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/*
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* JBind
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*
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* Copyright (c) by Stefan Wachter. All rights reserved.
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*
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* Usage, modification, and redistribution is subject to license terms that are
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* available at 'http://www.jbind.org'. The JBind license is like the
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* 'Apache Software License V 1.1'.
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*/
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package org.jbind.xml.core.bridge;
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import java.io.IOException;
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import java.io.Writer;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.Stack;
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import org.jbind.xml.base.StringUtil;
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import org.jbind.xml.core.data.IImpl;
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import org.jbind.xml.msg.XmlException;
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import org.jbind.xml.msg.XmlMessages;
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public class MarshalVisitor implements IDataImplVisitor {
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private Writer myWriter;
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private Stack myMappings = null;
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private Map myTopLevelAttributes;
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private List myNewNamespaces = null;
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public MarshalVisitor() {}
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private String getQName(String aNamespace, String aLocalName) {
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String res = null;
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if ((null != aNamespace) && !"".equals(aNamespace)) {
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Map currentMapping = (Map)myMappings.peek();
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String prefix = (String)currentMapping.get(aNamespace);
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if (null == prefix) {
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int i = 0;
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do {
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String p = "p" + i++;
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if (!currentMapping.values().contains(p)) {
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prefix = p;
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Map m = new HashMap(currentMapping);
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m.put(aNamespace, p);
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myMappings.pop();
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myMappings.push(m);
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if (null == myNewNamespaces) {
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myNewNamespaces = new ArrayList();
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}
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myNewNamespaces.add(aNamespace);
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}
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} while (prefix == null);
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}
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res = prefix + ":" + aLocalName;
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} else {
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res = aLocalName;
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}
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return res;
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}
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public void visitElementImplStart(IElementImpl anImpl) throws XmlException {
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try {
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myMappings.push(myMappings.peek());
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String elemNamespace = anImpl.getNamespace();
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String elemLocalName = anImpl.getPartName();
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String elemQName = getQName(elemNamespace, elemLocalName);
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myWriter.write("<" + elemQName);
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for (Iterator i = anImpl.iterAttributeImpls(); i.hasNext(); ) {
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IAttributeImpl a = (IAttributeImpl)i.next();
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String attrNamespace = a.getNamespace();
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String attrLocalName = a.getPartName();
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String attrQName = getQName(attrNamespace, attrLocalName);
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String attrValue = StringUtil.toXml(a.getTextContent());
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myWriter.write(" " + attrQName + "=\"" + attrValue + "\"");
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}
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if (null != myTopLevelAttributes) {
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for (Iterator i = myTopLevelAttributes.entrySet().iterator();
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i.hasNext(); ) {
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Map.Entry me = (Map.Entry)i.next();
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myWriter.write(" " + me.getKey() + "=\"" + StringUtil.toXml((String)me.getValue()) + "\"");
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}
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myTopLevelAttributes = null;
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}
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if (null != myNewNamespaces) {
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Map currentMappings = (Map)myMappings.peek();
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for (Iterator i = myNewNamespaces.iterator(); i.hasNext(); ) {
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String newNamespace = (String)i.next();
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String newPrefix = (String)currentMappings.get(newNamespace);
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if ("".equals(newPrefix)) {
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myWriter.write(" xmlns=\"" + newNamespace + "\"");
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} else {
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myWriter.write(" xmlns:" + newPrefix + "=\"" + newNamespace + "\"");
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}
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}
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myNewNamespaces = null;
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}
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myWriter.write(">");
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} catch (IOException e) {
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throw new XmlException(XmlMessages.wrappedException(e, anImpl));
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}
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}
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public void visitElementImplEnd(IElementImpl anImpl) throws XmlException {
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try {
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String elemNamespace = anImpl.getNamespace();
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String elemLocalName = anImpl.getPartName();
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String elemQName = getQName(elemNamespace, elemLocalName);
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myWriter.write("</" + elemQName + ">");
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myMappings.pop();
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} catch (IOException e) {
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throw new XmlException(XmlMessages.wrappedException(e, anImpl));
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}
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}
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public void visitTextImpl(ITextImpl anImpl) throws XmlException {
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try {
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myWriter.write(StringUtil.toXml(anImpl.getTextContent()));
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} catch (IOException e) {
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throw new XmlException(XmlMessages.wrappedException(e, anImpl));
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}
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}
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/**
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* Marshals a data implementation. The marshalling starts straight with the root
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* element, i.e. any XML prolog must be written in advance.
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*
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* @param anImpl <i>(required)</i>. The data implementation to marshal.
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* @param aWriter <i>(required)</i>.
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* @param aNamespaceToPrefixMapping <i>(optional)</i>. An initial mapping.
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* @param aTopLevelAttributes <i>(optional)</i>. Additional attributes that
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* are added to the top level element. This can be used to add schema location
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* attributes.
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*/
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public synchronized void marshal(IImpl anImpl, Writer aWriter, Map aNamespaceToPrefixMapping, Map aTopLevelAttributes) throws XmlException {
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myWriter = aWriter;
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myTopLevelAttributes = aTopLevelAttributes;
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Map mapping = (null != aNamespaceToPrefixMapping) ? aNamespaceToPrefixMapping : Collections.EMPTY_MAP;
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myMappings = new Stack();
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myMappings.push(mapping);
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myNewNamespaces = new ArrayList();
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myNewNamespaces.addAll(mapping.keySet());
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anImpl.accept(this);
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6
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try {
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aWriter.flush();
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} catch (IOException e) {
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0
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throw new XmlException(XmlMessages.wrappedException(e, anImpl));
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158
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}
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159
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}
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}
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