| /******************************************************************************* |
| * 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; |
| |
| /** |
| * A MatchIteratorFilter controlled by an expression |
| */ |
| public class CollectIterator implements Iterator { |
| private final Expression expression; |
| |
| private final ExpressionContext context; |
| |
| private final VariableScope scope; |
| |
| private final EachVariable variable; |
| |
| private final Iterator innerIterator; |
| |
| public CollectIterator(ExpressionContext context, VariableScope scope, EachVariable variable, Iterator iterator, Expression expression) { |
| this.expression = expression; |
| this.context = context; |
| this.scope = scope; |
| this.variable = variable; |
| this.innerIterator = iterator; |
| } |
| |
| public boolean hasNext() { |
| return innerIterator.hasNext(); |
| } |
| |
| public Object next() { |
| variable.setValue(scope, innerIterator.next()); |
| return expression.evaluate(context, scope); |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| } |