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/**
 * Copyright 2018 jianggujin (www.jianggujin.com).
 * 
 * Licensed 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.jianggujin.http.util;

import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;

/**
 * 输出流，支持字节字符输出
 * 
 * @author jianggujin
 *
 */
public class JOutputStream extends BufferedOutputStream {
    private String charset = JDataUtils.DEFAULT_CHARSET;

    public JOutputStream(OutputStream out) {
        super(out);
    }

    public JOutputStream(OutputStream out, String charset) {
        super(out);
        if (!Charset.isSupported(charset)) {
            throw new IllegalArgumentException("not support charset [" + charset + "]");
        }
        this.charset = charset;
    }

    public JOutputStream(OutputStream out, int size) {
        super(out, size);
    }

    /**
     * 获得字符编码
     * 
     * @return
     */
    public String getCharset() {
        return charset;
    }

    /**
     * 设置字符编码
     * 
     * @param charset
     */
    public void setCharset(String charset) {
        this.charset = charset;
    }

    /**
     * 写入字符
     * 
     * @param c
     * @throws IOException
     */
    public void write(char c) throws IOException {
        this.write(new char[] { c });
    }

    /**
     * 写入字符数组
     * 
     * @param c
     * @throws IOException
     */
    public void write(char[] c) throws IOException {
        this.write(c, 0, c.length);
    }

    /**
     * 写入字符数组
     * 
     * @param cbuf
     * @param off
     * @param len
     * @throws IOException
     */
    public void write(char[] cbuf, int off, int len) throws IOException {
        // this.write(Charset.forName(charset).encode(CharBuffer.wrap(cbuf, off,
        // len)));
        this.write(new String(cbuf, off, len));
    }

    /**
     * 写入字符序列
     * 
     * @param cs
     * @throws IOException
     */
    public void write(CharSequence cs) throws IOException {
        this.write(cs.toString().getBytes(charset));
        // this.write(cs, 0, cs.length());
    }

    /**
     * 写入字符序列
     * 
     * @param cs
     * @param off
     * @param len
     * @throws IOException
     */
    public void write(CharSequence cs, int off, int len) throws IOException {
        // this.write(Charset.forName(charset).encode(CharBuffer.wrap(cs, off,
        // len)));
        this.write(cs.subSequence(off, len));
    }

    /**
     * 写入字节缓冲区
     * 
     * @param buffer
     * @throws IOException
     */
    public void write(ByteBuffer buffer) throws IOException {
        this.write(buffer.array());
    }
}