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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.util.ArrayList;
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import java.util.Collection;
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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 org.jbind.util.collection.UnsynchronizedStack;
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import org.jbind.xml.base.QName;
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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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import org.xml.sax.Attributes;
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import org.xml.sax.ContentHandler;
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import org.xml.sax.SAXException;
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public class SaxVisitor implements IDataImplVisitor {
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private ContentHandler myContentHandler = null;
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private UnsynchronizedStack myMappings = null;
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private UnsynchronizedStack myNewNamespaces = null;
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private Map myTopLevelAttributes = null;
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public SaxVisitor() {}
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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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((List)myNewNamespaces.peek()).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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ArrayList newNamespaces = new ArrayList();
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myNewNamespaces.push(newNamespaces);
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String namespace = anImpl.getNamespace();
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String localName = anImpl.getPartName();
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String qName = getQName(namespace, localName);
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SaxAttrs attrs = new SaxAttrs();
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for (Iterator i = anImpl.iterAttributeImpls(); i.hasNext(); ) {
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IAttributeImpl ai = (IAttributeImpl)i.next();
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String attrNamespace = ai.getNamespace();
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String attrLocalName = ai.getPartName();
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String attrQName = getQName(attrNamespace, attrLocalName);
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SaxAttr a = new SaxAttr(attrNamespace, attrLocalName, attrQName, ai.getTextContent());
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attrs.add(a);
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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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String attrQName = (String)me.getKey();
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QName qn = QName.create(attrQName, anImpl.getPrefixToNamespaceMapping());
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if (null == qn) {
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throw new XmlException(XmlMessages.invalidQName(attrQName, null));
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}
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SaxAttr a = new SaxAttr(qn.getNamespace(), qn.getLocalPart(), attrQName, (String)me.getValue());
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attrs.add(a);
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}
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myTopLevelAttributes = null;
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}
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startPrefixMappings(newNamespaces, (Map)myMappings.peek());
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myContentHandler.startElement(namespace, localName, qName, attrs);
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} catch (SAXException e) {
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throw new XmlException(e, 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 namespace = anImpl.getNamespace();
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String localName = anImpl.getPartName();
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String qName = getQName(namespace, localName);
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myContentHandler.endElement(namespace, localName, qName);
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Map m = (Map)myMappings.pop();
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List newNamespaces = (List)myNewNamespaces.pop();
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endPrefixMappings(newNamespaces, m);
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} catch (SAXException e) {
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throw new XmlException(e, 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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char[] chars = anImpl.getTextContent().toCharArray();
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myContentHandler.characters(chars, 0, chars.length);
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} catch (SAXException e) {
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throw new XmlException(e, XmlMessages.wrappedException(e, anImpl));
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}
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}
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public synchronized void outputSaxEvents(IImpl anImpl, ContentHandler aHandler, Map aNamespaceToPrefixMapping, Map aTopLevelAttributes) throws XmlException {
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try {
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myContentHandler = aHandler;
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myTopLevelAttributes = aTopLevelAttributes;
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myContentHandler.startDocument();
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Map namespaces = (null != aNamespaceToPrefixMapping) ? aNamespaceToPrefixMapping : Collections.EMPTY_MAP;
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startPrefixMappings(namespaces.keySet(), namespaces);
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myMappings = new UnsynchronizedStack();
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myMappings.push(namespaces);
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myNewNamespaces = new UnsynchronizedStack();
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anImpl.accept(this);
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endPrefixMappings(namespaces.keySet(), namespaces);
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myContentHandler.endDocument();
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} catch (SAXException e) {
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throw new XmlException(e, XmlMessages.wrappedException(e, anImpl));
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}
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}
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private void startPrefixMappings(Collection aNamespaces, Map aMappings) throws SAXException {
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for (Iterator i = aNamespaces.iterator(); i.hasNext(); ) {
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String namespace = (String)i.next();
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myContentHandler.startPrefixMapping((String)aMappings.get(namespace), namespace);
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}
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}
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private void endPrefixMappings(Collection aNamespaces, Map aMappings) throws SAXException {
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for (Iterator i = aNamespaces.iterator(); i.hasNext(); ) {
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String namespace = (String)i.next();
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myContentHandler.endPrefixMapping((String)aMappings.get(namespace));
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}
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}
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private static class SaxAttrs implements Attributes {
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private List myAttrs = new ArrayList();
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public int getIndex(String aQName) {
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for (int i = 0; i < myAttrs.size(); i++) {
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if (aQName.equals(((SaxAttr)myAttrs.get(i)).qName)) {
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return i;
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}
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}
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return -1;
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}
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public int getIndex(String aNamespace, String aLocalName) {
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for (int i = 0; i < myAttrs.size(); i++) {
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if (aNamespace.equals(((SaxAttr)myAttrs.get(i)).namespace) && aLocalName.equals(((SaxAttr)myAttrs.get(i)).localName)) {
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return i;
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}
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}
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return -1;
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}
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public int getLength() {
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return myAttrs.size();
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}
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public String getLocalName(int param) {
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return ((param < 0) || (param >= myAttrs.size())) ? null : ((SaxAttr)myAttrs.get(param)).localName;
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}
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public String getQName(int param) {
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return ((param < 0) || (param >= myAttrs.size())) ? null : ((SaxAttr)myAttrs.get(param)).qName;
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}
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public String getValue(int param) {
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return ((param < 0) || (param >= myAttrs.size())) ? null : ((SaxAttr)myAttrs.get(param)).value;
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}
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public String getValue(String str) {
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return getValue(getIndex(str));
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}
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public String getValue(String str, String str1) {
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return getValue(getIndex(str, str1));
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}
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public String getURI(int param) {
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return ((param < 0) || (param >= myAttrs.size())) ? null : ((SaxAttr)myAttrs.get(param)).namespace;
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}
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public String getType(int param) {
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return ((param < 0) || (param >= myAttrs.size())) ? null : "CDATA";
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}
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public String getType(String str) {
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return getType(getIndex(str));
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}
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public String getType(String str, String str1) {
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return getType(getIndex(str, str1));
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}
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public void add(SaxAttr anAttr) {
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myAttrs.add(anAttr);
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}
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}
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private static class SaxAttr {
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String namespace;
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String localName;
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String qName;
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String value;
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SaxAttr(String aNamespace, String aName, String aQName, String aValue) {
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namespace = aNamespace;
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localName = aName;
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qName = aQName;
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value = aValue;
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}
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}
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}
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