Java tutorial
/** * Copyright (c) 2009 Juwi MacMillan Group GmbH * * Licensed 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. */ package org.tizzit.util.xml; import java.io.StringReader; import javax.xml.transform.OutputKeys; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerFactory; import javax.xml.transform.sax.SAXResult; import javax.xml.transform.stream.StreamSource; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.xml.sax.Attributes; import org.xml.sax.ContentHandler; import org.xml.sax.SAXException; import org.xml.sax.helpers.AttributesImpl; import org.xml.sax.helpers.DefaultHandler; /** * <p>Title: ConQuest</p> * <p>Description: Enterprise Content Management</p> * <p>Copyright: Copyright (c) 2004</p> * * <b>Namespace support since 14.10.2009</b> * * @author <a href="sascha.kulawik@juwimm.com">Sascha-Matthias Kulawik</a> * @author <a href="mailto:eduard.siebert@juwimm.com">Eduard Siebert</a> * @version $Revision: 1.32 $ */ public final class SAXHelper { private static final Log log = LogFactory.getLog(SAXHelper.class); private SAXHelper() { } /** * @since tizzit-common 15.10.2009 */ public static void addElement(ContentHandler handler, String namespaceUri, String elementName, String elementValue, Attributes attr) throws SAXException { if (elementName != null) { handler.startElement(namespaceUri, elementName, elementName, attr); String saveVal = (elementValue == null) ? "" : elementValue; char[] ca = saveVal.toCharArray(); handler.characters(ca, 0, ca.length); handler.endElement(namespaceUri, elementName, elementName); } } public static void addElement(ContentHandler handler, String elementName, String elementValue) throws SAXException { addElement(handler, "", elementName, elementValue); } public static void addElement(ContentHandler handler, String elementName, Integer elementValue) throws SAXException { addElement(handler, "", elementName, elementValue); } public static void addElement(ContentHandler handler, String elementName, Boolean elementValue) throws SAXException { addElement(handler, "", elementName, elementValue); } /** * @since tizzit-common 15.10.2009 */ public static void addElement(ContentHandler handler, String namespaceUri, String elementName, String elementValue) throws SAXException { addElement(handler, namespaceUri, elementName, elementValue, new AttributesImpl()); } /** * @since tizzit-common 15.10.2009 */ public static void addElement(ContentHandler handler, String namespaceUri, String elementName, Integer elementValue) throws SAXException { String saveVal = (elementValue == null) ? "" : elementValue.toString(); addElement(handler, namespaceUri, elementName, saveVal, new AttributesImpl()); } /** * @since tizzit-common 15.10.2009 */ public static void addElement(ContentHandler handler, String namespaceUri, String elementName, Boolean elementValue) throws SAXException { String saveVal = (elementValue == null) ? "" : elementValue.toString(); addElement(handler, namespaceUri, elementName, saveVal, new AttributesImpl()); } /** * Sets an attribute of an SAX AttributesImpl to a specific value.<br/> * If it exists, the value will be overwritten. * * @param attr The AttributesImpl * @param attrName The name * @param attrValue The (new) value */ public static void setSAXAttr(AttributesImpl attr, String attrName, String attrValue) { setSAXAttr(attr, "", attrName, attrValue); } /** * Sets an attribute of an SAX AttributesImpl to a specific value (namespace supported).<br/> * If it exists, the value will be overwritten. * * @param attr The AttributesImpl * @param namespaceUri * @param attrName The name * @param attrValue The (new) value * @since tizzit-common 15.10.2009 */ public static void setSAXAttr(AttributesImpl attr, String namespaceUri, String attrName, String attrValue) { if (attrName != null) { int idx = attr.getIndex(attrName); String saveVal = (attrValue == null) ? "" : attrValue; if (idx >= 0) { String dd = attr.getType(attrName); attr.setAttribute(idx, namespaceUri, attrName, attrName, dd, saveVal); } else { attr.addAttribute(namespaceUri, attrName, attrName, "CDATA", saveVal); } } } /** * @param node the string to stream. * @param handler the content handler. * @since tizzit-common 15.10.2009 */ public static void string2sax(String node, ContentHandler handler) { try { Transformer t = TransformerFactory.newInstance().newTransformer(); t.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); t.setOutputProperty(OutputKeys.STANDALONE, "no"); t.setOutputProperty(OutputKeys.METHOD, "xml"); StreamSource source = new StreamSource(new StringReader(node)); SAXResult result = new SAXResult(new OmitXmlDeclarationContentHandler(handler)); t.transform(source, result); } catch (Exception exe) { log.error("unknown error occured", exe); } } /** * @param node the string to stream. * @param handler the content handler. * @since tizzit-common 15.10.2009 */ public static void string2sax(String node, ContentHandler handler, String encoding) { try { Transformer t = TransformerFactory.newInstance().newTransformer(); t.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); t.setOutputProperty(OutputKeys.STANDALONE, "no"); t.setOutputProperty(OutputKeys.METHOD, "xml"); if (!"".equals(encoding) && encoding != null) { t.setOutputProperty(OutputKeys.ENCODING, encoding); } StreamSource source = new StreamSource(new StringReader(node)); SAXResult result = new SAXResult(new OmitXmlDeclarationContentHandler(handler)); t.transform(source, result); } catch (Exception exe) { log.error("unknown error occured", exe); } } /** * This ContentHandler is to remove the xml Header. The OMIT_XML_DECLARATION does not work actually. * * @author <a href="mailto:j2ee@juwimm.com">Sascha-Matthias Kulawik</a> * company Juwi|MacMillan Group GmbH, Walsrode, Germany * @version $Id$ * @since tizzit-common 15.10.2009 */ public static class OmitXmlDeclarationContentHandler extends DefaultHandler implements ContentHandler { private ContentHandler parent; public OmitXmlDeclarationContentHandler(ContentHandler parent) { this.parent = parent; } @Override public void endDocument() throws SAXException { } @Override public void startDocument() throws SAXException { } @Override public void characters(char[] arg0, int arg1, int arg2) throws SAXException { parent.characters(arg0, arg1, arg2); } @Override public void endElement(String arg0, String arg1, String arg2) throws SAXException { parent.endElement(arg0, arg1, arg2); } @Override public void endPrefixMapping(String arg0) throws SAXException { parent.endPrefixMapping(arg0); } @Override public void ignorableWhitespace(char[] arg0, int arg1, int arg2) throws SAXException { parent.ignorableWhitespace(arg0, arg1, arg2); } @Override public void processingInstruction(String arg0, String arg1) throws SAXException { parent.processingInstruction(arg0, arg1); } @Override public void skippedEntity(String arg0) throws SAXException { parent.skippedEntity(arg0); } @Override public void startElement(String arg0, String arg1, String arg2, Attributes arg3) throws SAXException { parent.startElement(arg0, arg1, arg2, arg3); } @Override public void startPrefixMapping(String arg0, String arg1) throws SAXException { parent.startPrefixMapping(arg0, arg1); } } }