content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 mf.org.apache.xerces.impl.xs.traversers;
  
  import mf.org.apache.xerces.impl.xpath.XPathException;
  import mf.org.apache.xerces.impl.xs.SchemaSymbols;
  import mf.org.apache.xerces.impl.xs.identity.Field;
  import mf.org.apache.xerces.impl.xs.identity.IdentityConstraint;
  import mf.org.apache.xerces.impl.xs.identity.Selector;
  import mf.org.apache.xerces.util.DOMUtil;
  import mf.org.apache.xerces.util.XMLChar;
  import mf.org.w3c.dom.Element;
  
  
  /**
   * This class contains code that all three IdentityConstraint
   * traversers (the XSDUniqueTraverser, XSDKeyTraverser and
   * XSDKeyrefTraverser) rely upon.
   *
   * @version $Id: XSDAbstractIDConstraintTraverser.java 774786 2009-05-14 14:31:10Z sandygao $
   * @xerces.internal
   */
  class XSDAbstractIDConstraintTraverser extends XSDAbstractTraverser {
  
      public XSDAbstractIDConstraintTraverser(XSDHandler handler,
                                              XSAttributeChecker gAttrCheck) {
          super(handler, gAttrCheck);
      }
  
      boolean traverseIdentityConstraint(IdentityConstraint ic,
                                         Element icElem, XSDocumentInfo schemaDoc, Object[] icElemAttrs) {
  
          // General Attribute Checking will have been done on icElem by caller
  
          // check for <annotation> and get selector
          Element sElem = DOMUtil.getFirstChildElement(icElem);
          if (sElem == null) {
              reportSchemaError("s4s-elt-must-match.2",
                      new Object[]{"identity constraint", "(annotation?, selector, field+)"},
                      icElem);
              return false;
          }
  
          // General Attribute Checking on sElem
          // first child could be an annotation
          if (DOMUtil.getLocalName(sElem).equals(SchemaSymbols.ELT_ANNOTATION)) {
              ic.addAnnotation(traverseAnnotationDecl(sElem, icElemAttrs, false, schemaDoc));
              sElem = DOMUtil.getNextSiblingElement(sElem);
              // if no more children report an error
              if (sElem == null) {
                  reportSchemaError("s4s-elt-must-match.2", new Object[]{"identity constraint", "(annotation?, selector, field+)"}, icElem);
                  return false;
              }
          } else {
              String text = DOMUtil.getSyntheticAnnotation(icElem);
              if (text != null) {
                  ic.addAnnotation(traverseSyntheticAnnotation(icElem, text, icElemAttrs, false, schemaDoc));
              }
          }
  
          // must be <selector>
          if (!DOMUtil.getLocalName(sElem).equals(SchemaSymbols.ELT_SELECTOR)) {
              reportSchemaError("s4s-elt-must-match.1", new Object[]{"identity constraint", "(annotation?, selector, field+)", SchemaSymbols.ELT_SELECTOR}, sElem);
              return false;
          }
          Object[] attrValues = fAttrChecker.checkAttributes(sElem, false, schemaDoc);
  
          // make sure <selector>'s content is fine:
          Element selChild = DOMUtil.getFirstChildElement(sElem);
  
          if (selChild != null) {
              // traverse annotation if any
              if (DOMUtil.getLocalName(selChild).equals(SchemaSymbols.ELT_ANNOTATION)) {
                  ic.addAnnotation(traverseAnnotationDecl(selChild, attrValues, false, schemaDoc));
                  selChild = DOMUtil.getNextSiblingElement(selChild);
              } else {
                  reportSchemaError("s4s-elt-must-match.1", new Object[]{SchemaSymbols.ELT_SELECTOR, "(annotation?)", DOMUtil.getLocalName(selChild)}, selChild);
              }
              if (selChild != null) {
                  reportSchemaError("s4s-elt-must-match.1", new Object[]{SchemaSymbols.ELT_SELECTOR, "(annotation?)", DOMUtil.getLocalName(selChild)}, selChild);
              }
          } else {
              String text = DOMUtil.getSyntheticAnnotation(sElem);
              if (text != null) {
                  ic.addAnnotation(traverseSyntheticAnnotation(icElem, text, attrValues, false, schemaDoc));
              }
          }
  
