

    public OutputBuffer append(char ch) {
	try {
	    _writer.write(ch);
	}
	catch (IOException e) {
	    throw new RuntimeException(e.toString());
	}
	return this;
    }
}