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;
  
  import mf.org.apache.xerces.impl.dv.ValidatedInfo;
  import mf.org.apache.xerces.impl.xs.util.XSObjectListImpl;
  import mf.org.apache.xerces.xs.ShortList;
  import mf.org.apache.xerces.xs.XSAttributeDeclaration;
  import mf.org.apache.xerces.xs.XSAttributeUse;
  import mf.org.apache.xerces.xs.XSConstants;
  import mf.org.apache.xerces.xs.XSNamespaceItem;
  import mf.org.apache.xerces.xs.XSObjectList;
  import mf.org.apache.xerces.xs.XSValue;
  
  
  /**
   * The XML representation for an attribute use
   * schema component is a local &lt;attribute&gt; element information item
   *
   * @author Sandy Gao, IBM
   * @version $Id: XSAttributeUseImpl.java 1024038 2010-10-18 22:06:35Z sandygao $
   * @xerces.internal
   */
  public class XSAttributeUseImpl implements XSAttributeUse {
  
      // the referred attribute decl
      public XSAttributeDecl fAttrDecl = null;
      // use information: SchemaSymbols.USE_OPTIONAL, REQUIRED, PROHIBITED
      public short fUse = SchemaSymbols.USE_OPTIONAL;
      // value constraint type: default, fixed or !specified
      public short fConstraintType = XSConstants.VC_NONE;
      // value constraint value
      public ValidatedInfo fDefault = null;
      // optional annotation
      public XSObjectList fAnnotations = null;
  
      public void reset() {
          fDefault = null;
          fAttrDecl = null;
          fUse = SchemaSymbols.USE_OPTIONAL;
          fConstraintType = XSConstants.VC_NONE;
          fAnnotations = null;
      }
  
      /**
       * Get the type of the object, i.e ELEMENT_DECLARATION.
       */
      @Override
      public short getType() {
          return XSConstants.ATTRIBUTE_USE;
      }
  
      /**
       * The <code>name</code> of this <code>XSObject</code> depending on the
       * <code>XSObject</code> type.
       */
      @Override
      public String getName() {
          return null;
      }
  
      /**
       * The namespace URI of this node, or <code>null</code> if it is
       * unspecified.  defines how a namespace URI is attached to schema
       * components.
       */
      @Override
      public String getNamespace() {
          return null;
      }
  
      /**
       * {required} determines whether this use of an attribute declaration
       * requires an appropriate attribute information item to be present, or
       * merely allows it.
       */
      @Override
      public boolean getRequired() {
          return fUse == SchemaSymbols.USE_REQUIRED;
      }
  
      /**
       * {attribute declaration} provides the attribute declaration itself,
       * which will in turn determine the simple type definition used.
       */
      @Override
      public XSAttributeDeclaration getAttrDeclaration() {
          return fAttrDecl;
      }
  
      /**
       * Value Constraint: one of default, fixed.
       */
      @Override
      public short getConstraintType() {
          return fConstraintType;
      }
  
      /**
       * Value Constraint: The actual value (with respect to the {type
       * definition}).
       */
      @Override
      public String getConstraintValue() {
          // REVISIT: SCAPI: what's the proper representation
          return getConstraintType() == XSConstants.VC_NONE ?
                  null :
                  fDefault.stringValue();
      }
  
      /**
       * @see mf.org.apache.xerces.xs.XSObject#getNamespaceItem()
       */
      @Override
      public XSNamespaceItem getNamespaceItem() {
          return null;
      }
  
      @Override
      public Object getActualVC() {
          return getConstraintType() == XSConstants.VC_NONE ?
                  null :
                  fDefault.actualValue;
      }
  
      @Override
      public short getActualVCType() {
          return getConstraintType() == XSConstants.VC_NONE ?
                  XSConstants.UNAVAILABLE_DT :
                  fDefault.actualValueType;
      }
  
      @Override
      public ShortList getItemValueTypes() {
          return getConstraintType() == XSConstants.VC_NONE ?
                  null :
                  fDefault.itemValueTypes;
      }
  
      @Override
      public XSValue getValueConstraintValue() {
          return fDefault;
      }
  
      /**
       * Optional. Annotations.
       */
      @Override
      public XSObjectList getAnnotations() {
          return (fAnnotations != null) ? fAnnotations : XSObjectListImpl.EMPTY_LIST;
      }
  
  } // class XSAttributeUseImpl
  