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/*
 * This file is part of the DiffX library.
 *
 * For licensing information please see the file license.txt included in the release.
 * A copy of this licence can also be found at
 *   http://www.opensource.org/licenses/artistic-license-2.0.php
 */
package com.topologi.diffx.xml;

import java.io.IOException;
import java.io.StringWriter;

/**
 * An XML which writes on to a string.
 *
 * 

This XML writer is backed by a {@link StringWriter} and will defer the XML writer's method to * either a {@link XMLWriterImpl} or {@link XMLWriterNSImpl} depending on whether namespace support is * required. * *

The write methods do not throw any {@link IOException}. * *

If the write is not set to support namespaces, the method which require a namespace URI will * throw an {@link UnsupportedOperationException}. * * @author Christophe Lauret * @version 7 March 2012 */ public final class XMLStringWriter implements XMLWriter { /** * Wraps an XML Writer */ private final StringWriter writer; /** * Wraps an XML Writer */ private final XMLWriter xml; /** *

Creates a new XML string writer. * * @param namespaces Whether this XML writer should use namespaces. */ public XMLStringWriter(boolean namespaces) { this(namespaces, false); } /** *

Create a new XML string writer. * * @param namespaces Whether this XML writer should use namespaces. * @param indent Set the indentation flag. */ public XMLStringWriter(boolean namespaces, boolean indent) { this.writer = new StringWriter(); this.xml = namespaces? new XMLWriterNSImpl(this.writer, indent) : new XMLWriterImpl(this.writer, indent); } // XML Writer methods // ---------------------------------------------------------------------------------------------- @Override public void xmlDecl() { try { this.xml.xmlDecl(); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void setIndentChars(String spaces) { this.xml.setIndentChars(spaces); } @Override public void writeText(char c) { try { this.xml.writeText(c); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void writeText(String text) { try { this.xml.writeText(text); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void writeText(char[] text, int off, int len) { try { this.xml.writeText(text, off, len); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void writeCDATA(String cdata) { try { this.xml.writeCDATA(cdata); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void writeXML(String text) { try { this.xml.writeXML(text); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void writeXML(char[] text, int off, int len) { try { this.xml.writeXML(text, off, len); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void writeComment(String comment) { try { this.xml.writeComment(comment); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void writePI(String target, String data) { try { this.xml.writePI(target, data); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void openElement(String name) { try { this.xml.openElement(name); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void openElement(String name, boolean hasChildren) { try { this.xml.openElement(name, hasChildren); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void openElement(String uri, String name, boolean hasChildren) { try { this.xml.openElement(uri, name, hasChildren); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void closeElement() { try { this.xml.closeElement(); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void element(String name, String text) { try { this.xml.element(name, text); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void emptyElement(String element) { try { this.xml.emptyElement(element); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void emptyElement(String uri, String element) { try { this.xml.emptyElement(element); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void attribute(String name, String value) { try { this.xml.attribute(name, value); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void attribute(String name, int value) { try { this.xml.attribute(name, value); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void attribute(String uri, String name, String value) { try { this.xml.attribute(uri, name, value); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void attribute(String uri, String name, int value) { try { this.xml.attribute(uri, name, value); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void setPrefixMapping(String uri, String prefix) { this.xml.setPrefixMapping(uri, prefix); } @Override public void flush() { try { this.xml.flush(); } catch (IOException ex) { // Will not occur doNothing(); } } @Override public void close() throws UnclosedElementException { try { this.xml.close(); } catch (IOException ex) { // Will not occur doNothing(); } } /** * Returns the XML content as a {@link String}. * * @return the XML content as a {@link String}. */ @Override public String toString() { return this.writer.toString(); } /** * Do nothing */ private static void doNothing(){ } }





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