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.xs.SchemaGrammar;
  import mf.org.apache.xerces.impl.xs.SchemaSymbols;
  import mf.org.apache.xerces.impl.xs.XSElementDecl;
  import mf.org.apache.xerces.impl.xs.identity.IdentityConstraint;
  import mf.org.apache.xerces.impl.xs.identity.UniqueOrKey;
  import mf.org.apache.xerces.util.DOMUtil;
  import mf.org.apache.xerces.xs.XSIDCDefinition;
  import mf.org.w3c.dom.Element;
  
  
  /**
   * This class contains code that is used to traverse both <key>s and
   * <unique>s.
   *
   * @author Neil Graham, IBM
   * @version $Id: XSDUniqueOrKeyTraverser.java 819653 2009-09-28 17:29:56Z knoaman $
   * @xerces.internal
   */
  class XSDUniqueOrKeyTraverser extends XSDAbstractIDConstraintTraverser {
  
      public XSDUniqueOrKeyTraverser(XSDHandler handler,
                                     XSAttributeChecker gAttrCheck) {
          super(handler, gAttrCheck);
      }
  
  
      void traverse(Element uElem, XSElementDecl element,
                    XSDocumentInfo schemaDoc, SchemaGrammar grammar) {
  
          // General Attribute Checking
          Object[] attrValues = fAttrChecker.checkAttributes(uElem, false, schemaDoc);
  
          // create identity constraint
          String uName = (String) attrValues[XSAttributeChecker.ATTIDX_NAME];
  
          if (uName == null) {
              reportSchemaError("s4s-att-must-appear", new Object[]{DOMUtil.getLocalName(uElem), SchemaSymbols.ATT_NAME}, uElem);
              //return this array back to pool
              fAttrChecker.returnAttrArray(attrValues, schemaDoc);
              return;
          }
  
          UniqueOrKey uniqueOrKey = null;
          if (DOMUtil.getLocalName(uElem).equals(SchemaSymbols.ELT_UNIQUE)) {
              uniqueOrKey = new UniqueOrKey(schemaDoc.fTargetNamespace, uName, element.fName, XSIDCDefinition.IC_UNIQUE);
          } else {
              uniqueOrKey = new UniqueOrKey(schemaDoc.fTargetNamespace, uName, element.fName, XSIDCDefinition.IC_KEY);
          }
          // it's XSDElementTraverser's job to ensure that there's no
          // duplication (or if there is that restriction is involved
          // and there's identity).
  
          // If errors occurred in traversing the identity constraint, then don't
          // add it to the schema, to avoid errors when processing the instance.
          if (traverseIdentityConstraint(uniqueOrKey, uElem, schemaDoc, attrValues)) {
              // and stuff this in the grammar
              if (grammar.getIDConstraintDecl(uniqueOrKey.getIdentityConstraintName()) == null) {
                  grammar.addIDConstraintDecl(element, uniqueOrKey);
              }
  
              final String loc = fSchemaHandler.schemaDocument2SystemId(schemaDoc);
              final IdentityConstraint idc = grammar.getIDConstraintDecl(uniqueOrKey.getIdentityConstraintName(), loc);
              if (idc == null) {
                  grammar.addIDConstraintDecl(element, uniqueOrKey, loc);
              }
  
              // handle duplicates
              if (fSchemaHandler.fTolerateDuplicates) {
                  if (idc != null) {
                      if (idc instanceof UniqueOrKey) {
                          uniqueOrKey = uniqueOrKey;
                      }
                  }
                  fSchemaHandler.addIDConstraintDecl(uniqueOrKey);
              }
          }
  
          // and fix up attributeChecker
          fAttrChecker.returnAttrArray(attrValues, schemaDoc);
      } // traverse(Element,XSDElementDecl,XSDocumentInfo, SchemaGrammar)
  } // XSDUniqueOrKeyTraverser
  