Source Code : XMLWriter helper class

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XMLWriter helper class

 
<font color="#3f7f5f">/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */</font>


<font color="#7f0055"><b>import</b></font> java.io.IOException;
<font color="#7f0055"><b>import</b></font> java.io.Writer;

<font color="#3f7f5f">/**
 * XMLWriter helper class.
 *
 * @author <a href="mailto:remm@apache.org">Remy Maucherat</a>
 */</font>
<font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>class</b></font> XMLWriter {


    <font color="#3f7f5f">// -------------------------------------------------------------- Constants
</font>

    <font color="#3f7f5f">/**
     * Opening tag.
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>static</b></font> <font color="#7f0055"><b>final</b></font> <font color="#7f0055"><b>int</b></font> OPENING = 0;


    <font color="#3f7f5f">/**
     * Closing tag.
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>static</b></font> <font color="#7f0055"><b>final</b></font> <font color="#7f0055"><b>int</b></font> CLOSING = 1;


    <font color="#3f7f5f">/**
     * Element with no content.
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>static</b></font> <font color="#7f0055"><b>final</b></font> <font color="#7f0055"><b>int</b></font> NO_CONTENT = 2;


    <font color="#3f7f5f">// ----------------------------------------------------- Instance Variables
</font>

    <font color="#3f7f5f">/**
     * Buffer.
     */</font>
    <font color="#7f0055"><b>protected</b></font> StringBuffer buffer = <font color="#7f0055"><b>new</b></font> StringBuffer();


    <font color="#3f7f5f">/**
     * Writer.
     */</font>
    <font color="#7f0055"><b>protected</b></font> Writer writer = null;


    <font color="#3f7f5f">// ----------------------------------------------------------- Constructors
</font>

    <font color="#3f7f5f">/**
     * Constructor.
     */</font>
    <font color="#7f0055"><b>public</b></font> XMLWriter() {
    }


    <font color="#3f7f5f">/**
     * Constructor.
     */</font>
    <font color="#7f0055"><b>public</b></font> XMLWriter(Writer writer) {
        this.writer = writer;
    }


    <font color="#3f7f5f">// --------------------------------------------------------- Public Methods
</font>

    <font color="#3f7f5f">/**
     * Retrieve generated XML.
     *
     * @return String containing the generated XML
     */</font>
    <font color="#7f0055"><b>public</b></font> String toString() {
        <font color="#7f0055"><b>return</b></font> buffer.toString();
    }


    <font color="#3f7f5f">/**
     * Write property to the XML.
     *
     * @param namespace Namespace
     * @param namespaceInfo Namespace info
     * @param name Property name
     * @param value Property value
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>void</b></font> writeProperty(String namespace, String namespaceInfo,
                              String name, String value) {
        writeElement(namespace, namespaceInfo, name, OPENING);
        buffer.append(value);
        writeElement(namespace, namespaceInfo, name, CLOSING);

    }


    <font color="#3f7f5f">/**
     * Write property to the XML.
     *
     * @param namespace Namespace
     * @param name Property name
     * @param value Property value
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>void</b></font> writeProperty(String namespace, String name, String value) {
        writeElement(namespace, name, OPENING);
        buffer.append(value);
        writeElement(namespace, name, CLOSING);
    }


    <font color="#3f7f5f">/**
     * Write property to the XML.
     *
     * @param namespace Namespace
     * @param name Property name
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>void</b></font> writeProperty(String namespace, String name) {
        writeElement(namespace, name, NO_CONTENT);
    }


    <font color="#3f7f5f">/**
     * Write an element.
     *
     * @param name Element name
     * @param namespace Namespace abbreviation
     * @param type Element type
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>void</b></font> writeElement(String namespace, String name, <font color="#7f0055"><b>int</b></font> type) {
        writeElement(namespace, null, name, type);
    }


