code: /*
   * The contents of this file are subject to the terms
   * of the Common Development and Distribution License
   * (the "License").  You may not use this file except
   * in compliance with the License.
   * 
   * You can obtain a copy of the license at
   * https://jwsdp.dev.java.net/CDDLv1.0.html
   * See the License for the specific language governing
   * permissions and limitations under the License.
   * 
   * When distributing Covered Code, include this CDDL
   * HEADER in each file and include the License file at
   * https://jwsdp.dev.java.net/CDDLv1.0.html  If applicable,
   * add the following below this CDDL HEADER, with the
   * fields enclosed by brackets "[]" replaced with your
   * own identifying information: Portions Copyright [yyyy]
   * [name of copyright owner]
   */
  package com.sun.xml.xsom.impl;
  
  import com.sun.xml.xsom.XSElementDecl;
  import com.sun.xml.xsom.XSModelGroup;
  import com.sun.xml.xsom.XSModelGroupDecl;
  import com.sun.xml.xsom.XSTerm;
  import com.sun.xml.xsom.XSWildcard;
  import com.sun.xml.xsom.impl.parser.SchemaDocumentImpl;
  import com.sun.xml.xsom.visitor.XSFunction;
  import com.sun.xml.xsom.visitor.XSTermFunction;
  import com.sun.xml.xsom.visitor.XSTermFunctionWithParam;
  import com.sun.xml.xsom.visitor.XSTermVisitor;
  import com.sun.xml.xsom.visitor.XSVisitor;
  import com.sun.xml.xsom.visitor.XSWildcardFunction;
  import com.sun.xml.xsom.visitor.XSWildcardVisitor;
  import org.xml.sax.Locator;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.Set;
  
  public abstract class WildcardImpl extends ComponentImpl implements XSWildcard, Ref.Term
  {
      protected WildcardImpl( SchemaDocumentImpl owner, AnnotationImpl _annon, Locator _loc, ForeignAttributesImpl _fa, int _mode ) {
          super(owner,_annon,_loc,_fa);
          this.mode = _mode;
      }
      
      private final int mode;
      public int getMode() { return mode; }
      
      // compute the union
      public WildcardImpl union( SchemaDocumentImpl owner, WildcardImpl rhs ) {
          if(this instanceof Any || rhs instanceof Any)
              return new Any(owner,null,null,null,mode);
          
          if(this instanceof Finite && rhs instanceof Finite) {
              Set<String> values = new HashSet<String>();
              values.addAll( ((Finite)this).names );
              values.addAll( ((Finite)rhs ).names );
              return new Finite(owner,null,null,null,values,mode);
          }
          
          if(this instanceof Other && rhs instanceof Other) {
              if( ((Other)this).otherNamespace.equals(
                  ((Other)rhs).otherNamespace) )
                  return new Other(owner,null,null,null, ((Other)this).otherNamespace, mode );
              else
                  // this somewhat strange rule is indeed in the spec
                  return new Other(owner,null,null,null, "", mode );
          }
          
          Other o;
          Finite f;
          
          if( this instanceof Other ) {
              o=(Other)this; f=(Finite)rhs;
          } else {
              o=(Other)rhs; f=(Finite)this;
          }
          
          if(f.names.contains(o.otherNamespace))
              return new Any(owner,null,null,null,mode);
          else
              return new Other(owner,null,null,null,o.otherNamespace,mode);
      }
      
      
      
      public final static class Any extends WildcardImpl implements XSWildcard.Any {
          public Any( SchemaDocumentImpl owner, AnnotationImpl _annon, Locator _loc, ForeignAttributesImpl _fa, int _mode ) {
              super(owner,_annon,_loc,_fa,_mode);
          }
          
          public boolean acceptsNamespace( String namespaceURI ) {
              return true;
          }
          public void visit( XSWildcardVisitor visitor ) {
              visitor.any(this);
          }
          public Object apply( XSWildcardFunction function ) {
              return function.any(this);
          }
      }
      
      public final static class Other extends WildcardImpl implements XSWildcard.Other {
          public Other( SchemaDocumentImpl owner, AnnotationImpl _annon, Locator _loc, ForeignAttributesImpl _fa,
                      String otherNamespace, int _mode ) {
              super(owner,_annon,_loc,_fa,_mode);
              this.otherNamespace = otherNamespace;
          }
          
          private final String otherNamespace;
  
          public String getOtherNamespace() { return otherNamespace; }
          
          public boolean acceptsNamespace( String namespaceURI ) {
              return !namespaceURI.equals(otherNamespace);
          }
  
          public void visit( XSWildcardVisitor visitor ) {
              visitor.other(this);
          }
          public Object apply( XSWildcardFunction function ) {
              return function.other(this);
          }
      }
      
      public final static class Finite extends WildcardImpl implements XSWildcard.Union {
          public Finite( SchemaDocumentImpl owner, AnnotationImpl _annon, Locator _loc, ForeignAttributesImpl _fa,
                      Set<String> ns, int _mode ) {
              super(owner,_annon,_loc,_fa,_mode);
              names = ns;
              namesView = Collections.unmodifiableSet(names);
          }
          
          private final Set<String> names;
          private final Set<String> namesView;
  
          public Iterator<String> iterateNamespaces() {
              return names.iterator();
          }
  
          public Collection<String> getNamespaces() {
              return namesView;
          }
  
          public boolean acceptsNamespace( String namespaceURI ) {
              return names.contains(namespaceURI);
          }
  
          public void visit( XSWildcardVisitor visitor ) {
              visitor.union(this);
          }
          public Object apply( XSWildcardFunction function ) {
              return function.union(this);
          }
      }
      
      public final void visit( XSVisitor visitor ) {
          visitor.wildcard(this);
      }
      public final void visit( XSTermVisitor visitor ) {
          visitor.wildcard(this);
      }
      public Object apply( XSTermFunction function ) {
          return function.wildcard(this);
      }
  
      public <T,P> T apply(XSTermFunctionWithParam<T, P> function, P param) {
          return function.wildcard(this,param);
      }
  
      public Object apply( XSFunction function ) {
          return function.wildcard(this);
      }
  
  
      public boolean isWildcard()                 { return true; }
      public boolean isModelGroupDecl()           { return false; }
      public boolean isModelGroup()               { return false; }
      public boolean isElementDecl()              { return false; }
  
      public XSWildcard asWildcard()              { return this; }
      public XSModelGroupDecl asModelGroupDecl()  { return null; }
      public XSModelGroup asModelGroup()          { return null; }
      public XSElementDecl asElementDecl()        { return null; }
  
  
      // Ref.Term implementation
      public XSTerm getTerm() { return this; }
  }
  