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 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

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package com.sun.xml.internal.xsom.impl;

import com.sun.xml.internal.xsom.XSElementDecl;

import com.sun.xml.internal.xsom.XSModelGroup;

import com.sun.xml.internal.xsom.XSModelGroupDecl;

import com.sun.xml.internal.xsom.XSTerm;

import com.sun.xml.internal.xsom.XSWildcard;

import com.sun.xml.internal.xsom.impl.parser.SchemaDocumentImpl;

import com.sun.xml.internal.xsom.visitor.XSFunction;

import com.sun.xml.internal.xsom.visitor.XSTermFunction;

import com.sun.xml.internal.xsom.visitor.XSTermFunctionWithParam;

import com.sun.xml.internal.xsom.visitor.XSTermVisitor;

import com.sun.xml.internal.xsom.visitor.XSVisitor;

import com.sun.xml.internal.xsom.visitor.XSWildcardFunction;

import com.sun.xml.internal.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; }

}