jspwriterimpl.java

业界著名的tomcat服务器的最新6.0的源代码。

     * Write an array of characters.  This method cannot be inherited from the
     * Writer class because it must suppress I/O exceptions.
     */
    public void write(char buf[]) throws IOException {
        write(buf, 0, buf.length);
    }
    
    /**
     * Write a portion of a String.
     *
     * @param  s     String to be written
     * @param  off   Offset from which to start reading characters
     * @param  len   Number of characters to be written
     */
    public void write(String s, int off, int len) throws IOException {
        ensureOpen();
        if (bufferSize == 0) {
            initOut();
            out.write(s, off, len);
            return;
        }
        int b = off, t = off + len;
        while (b < t) {
            int d = min(bufferSize - nextChar, t - b);
            s.getChars(b, b + d, cb, nextChar);
            b += d;
            nextChar += d;
            if (nextChar >= bufferSize) 
                if (autoFlush)
                    flushBuffer();
                else
                    bufferOverflow();
        }
    }
    
    /**
     * Write a string.  This method cannot be inherited from the Writer class
     * because it must suppress I/O exceptions.
     */
    public void write(String s) throws IOException {
        // Simple fix for Bugzilla 35410
        // Calling the other write function so as to init the buffer anyways
        if(s == null) {
            write(s, 0, 0);
        } else {
            write(s, 0, s.length());
        }
    }
    
    
    static String lineSeparator = System.getProperty("line.separator");
    
    /**
     * Write a line separator.  The line separator string is defined by the
     * system property <tt>line.separator</tt>, and is not necessarily a single
     * newline ('\n') character.
     *
     * @exception  IOException  If an I/O error occurs
     */
    
    public void newLine() throws IOException {
        write(lineSeparator);
    }
    
    
    /* Methods that do not terminate lines */
    
    /**
     * Print a boolean value.  The string produced by <code>{@link
     * java.lang.String#valueOf(boolean)}</code> is translated into bytes
     * according to the platform's default character encoding, and these bytes
     * are written in exactly the manner of the <code>{@link
     * #write(int)}</code> method.
     *
     * @param      b   The <code>boolean</code> to be printed
     */
    public void print(boolean b) throws IOException {
        write(b ? "true" : "false");
    }
    
    /**
     * Print a character.  The character is translated into one or more bytes
     * according to the platform's default character encoding, and these bytes
     * are written in exactly the manner of the <code>{@link
     * #write(int)}</code> method.
     *
     * @param      c   The <code>char</code> to be printed
     */
    public void print(char c) throws IOException {
        write(String.valueOf(c));
    }
    
    /**
     * Print an integer.  The string produced by <code>{@link
     * java.lang.String#valueOf(int)}</code> is translated into bytes according
     * to the platform's default character encoding, and these bytes are
     * written in exactly the manner of the <code>{@link #write(int)}</code>
     * method.
     *
     * @param      i   The <code>int</code> to be printed
     */
    public void print(int i) throws IOException {
        write(String.valueOf(i));
    }
    
    /**
     * Print a long integer.  The string produced by <code>{@link
     * java.lang.String#valueOf(long)}</code> is translated into bytes
     * according to the platform's default character encoding, and these bytes
     * are written in exactly the manner of the <code>{@link #write(int)}</code>
     * method.
     *
     * @param      l   The <code>long</code> to be printed
     */
    public void print(long l) throws IOException {
        write(String.valueOf(l));
    }
    
    /**
     * Print a floating-point number.  The string produced by <code>{@link
     * java.lang.String#valueOf(float)}</code> is translated into bytes
     * according to the platform's default character encoding, and these bytes
     * are written in exactly the manner of the <code>{@link #write(int)}</code>
     * method.
     *
     * @param      f   The <code>float</code> to be printed
     */
    public void print(float f) throws IOException {
        write(String.valueOf(f));
    }
    
    /**
     * Print a double-precision floating-point number.  The string produced by
     * <code>{@link java.lang.String#valueOf(double)}</code> is translated into
     * bytes according to the platform's default character encoding, and these
     * bytes are written in exactly the manner of the <code>{@link
     * #write(int)}</code> method.
     *
     * @param      d   The <code>double</code> to be printed
     */
    public void print(double d) throws IOException {
        write(String.valueOf(d));
    }
    
