svgresponsewriter.java

一个比较好的jsf spring hibernate的例子

            }
        } else {
            writer.write(" ");
            writer.write(name);
            writer.write("=\"");

            // write the attribute value
            Util.writeAttribute(writer, buffer, value.toString());
            writer.write("\"");
        }
    }


    /**
     * <p>Write a properly encoded URI attribute name and the corresponding
     * value. The value text will be converted to a String if necessary).
     * This method may only be called after a call to
     * <code>startElement()</code>, and before the opened element has been
     * closed.</p>
     *
     * @param name                  Attribute name to be added
     * @param value                 Attribute value to be added
     * @param componentPropertyName The name of the component property to
     *                              which this attribute argument applies.  This argument may be
     *                              <code>null</code>.
     *
     * @throws IllegalStateException if this method is called when there
     *                               is no currently open element
     * @throws IOException           if an input/output error occurs
     * @throws NullPointerException  if <code>name</code> or
     *                               <code>value</code> is <code>null</code>
     */
    public void writeURIAttribute(String name, Object value,
                                  String componentPropertyName)
          throws IOException {
        if (name == null || value == null) {
            // PENDING i18n
            throw new NullPointerException(
                  "Argument Error: One or more parameters are null.");
        }

        writer.write(" ");
        writer.write(name);
        writer.write("=\"");

        String strValue = value.toString(); //TODO: Use converter for value?
        writer.write(' ');
        writer.write(name);
        writer.write("=\"" + strValue + "\"");
    }


    /**
     * <p>Write a comment string containing the specified text.
     * The text will be converted to a String if necessary.
     * If there is an open element that has been created by a call
     * to <code>startElement()</code>, that element will be closed
     * first.</p>
     *
     * @param comment Text content of the comment
     *
     * @throws IOException          if an input/output error occurs
     * @throws NullPointerException if <code>comment</code>
     *                              is <code>null</code>
     */
    public void writeComment(Object comment) throws IOException {
        if (comment == null) {
            // PENDING i18n
            throw new NullPointerException(
                  "Argument Error: One or more parameters are null.");
        }
        closeStartIfNecessary();
        writer.write("<!-- ");
        writer.write(comment.toString());
        writer.write(" -->");
    }


    /**
     * <p>Write a properly escaped object. The object will be converted
     * to a String if necessary.  If there is an open element
     * that has been created by a call to <code>startElement()</code>,
     * that element will be closed first.</p>
     *
     * @param text                  Text to be written
     * @param componentPropertyName The name of the component property to
     *                              which this text argument applies.  This argument may be <code>null</code>.
     *
     * @throws IOException          if an input/output error occurs
     * @throws NullPointerException if <code>text</code>
     *                              is <code>null</code>
     */
    public void writeText(Object text, String componentPropertyName)
          throws IOException {
        if (text == null) {
            // PENDING i18n
            throw new NullPointerException(
                  "Argument Error: One or more parameters are null.");
        }
        closeStartIfNecessary();
        if (dontEscape) {
            writer.write(text.toString());
        } else {
            Util.writeText(writer, buffer, text.toString());
        }
    }


    /**
     * <p>Write a properly escaped single character, If there
     * is an open element that has been created by a call to
     * <code>startElement()</code>, that element will be closed first.</p>
     * <p/>
     * <p>All angle bracket occurrences in the argument must be escaped
     * using the &amp;gt; &amp;lt; syntax.</p>
     *
     * @param text Text to be written
     *
     * @throws IOException if an input/output error occurs
     */
    public void writeText(char text) throws IOException {
        closeStartIfNecessary();
        if (dontEscape) {
            writer.write(text);
        } else {
            charHolder[0] = text;
            Util.writeText(writer, buffer, charHolder);
        }
    }


    /**
     * <p>Write properly escaped text from a character array.
     * The output from this command is identical to the invocation:
     * <code>writeText(c, 0, c.length)</code>.
     * If there is an open element that has been created by a call to
     * <code>startElement()</code>, that element will be closed first.</p>
     * </p>
     * <p/>
     * <p>All angle bracket occurrences in the argument must be escaped
     * using the &amp;gt; &amp;lt; syntax.</p>
     *
     * @param text Text to be written
     *
     * @throws IOException          if an input/output error occurs
     * @throws NullPointerException if <code>text</code>
     *                              is <code>null</code>
     */
    public void writeText(char text[]) throws IOException {
        if (text == null) {
            // PENDING i18n
            throw new NullPointerException(
                  "Argument Error: One or more parameters are null.");
        }
        closeStartIfNecessary();
        if (dontEscape) {
            writer.write(text);
        } else {
            Util.writeText(writer, buffer, text);
        }
    }


    /**
     * <p>Write properly escaped text from a character array.
     * If there is an open element that has been created by a call
     * to <code>startElement()</code>, that element will be closed
     * first.</p>
     * <p/>
     * <p>All angle bracket occurrences in the argument must be escaped
     * using the &amp;gt; &amp;lt; syntax.</p>
     *
     * @param text Text to be written
     * @param off  Starting offset (zero-relative)
     * @param len  Number of characters to be written
     *
     * @throws IndexOutOfBoundsException if the calculated starting or
     *                                   ending position is outside the bounds of the character array
     * @throws IOException               if an input/output error occurs
     * @throws NullPointerException      if <code>text</code>
     *                                   is <code>null</code>
     */
    public void writeText(char text[], int off, int len)
          throws IOException {
        if (text == null) {
            // PENDING i18n
            throw new NullPointerException(
                  "Argument Error: One or more parameters are null.");
        }
        if (off < 0 || off > text.length || len < 0 || len > text.length) {
            throw new IndexOutOfBoundsException();
        }
        closeStartIfNecessary();
        if (dontEscape) {
            writer.write(text, off, len);
        } else {
            Util.writeText(writer, buffer, text, off, len);
        }
    }


    /**
     * <p>Create a new instance of this <code>ResponseWriter</code> using
     * a different <code>Writer</code>.
     *
     * @param writer The <code>Writer</code> that will be used to create
     *               another <code>ResponseWriter</code>.
     */
    public ResponseWriter cloneWithWriter(Writer writer) {
        try {
            return new SVGResponseWriter(writer, getContentType(),
                                         getCharacterEncoding());
        } catch (FacesException e) {
            // This should never happen
            throw new IllegalStateException();
        }
    }


    /**
     * This method automatically closes a previous element (if not
     * already closed).
     */
    private void closeStartIfNecessary() throws IOException {
        if (closeStart) {
            writer.write(">");
            closeStart = false;
        }
    }


    /** Methods From <code>java.io.Writer</code> */

    public void close() throws IOException {
        closeStartIfNecessary();
        writer.close();
    }


    public void write(char cbuf) throws IOException {
        closeStartIfNecessary();
        writer.write(cbuf);
    }


    public void write(char[] cbuf, int off, int len) throws IOException {
        closeStartIfNecessary();
        writer.write(cbuf, off, len);
    }


    public void write(int c) throws IOException {
        closeStartIfNecessary();
        writer.write(c);
    }


    public void write(String str) throws IOException {
        closeStartIfNecessary();
        writer.write(str);
    }


    public void write(String str, int off, int len) throws IOException {
        closeStartIfNecessary();
        writer.write(str, off, len);
    }
}