content: /*******************************************************************************
   * Copyright (c) 2000, 2007 IBM Corporation and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *   Robert M. Fuhrer (rfuhrer@watson.ibm.com), IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets;
  
  import java.util.Iterator;
  
  import org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.types.ArrayType;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.types.TType;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints2.TTypes;
  
  /**
   * Represents the set of array types whose element types are in a given TypeSet.
   * I.e., ArrayTypeSet(S) = { x[] | x \in S }
   */
  public class ArrayTypeSet extends TypeSet {
  	protected TypeSet fElemTypeSet;
  
  	protected ArrayTypeSet(TypeSetEnvironment typeSetEnvironment) {
  		super(typeSetEnvironment);
  	}
  
  	public ArrayTypeSet(TypeSet s) {
  		super(s.getTypeSetEnvironment());
  		fElemTypeSet= s;
  	}
  
  	/**
  	 * @return Returns the element TypeSet.
  	 */
  	public TypeSet getElemTypeSet() {
  		return fElemTypeSet;
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#isUniverse()
  	 */
  	public boolean isUniverse() {
  		return false;
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#makeClone()
  	 */
  	public TypeSet makeClone() {
  		return new ArrayTypeSet(fElemTypeSet);
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#isEmpty()
  	 */
  	public boolean isEmpty() {
  		return fElemTypeSet.isEmpty();
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#upperBound()
  	 */
  	public TypeSet upperBound() {
  		return new ArrayTypeSet(fElemTypeSet.upperBound());
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#lowerBound()
  	 */
  	public TypeSet lowerBound() {
  		return new ArrayTypeSet(fElemTypeSet.lowerBound());
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#hasUniqueLowerBound()
  	 */
  	public boolean hasUniqueLowerBound() {
  		return fElemTypeSet.hasUniqueLowerBound();
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#hasUniqueUpperBound()
  	 */
  	public boolean hasUniqueUpperBound() {
  		return fElemTypeSet.hasUniqueUpperBound();
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#uniqueLowerBound()
  	 */
  	public TType uniqueLowerBound() {
  		return TTypes.createArrayType(fElemTypeSet.uniqueLowerBound(), 1);
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#uniqueUpperBound()
  	 */
  	public TType uniqueUpperBound() {
  		return TTypes.createArrayType(fElemTypeSet.uniqueUpperBound(), 1);
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#contains(TType)
  	 */
  	public boolean contains(TType t) {
  		if (!(t instanceof ArrayType))
  			return false;
  		ArrayType at= (ArrayType) t;
  		return fElemTypeSet.contains(at.getComponentType());
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#containsAll(org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet)
  	 */
  	public boolean containsAll(TypeSet s) {
  		if (s instanceof ArrayTypeSet && !(s instanceof ArraySuperTypeSet)) {
  			ArrayTypeSet ats= (ArrayTypeSet) s;
  
  			return fElemTypeSet.containsAll(ats.fElemTypeSet);
  		}
  		for(Iterator iter= s.iterator(); iter.hasNext(); ) {
  			TType t= (TType) iter.next();
  			if (!contains(t))
  				return false;
  		}
  		return true;
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#iterator()
  	 */
  	public Iterator iterator() {
  		if (fEnumCache != null) return fEnumCache.iterator();
  
  		return new Iterator() {
  			Iterator fElemIter= fElemTypeSet.iterator();
  			public boolean hasNext() {
  				return fElemIter.hasNext();
  			}
  			public Object next() {
  				return TTypes.createArrayType(((TType) fElemIter.next()), 1);
  			}
  			public void remove() {
  				throw new UnsupportedOperationException();
  			}
  		};
  	}
  
  	private EnumeratedTypeSet fEnumCache= null;
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#enumerate()
  	 */
  	public EnumeratedTypeSet enumerate() {
  		if (fEnumCache == null) {
  			fEnumCache= new EnumeratedTypeSet(getTypeSetEnvironment());
  
  			for(Iterator iter= fElemTypeSet.iterator(); iter.hasNext(); ) {
  				TType t= (TType) iter.next();
  				fEnumCache.add(TTypes.createArrayType(t, 1));
  			}
  			fEnumCache.initComplete();
  		}
  		return fEnumCache;
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#isSingleton()
  	 */
  	public boolean isSingleton() {
  		return fElemTypeSet.isSingleton();
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#anyMember()
  	 */
  	public TType anyMember() {
  		return TTypes.createArrayType(fElemTypeSet.anyMember(), 1);
  	}
  
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.typesets.TypeSet#superTypes()
  	 */
  	public TypeSet superTypes() {
  		return new ArraySuperTypeSet(fElemTypeSet);
  	}
  
  	/* (non-Javadoc)
  	 * @see java.lang.Object#equals(java.lang.Object)
  	 */
  	public boolean equals(Object obj) {
  		if (obj == this) return true;
  		if (obj instanceof ArrayTypeSet) {
  			ArrayTypeSet other= (ArrayTypeSet) obj;
  
  			return fElemTypeSet.equals(other.fElemTypeSet);
  		}
  		return false;
  	}
  
  	public String toString() {
  		return "{" + fID + ": array(" + fElemTypeSet + ")}"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
  	}
  }
  