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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.schema.element;
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import java.io.InputStream;
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import java.net.URL;
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import java.util.Iterator;
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import java.util.Map;
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import org.jbind.message.IMessage;
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import org.jbind.util.collection.UnsynchronizedStack;
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import org.jbind.util.other.StrBuffer;
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import org.jbind.xml.base.ILocation;
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import org.jbind.xml.base.InputSourceLocation;
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import org.jbind.xml.base.WhiteSpaceProcessing;
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import org.jbind.xml.core.bridge.IRegEx;
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import org.jbind.xml.core.bridge.IRegExFactory;
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import org.jbind.xml.core.bridge.IXPath;
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import org.jbind.xml.core.bridge.IXPathFactory;
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import org.jbind.xml.msg.IConstraintViolations;
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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.jbind.xml.parser.AttributeData;
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import org.jbind.xml.parser.IContentHandler;
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import org.jbind.xml.parser.IErrorHandler;
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import org.jbind.xml.parser.INamespaceContext;
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import org.jbind.xml.parser.InputSourceParser;
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import org.jbind.xml.parser.QualifiedName;
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import org.jbind.xml.schema.instantiation.IElemValHelper;
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import org.jbind.xml.schema.instantiation.ISchemaElement;
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import org.jbind.xml.schema.instantiation.ISchemaParser;
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import org.xml.sax.EntityResolver;
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import org.xml.sax.InputSource;
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public class SchemaParser implements ISchemaParser, IElemValHelper, IContentHandler, IErrorHandler {
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private EntityResolver myEntityResolver;
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private IXPathFactory myXPathFactory;
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private IRegExFactory myRegExFactory;
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private UnsynchronizedStack myStack = null;
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private StrBuffer myCharacterBuffer = new StrBuffer();
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private ILocation myCharacterLocation = null;
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private Map myCharacterPrefixMappings = null;
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private IConstraintViolations myViolations = null;
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private ISchemaDocument myDocument = null;
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private SchemaElement mySchemaElement = null;
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private ISchemaElement myParentSchemaElement = null;
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private int myIgnoreElements = 0;
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private InputSourceParser myParser = new InputSourceParser();
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public SchemaParser(EntityResolver anEntityResolver, IXPathFactory anXPathFactory, IRegExFactory aRegExFactory) {
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myEntityResolver = anEntityResolver;
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myXPathFactory = anXPathFactory;
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myRegExFactory = aRegExFactory;
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}
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private void prepare() {
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myStack = new UnsynchronizedStack();
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myDocument = null;
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myIgnoreElements = 0;
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}
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public synchronized ISchemaElement parseSchema(URL anUrl, ISchemaElement aParent) throws XmlException {
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myViolations = XmlMessages.constraintViolations();
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myParentSchemaElement = aParent;
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prepare();
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try {
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InputStream inputStream = anUrl.openStream();
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InputSource inputSource = new InputSource(inputStream);
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inputSource.setSystemId(anUrl.toString());
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myParser.parse(inputSource, this, this, myEntityResolver);
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} catch (Exception e) {
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throw new XmlException(XmlMessages.wrappedException(e, null));
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}
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if (!myViolations.isEmpty()) {
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throw new XmlException(myViolations);
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}
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return myDocument.getSchemaElement();
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}
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private UnsynchronizedStack getStack() {
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return myStack;
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}
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public ISchemaDocument getDocument() {
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return myDocument;
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}
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public void startDocument(InputSource anInputSource, INamespaceContext aNamespaceContext) {
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myDocument = new SchemaDocument();
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getStack().push(myDocument);
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}
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public void endDocument(InputSource anInputSource, INamespaceContext aNamespaceContext) {
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if (myCharacterBuffer.length() > 0) {
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addTextChild();
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}
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}
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public void startElement(QualifiedName aQName, Map anAttributes, int aLine, int aColumn, InputSource anInputSource, INamespaceContext aNamespaceContext) throws Exception {
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if (myIgnoreElements > 0) {
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myIgnoreElements++;
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return;
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}
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addTextChild();
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Map prefixMapping = aNamespaceContext.getCurrentMapping();
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IParent parent = (IParent)getStack().peek();
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// Determine the parent element. The root element has no parent.