          String sText = ((String) attrValues[XSAttributeChecker.ATTIDX_XPATH]);
          if (sText == null) {
              reportSchemaError("s4s-att-must-appear", new Object[]{SchemaSymbols.ELT_SELECTOR, SchemaSymbols.ATT_XPATH}, sElem);
              return false;
          }
          sText = XMLChar.trim(sText);
  
          Selector.XPath sXpath = null;
          try {
              sXpath = new Selector.XPath(sText, fSymbolTable,
                      schemaDoc.fNamespaceSupport);
              Selector selector = new Selector(sXpath, ic);
              ic.setSelector(selector);
          } catch (XPathException e) {
              reportSchemaError(e.getKey(), new Object[]{sText}, sElem);
              // put back attr values...
              fAttrChecker.returnAttrArray(attrValues, schemaDoc);
              return false;
          }
  
          // put back attr values...
          fAttrChecker.returnAttrArray(attrValues, schemaDoc);
  
          // get fields
          Element fElem = DOMUtil.getNextSiblingElement(sElem);
          if (fElem == null) {
              reportSchemaError("s4s-elt-must-match.2", new Object[]{"identity constraint", "(annotation?, selector, field+)"}, sElem);
              return false;
          }
          while (fElem != null) {
              if (!DOMUtil.getLocalName(fElem).equals(SchemaSymbols.ELT_FIELD)) {
                  reportSchemaError("s4s-elt-must-match.1", new Object[]{"identity constraint", "(annotation?, selector, field+)", SchemaSymbols.ELT_FIELD}, fElem);
                  fElem = DOMUtil.getNextSiblingElement(fElem);
                  continue;
              }
  
              // General Attribute Checking
              attrValues = fAttrChecker.checkAttributes(fElem, false, schemaDoc);
  
              // and make sure <field>'s content is fine:
              Element fieldChild = DOMUtil.getFirstChildElement(fElem);
              if (fieldChild != null) {
                  // traverse annotation
                  if (DOMUtil.getLocalName(fieldChild).equals(SchemaSymbols.ELT_ANNOTATION)) {
                      ic.addAnnotation(traverseAnnotationDecl(fieldChild, attrValues, false, schemaDoc));
                      fieldChild = DOMUtil.getNextSiblingElement(fieldChild);
                  }
              }
              if (fieldChild != null) {
                  reportSchemaError("s4s-elt-must-match.1", new Object[]{SchemaSymbols.ELT_FIELD, "(annotation?)", DOMUtil.getLocalName(fieldChild)}, fieldChild);
              } else {
                  String text = DOMUtil.getSyntheticAnnotation(fElem);
                  if (text != null) {
                      ic.addAnnotation(traverseSyntheticAnnotation(icElem, text, attrValues, false, schemaDoc));
                  }
              }
              String fText = ((String) attrValues[XSAttributeChecker.ATTIDX_XPATH]);
              if (fText == null) {
                  reportSchemaError("s4s-att-must-appear", new Object[]{SchemaSymbols.ELT_FIELD, SchemaSymbols.ATT_XPATH}, fElem);
                  fAttrChecker.returnAttrArray(attrValues, schemaDoc);
                  return false;
              }
              fText = XMLChar.trim(fText);
              try {
                  Field.XPath fXpath = new Field.XPath(fText, fSymbolTable,
                          schemaDoc.fNamespaceSupport);
                  Field field = new Field(fXpath, ic);
                  ic.addField(field);
              } catch (XPathException e) {
                  reportSchemaError(e.getKey(), new Object[]{fText}, fElem);
                  // put back attr values...
                  fAttrChecker.returnAttrArray(attrValues, schemaDoc);
                  return false;
              }
              fElem = DOMUtil.getNextSiblingElement(fElem);
              // put back attr values...
              fAttrChecker.returnAttrArray(attrValues, schemaDoc);
          }
  
          return ic.getFieldCount() > 0;
      } // traverseIdentityConstraint(IdentityConstraint,Element, XSDocumentInfo)
  } // XSDAbstractIDConstraintTraverser
  
  