/*

 * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.

 */

/*

 * 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 com.sun.org.apache.xalan.internal.xsltc.runtime.output;

import java.io.BufferedWriter;

import java.io.IOException;

import java.io.Writer;

import jdk.xml.internal.SecuritySupport;

/**

 * @author Santiago Pericas-Geertsen

 * @LastModified: Sep 2017

 */

class WriterOutputBuffer implements OutputBuffer {

    private static final int KB = 1024;

    private static int BUFFER_SIZE = 4 * 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.

     */

    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;

    }

}