    /**
     * Print an array of characters.  The characters are converted into bytes
     * according to the platform's default character encoding, and these bytes
     * are written in exactly the manner of the <code>{@link #write(int)}</code>
     * method.
     *
     * @param      s   The array of chars to be printed
     *
     * @throws  NullPointerException  If <code>s</code> is <code>null</code>
     */
    public void print(char s[]) throws IOException {
        write(s);
    }
    
    /**
     * Print a string.  If the argument is <code>null</code> then the string
     * <code>"null"</code> is printed.  Otherwise, the string's characters are
     * converted into bytes according to the platform's default character
     * encoding, and these bytes are written in exactly the manner of the
     * <code>{@link #write(int)}</code> method.
     *
     * @param      s   The <code>String</code> to be printed
     */
    public void print(String s) throws IOException {
        if (s == null) {
            s = "null";
        }
        write(s);
    }
    
    /**
     * Print an object.  The string produced by the <code>{@link
     * java.lang.String#valueOf(Object)}</code> method is translated into bytes
     * according to the platform's default character encoding, and these bytes
     * are written in exactly the manner of the <code>{@link #write(int)}</code>
     * method.
     *
     * @param      obj   The <code>Object</code> to be printed
     */
    public void print(Object obj) throws IOException {
        write(String.valueOf(obj));
    }
    
    /* Methods that do terminate lines */
    
    /**
     * Terminate the current line by writing the line separator string.  The
     * line separator string is defined by the system property
     * <code>line.separator</code>, and is not necessarily a single newline
     * character (<code>'\n'</code>).
     *
     * Need to change this from PrintWriter because the default
     * println() writes  to the sink directly instead of through the
     * write method...  
     */
    public void println() throws IOException {
        newLine();
    }
    
    /**
     * Print a boolean value and then terminate the line.  This method behaves
     * as though it invokes <code>{@link #print(boolean)}</code> and then
     * <code>{@link #println()}</code>.
     */
    public void println(boolean x) throws IOException {
        print(x);
        println();
    }
    
    /**
     * Print a character and then terminate the line.  This method behaves as
     * though it invokes <code>{@link #print(char)}</code> and then <code>{@link
     * #println()}</code>.
     */
    public void println(char x) throws IOException {
        print(x);
        println();
    }
    
    /**
     * Print an integer and then terminate the line.  This method behaves as
     * though it invokes <code>{@link #print(int)}</code> and then <code>{@link
     * #println()}</code>.
     */
    public void println(int x) throws IOException {
        print(x);
        println();
    }
    
    /**
     * Print a long integer and then terminate the line.  This method behaves
     * as though it invokes <code>{@link #print(long)}</code> and then
     * <code>{@link #println()}</code>.
     */
    public void println(long x) throws IOException {
        print(x);
        println();
    }
    
    /**
     * Print a floating-point number and then terminate the line.  This method
     * behaves as though it invokes <code>{@link #print(float)}</code> and then
     * <code>{@link #println()}</code>.
     */
    public void println(float x) throws IOException {
        print(x);
        println();
    }
    
    /**
     * Print a double-precision floating-point number and then terminate the
     * line.  This method behaves as though it invokes <code>{@link
     * #print(double)}</code> and then <code>{@link #println()}</code>.
     */
    public void println(double x) throws IOException {
        print(x);
        println();
    }
    
    /**
     * Print an array of characters and then terminate the line.  This method
     * behaves as though it invokes <code>{@link #print(char[])}</code> and then
     * <code>{@link #println()}</code>.
     */
    public void println(char x[]) throws IOException {
        print(x);
        println();
    }
    
    /**
     * Print a String and then terminate the line.  This method behaves as
     * though it invokes <code>{@link #print(String)}</code> and then
     * <code>{@link #println()}</code>.
     */
    public void println(String x) throws IOException {
        print(x);
        println();
    }
    
    /**
     * Print an Object and then terminate the line.  This method behaves as
     * though it invokes <code>{@link #print(Object)}</code> and then
     * <code>{@link #println()}</code>.
     */
    public void println(Object x) throws IOException {
        print(x);
        println();
    }
    
}