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The source code/* * Sun Public License Notice * * The contents of this file are subject to the Sun Public License * Version 1.0 (the "License"). You may not use this file except in * compliance with the License. A copy of the License is available at * http://www.sun.com/ * * The Original Code is NetBeans. The Initial Developer of the Original * Code is Sun Microsystems, Inc. Portions Copyright 1997-2000 Sun * Microsystems, Inc. All Rights Reserved. */ package org.netbeans.modules.form.codestructure; import java.util.Iterator; /** * Abstract class providing common implementation of UsingCodeObject * interface for further CodeStatement implementations. No other * UsingCodeObject implementation for statement should be introduced. * * @author Tomas Pavek */ abstract class AbstractCodeStatement implements CodeStatement { protected CodeExpression parentExpression; protected AbstractCodeStatement(CodeExpression parentExpression) { this.parentExpression = parentExpression; } public CodeExpression getParentExpression() { return parentExpression; } // -------- // UsingCodeObject implementation // notifying about registering this object in used object public void usageRegistered(UsedCodeObject usedObject) { } // notifying about removing the used object from structure public boolean usedObjectRemoved(UsedCodeObject usedObject) { return false; } public UsedCodeObject getDefiningObject() { return getParentExpression(); } public Iterator getUsedObjectsIterator() { return new UsedObjectsIterator(); } // -------- private class UsedObjectsIterator implements Iterator { int index; CodeExpression[] parameters; UsedObjectsIterator() { index = getParentExpression() != null ? -1 : 0; parameters = getStatementParameters(); if (parameters == null) parameters = CodeStructure.EMPTY_PARAMS; } public boolean hasNext() { return index < parameters.length; } public Object next() { if (!hasNext()) throw new java.util.NoSuchElementException(); Object obj = index > -1 ? parameters[index] : getParentExpression(); index++; return obj; } public void remove() { throw new UnsupportedOperationException(); } } } |
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