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IElement parentElement = (parent instanceof IElement) ? (IElement)parent : null;
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ILocation location = new InputSourceLocation(anInputSource, aLine, aColumn);
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IElement element = null;
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CreationParams creationParams = new CreationParams(myDocument, location, parentElement, prefixMapping, aQName);
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try {
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if (null == parentElement) {
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mySchemaElement = new SchemaElement(creationParams, myParentSchemaElement);
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element = mySchemaElement;
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} else {
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element = ((IElement)parentElement).createChild(creationParams, myViolations);
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}
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parent.addChild(element);
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for (Iterator i = anAttributes.values().iterator(); i.hasNext(); ) {
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AttributeData ad = (AttributeData)i.next();
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String attQName = "".equals(ad.qn.getPrefix()) ? ad.qn.getLocalPart() : ad.qn.getPrefix() + ":" + ad.qn.getLocalPart();
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String attNamespace = ad.qn.getNamespace();
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String attLocalName = ad.qn.getLocalPart();
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String attValue = ad.value;
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try {
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ACParams acParams = new ACParams(attQName, attNamespace, attLocalName, attValue, location, prefixMapping, mySchemaElement);
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element.addAttribute(acParams);
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} catch (XmlException e) {
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myViolations.add(e.getXmlMessage());
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}
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}
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} catch (XmlException e) {
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myViolations.add(e.getXmlMessage());
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myIgnoreElements++;
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}
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getStack().push(element);
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}
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public void endElement(QualifiedName aQName, Map anAttributes, int aLine, int aColumn, InputSource anInputSource, INamespaceContext aNamespaceContext) throws Exception {
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if (myIgnoreElements > 0) {
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myIgnoreElements--;
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if (myIgnoreElements == 0) {
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myCharacterBuffer.setLength(0);
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}
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return;
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}
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addTextChild();
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IElement element = (IElement)getStack().pop();
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element.validateElement(this, myViolations);
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}
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private void addTextChild() {
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// White space is collapsed
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String s = WhiteSpaceProcessing.COLLAPSE.process(myCharacterBuffer.toString());
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if (s.length() > 0) {
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IParent parent = (IParent)getStack().peek();
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IElement parentElement = (parent instanceof IElement) ? (IElement)parent : null;
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IText text = new Text(s);
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if (null != text) {
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text.setLocation(myCharacterLocation);
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parent.addChild(text);
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}
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myCharacterBuffer.setLength(0);
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}
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myCharacterPrefixMappings = null;
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}
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public void text(String aString, int aLine, int aColumn, InputSource anInputSource, INamespaceContext aNamespaceContext) throws Exception {
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if (myCharacterBuffer.length() == 0) {
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myCharacterLocation = new InputSourceLocation(anInputSource, aLine, aColumn);
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myCharacterPrefixMappings = aNamespaceContext.getCurrentMapping();
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}
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myCharacterBuffer.append(aString);
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}
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public void startXInclude(String aParseMethod, URL aUrl, String aFragementId) {}
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public void endXInclude() {}
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public IRegEx createRegEx(String aRegEx) throws Exception {
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return myRegExFactory.createRegEx(aRegEx);
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}
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public IXPath createXPath(String anXPath, Map aPrefixMappings, boolean aRestrictedForm) throws Exception {
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return myXPathFactory.createXPath(anXPath, aPrefixMappings, aRestrictedForm);
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}
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public void fatalError(IMessage aMessage) {
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myViolations.add(aMessage);
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}
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public boolean error(IMessage aMessage) {
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myViolations.add(aMessage);
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return false;
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}
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public boolean warning(IMessage aMessage) {
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myViolations.add(aMessage);
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return false;
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}
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public void exception(Exception anException, InputSource anInputSource) {
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anException.printStackTrace();
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myViolations.add(XmlMessages.wrappedException(anException, new InputSourceLocation(anInputSource)));
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}
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}
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