Java tutorial
/** * Copyright 2007-2010 ? * All rights reserved. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see http://www.gnu.org/licenses. * */ package org.fireflow.model.io.resource; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.Iterator; import java.util.List; import java.util.Map; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.OutputKeys; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerConfigurationException; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.apache.commons.lang.StringUtils; import org.fireflow.model.io.ModelElementNames; import org.fireflow.model.io.SerializerException; import org.fireflow.model.io.Util4Serializer; import org.fireflow.model.resourcedef.ResourceDef; import org.w3c.dom.CDATASection; import org.w3c.dom.Document; import org.w3c.dom.Element; /** * * * @author ? * @version 2.0 */ public class ResourceSerializer implements ModelElementNames { private static final String DEFAULT_CHARSET = "UTF-8"; private static final DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance(); private static String CDATA_SECTION_ELEMENT_LIST = ""; public static final String JDK_TRANSFORMER_CLASS = "com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl"; protected static boolean useJDKTransformerFactory = false;//??bug static { TransformerFactory transformerFactory = TransformerFactory.newInstance(); if (JDK_TRANSFORMER_CLASS.equals(transformerFactory.getClass().getName())) { useJDKTransformerFactory = true; } documentBuilderFactory.setNamespaceAware(true); StringBuffer buf = new StringBuffer(); buf.append("{").append(ModelElementNames.SERVICE_NS_URI).append("}").append(ModelElementNames.DESCRIPTION) .append(" ").append("{").append(ModelElementNames.SERVICE_NS_URI).append("}") .append(ModelElementNames.BODY).append(" ") .append("{").append(ModelElementNames.RESOURCE_NS_URI).append("}") .append(ModelElementNames.DESCRIPTION).append(" ").append("{") .append(ModelElementNames.RESOURCE_NS_URI).append("}").append(ModelElementNames.BODY).append(" "); CDATA_SECTION_ELEMENT_LIST = buf.toString(); } public static void writeResources(List<ResourceDef> resources, Element parentElement) throws SerializerException { Document document = parentElement.getOwnerDocument(); Element resourcesElement = document.createElementNS(RESOURCE_NS_URI, RESOURCE_NS_PREFIX + ":" + RESOURCES); parentElement.appendChild(resourcesElement); if (resources == null || resources.size() == 0) { return; } for (ResourceDef r : resources) { writeResource(r, resourcesElement); } } public static Document serializeToDOM(List<ResourceDef> resources) throws SerializerException { try { DocumentBuilder docBuilder = documentBuilderFactory.newDocumentBuilder(); Document document = docBuilder.newDocument(); Element resourcesElement = document.createElementNS(RESOURCE_NS_URI, RESOURCE_NS_PREFIX + ":" + RESOURCES); document.appendChild(resourcesElement); // resourcesElement.addNamespace(RESOURCE_NS_PREFIX, RESOURCE_NS_URI); // resourcesElement.addNamespace(XSD_NS_PREFIX, XSD_URI); // resourcesElement.addNamespace(XSI_NS_PREFIX, XSI_URI); // QName qname = df.createQName("schemaLocation", "xsi", XSI_URI); // resourcesElement.addAttribute(qname, RESOURCE_SCHEMA_LOCATION); if (resources == null || resources.size() == 0) { return document; } for (ResourceDef r : resources) { writeResource(r, resourcesElement); } return document; } catch (ParserConfigurationException e) { throw new SerializerException(e); } finally { } } public static String serializeToXmlString(List<ResourceDef> resources) throws SerializerException { return serializeToXmlString(resources, DEFAULT_CHARSET); } public static String serializeToXmlString(List<ResourceDef> resources, String charset) throws SerializerException { ByteArrayOutputStream out = new ByteArrayOutputStream(); try { serialize(resources, out, charset); } catch (IOException e) { throw new SerializerException(e); } return out.toString(); } public static void serialize(List<ResourceDef> resources, OutputStream out) throws IOException, SerializerException { serialize(resources, out, DEFAULT_CHARSET); } public static void serialize(List<ResourceDef> resources, OutputStream out, String charset) throws IOException, SerializerException { try { Document document = serializeToDOM(resources); TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); transformer.setOutputProperty(OutputKeys.ENCODING, charset); transformer.setOutputProperty(OutputKeys.INDENT, "yes"); transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2"); transformer.setOutputProperty(OutputKeys.CDATA_SECTION_ELEMENTS, CDATA_SECTION_ELEMENT_LIST); transformer.transform(new DOMSource(document), new StreamResult(out)); out.flush(); } catch (TransformerConfigurationException e) { throw new SerializerException(e); } catch (TransformerException e) { throw new SerializerException(e); } finally { } } protected static void writeResource(ResourceDef r, Element resourcesElement) throws SerializerException { Element resourceElem = Util4Serializer.addElement(resourcesElement, RESOURCE); resourceElem.setAttribute(ID, r.getId()); resourceElem.setAttribute(NAME, r.getName()); if (r.getDisplayName() != null && !r.getDisplayName().trim().equals("")) { resourceElem.setAttribute(DISPLAY_NAME, r.getDisplayName()); } writeDescription(resourceElem, r.getDescription()); resourceElem.setAttribute(RESOURCE_TYPE, r.getResourceType().getValue()); resourceElem.setAttribute(VALUE, r.getValue()); if (!StringUtils.isEmpty(r.getResolverBeanName()) || !StringUtils.isEmpty(r.getResolverClassName())) { Element resolverElem = Util4Serializer.addElement(resourceElem, RESOLVER); if (!StringUtils.isEmpty(r.getResolverBeanName())) { resolverElem.setAttribute(BEAN_NAME, r.getResolverBeanName()); } if (!StringUtils.isEmpty(r.getResolverClassName())) { resolverElem.setAttribute(CLASS_NAME, r.getResolverClassName()); } } writeExtendedAttributes(r.getExtendedAttributes(), resourceElem); } protected static Element writeExtendedAttributes(Map<String, String> extendedAttributes, Element parent) { if (extendedAttributes == null || extendedAttributes.size() == 0) { return null; } Element extendedAttributesElement = Util4Serializer.addElement(parent, EXTENDED_ATTRIBUTES); Iterator<String> keys = extendedAttributes.keySet().iterator(); while (keys.hasNext()) { String key = keys.next(); String value = extendedAttributes.get(key); Element extendedAttributeElement = Util4Serializer.addElement(extendedAttributesElement, EXTENDED_ATTRIBUTE); extendedAttributeElement.setAttribute(NAME, key.toString()); if (value != null) { extendedAttributeElement.setAttribute(VALUE, value.toString()); } } return extendedAttributesElement; } protected static void writeDescription(Element parent, String desc) { if (desc == null || desc.trim().equals("")) return; Document doc = parent.getOwnerDocument(); Element descElem = Util4Serializer.addElement(parent, DESCRIPTION); CDATASection cdata = doc.createCDATASection(useJDKTransformerFactory ? (" " + desc) : desc); descElem.appendChild(cdata); } }