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package com.jchanghong.core.io.resource;

import com.jchanghong.core.io.IORuntimeException;
import com.jchanghong.core.util.StrUtil;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.Serializable;
import java.io.StringReader;
import java.net.URL;
import java.nio.charset.Charset;

/**
 * 基于byte[]的资源获取器

 * 注意：此对象中getUrl方法始终返回null
 * 
 * @author looly
 * @since 4.0.9
 */
public class BytesResource implements Resource, Serializable {
	private static final long serialVersionUID = 1L;

	private final byte[] bytes;
	private final String name;

	/**
	 * 构造
	 * 
	 * @param bytes 字节数组
	 */
	public BytesResource(byte[] bytes) {
		this(bytes, null);
	}
	
	/**
	 * 构造
	 * 
	 * @param bytes 字节数组
	 * @param name 资源名称
	 */
	public BytesResource(byte[] bytes, String name) {
		this.bytes = bytes;
		this.name = name;
	}
	
	@Override
	public String getName() {
		return this.name;
	}

	@Override
	public URL getUrl() {
		return null;
	}

	@Override
	public InputStream getStream() {
		return new ByteArrayInputStream(this.bytes);
	}

	@Override
	public BufferedReader getReader(Charset charset) {
		return new BufferedReader(new StringReader(readStr(charset)));
	}

	@Override
	public String readStr(Charset charset) throws IORuntimeException {
		return StrUtil.str(this.bytes, charset);
	}

	@Override
	public byte[] readBytes() throws IORuntimeException {
		return this.bytes;
	}

}