    <font color="#3f7f5f">/**
     * Write an element.
     *
     * @param namespace Namespace abbreviation
     * @param namespaceInfo Namespace info
     * @param name Element name
     * @param type Element type
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>void</b></font> writeElement(String namespace, String namespaceInfo,
                             String name, <font color="#7f0055"><b>int</b></font> type) {
        <font color="#7f0055"><b>if</b></font> ((namespace != null) && (namespace.length() > 0)) {
            <font color="#7f0055"><b>switch</b></font> (type) {
            <font color="#7f0055"><b>case</b></font> OPENING:
                <font color="#7f0055"><b>if</b></font> (namespaceInfo != null) {
                    buffer.append(<font color="#2a00ff">"<"</font> + namespace + <font color="#2a00ff">":"</font> + name + <font color="#2a00ff">" xmlns:"</font>
                                  + namespace + <font color="#2a00ff">"=""</font>
                                  + namespaceInfo + <font color="#2a00ff">"">"</font>);
                } <font color="#7f0055"><b>else</b></font> {
                    buffer.append(<font color="#2a00ff">"<"</font> + namespace + <font color="#2a00ff">":"</font> + name + <font color="#2a00ff">">"</font>);
                }
                <font color="#7f0055"><b>break</b></font>;
            <font color="#7f0055"><b>case</b></font> CLOSING:
                buffer.append(<font color="#2a00ff">"</"</font> + namespace + <font color="#2a00ff">":"</font> + name + <font color="#2a00ff">">
"</font>);
                <font color="#7f0055"><b>break</b></font>;
            <font color="#7f0055"><b>case</b></font> NO_CONTENT:
            <font color="#7f0055"><b>default</b></font>:
                <font color="#7f0055"><b>if</b></font> (namespaceInfo != null) {
                    buffer.append(<font color="#2a00ff">"<"</font> + namespace + <font color="#2a00ff">":"</font> + name + <font color="#2a00ff">" xmlns:"</font>
                                  + namespace + <font color="#2a00ff">"=""</font>
                                  + namespaceInfo + <font color="#2a00ff">""/>"</font>);
                } <font color="#7f0055"><b>else</b></font> {
                    buffer.append(<font color="#2a00ff">"<"</font> + namespace + <font color="#2a00ff">":"</font> + name + <font color="#2a00ff">"/>"</font>);
                }
                <font color="#7f0055"><b>break</b></font>;
            }
        } <font color="#7f0055"><b>else</b></font> {
            <font color="#7f0055"><b>switch</b></font> (type) {
            <font color="#7f0055"><b>case</b></font> OPENING:
                buffer.append(<font color="#2a00ff">"<"</font> + name + <font color="#2a00ff">">"</font>);
                <font color="#7f0055"><b>break</b></font>;
            <font color="#7f0055"><b>case</b></font> CLOSING:
                buffer.append(<font color="#2a00ff">"</"</font> + name + <font color="#2a00ff">">
"</font>);
                <font color="#7f0055"><b>break</b></font>;
            <font color="#7f0055"><b>case</b></font> NO_CONTENT:
            <font color="#7f0055"><b>default</b></font>:
                buffer.append(<font color="#2a00ff">"<"</font> + name + <font color="#2a00ff">"/>"</font>);
                <font color="#7f0055"><b>break</b></font>;
            }
        }
    }


    <font color="#3f7f5f">/**
     * Write text.
     *
     * @param text Text to append
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>void</b></font> writeText(String text) {
        buffer.append(text);
    }


    <font color="#3f7f5f">/**
     * Write data.
     *
     * @param data Data to append
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>void</b></font> writeData(String data) {
        buffer.append(data);
    }


    <font color="#3f7f5f">/**
     * Write XML Header.
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>void</b></font> writeXMLHeader() {
        buffer.append(<font color="#2a00ff">"<?xml version="1.0" encoding="utf-8" ?>
"</font>);
    }


    <font color="#3f7f5f">/**
     * Send data and reinitializes buffer.
     */</font>
    <font color="#7f0055"><b>public</b></font> <font color="#7f0055"><b>void</b></font> sendData()
        <font color="#7f0055"><b>throws</b></font> IOException {
        <font color="#7f0055"><b>if</b></font> (writer != null) {
            writer.write(buffer.toString());
            buffer = <font color="#7f0055"><b>new</b></font> StringBuffer();
        }
    }


}

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