| /******************************************************************************* |
| * Copyright (c) 2009 Cloudsmith Inc. 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: |
| * Cloudsmith Inc. - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.ql; |
| |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * A MatchIteratorFilter controlled by an expression |
| */ |
| public class ArrayIterator implements Iterator { |
| private final Expression[] expressions; |
| |
| private final ExpressionContext context; |
| |
| private final VariableScope scope; |
| |
| private int pos = -1; |
| |
| public ArrayIterator(ExpressionContext context, VariableScope scope, Expression[] expressions) { |
| this.expressions = expressions; |
| this.context = context; |
| this.scope = scope; |
| } |
| |
| public boolean hasNext() { |
| return pos + 1 < expressions.length; |
| } |
| |
| public Object next() { |
| if (++pos >= expressions.length) { |
| --pos; |
| throw new NoSuchElementException(); |
| } |
| return expressions[pos].evaluate(context, scope); |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| } |