com.youthlin.mvc.servlet.NoBodyOutputStream Maven / Gradle / Ivy

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package com.youthlin.mvc.servlet;

import javax.servlet.ServletOutputStream;
import javax.servlet.WriteListener;
import java.io.IOException;
import java.text.MessageFormat;
import java.util.ResourceBundle;

/**
 * Servlet output stream that gobbles up all its data.
 * 
 * 创建：youthlin.chen
 * 时间：2017-08-17 00:27
 *
 * @see javax.servlet.http.HttpServlet
 */
class NoBodyOutputStream extends ServletOutputStream {
    private static final String LSTRING_FILE = "javax.servlet.http.LocalStrings";
    private static ResourceBundle lStrings = ResourceBundle.getBundle(LSTRING_FILE);

    private int contentLength = 0;

    // file private
    NoBodyOutputStream() {
    }

    // file private
    int getContentLength() {
        return contentLength;
    }

    @Override
    public void write(int b) {
        contentLength++;
    }

    @Override
    public void write(byte buf[], int offset, int len) throws IOException {
        if (buf == null) {
            throw new NullPointerException(lStrings.getString("err.io.nullArray"));
        }
        if (offset < 0 || len < 0 || offset + len > buf.length) {
            String msg = lStrings.getString("err.io.indexOutOfBounds");
            Object[] msgArgs = new Object[3];
            msgArgs[0] = offset;
            msgArgs[1] = len;
            msgArgs[2] = buf.length;
            msg = MessageFormat.format(msg, msgArgs);
            throw new IndexOutOfBoundsException(msg);
        }
        contentLength += len;
    }

    public boolean isReady() {
        return false;
    }

    public void setWriteListener(WriteListener writeListener) {
    }
}