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/*
 * The MIT License
 *
 * Copyright (c) 2009-2023 PrimeTek Informatics
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.primefaces.util;

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

public class FastStringWriter extends Writer {

    protected StringBuilder builder;

    public FastStringWriter() {
        builder = new StringBuilder();
    }

    public FastStringWriter(int initialCapacity) {
        if (initialCapacity < 0) {
            throw new IllegalArgumentException();
        }

        builder = new StringBuilder(initialCapacity);
    }

    @Override
    public void write(char[] cbuf, int off, int len) throws IOException {
        if ((off < 0) || (off > cbuf.length) || (len < 0)
                || ((off + len) > cbuf.length) || ((off + len) < 0)) {
            throw new IndexOutOfBoundsException();
        }
        else if (len == 0) {
            return;
        }

        builder.append(cbuf, off, len);
    }

    @Override
    public void flush() throws IOException {
    }

    @Override
    public void close() throws IOException {
    }

    @Override
    public void write(String str) {
        builder.append(str);
    }

    @Override
    public void write(String str, int off, int len) {
        builder.append(str.substring(off, off + len));
    }

    public StringBuilder getBuffer() {
        return builder;
    }

    @Override
    public String toString() {
        return builder.toString();
    }

    public void reset() {
        builder.setLength(0);
    }
}