| /******************************************************************************* |
| * Copyright (c) 2009, 2017 Cloudsmith Inc. and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Cloudsmith Inc. - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.metadata.expression; |
| |
| import java.util.Iterator; |
| import java.util.Set; |
| import org.eclipse.equinox.p2.metadata.expression.IEvaluationContext; |
| |
| /** |
| */ |
| final class Union extends Binary { |
| Union(Expression operand, Expression param) { |
| super(operand, param); |
| } |
| |
| @Override |
| public Object evaluate(IEvaluationContext context) { |
| return evaluateAsIterator(context); |
| } |
| |
| @Override |
| public Iterator<?> evaluateAsIterator(IEvaluationContext context) { |
| @SuppressWarnings("unchecked") |
| Set<Object> resultSet = (Set<Object>) asSet(lhs.evaluate(context), true); |
| Iterator<?> itor = rhs.evaluateAsIterator(context); |
| while (itor.hasNext()) |
| resultSet.add(itor.next()); |
| return RepeatableIterator.create(resultSet); |
| } |
| |
| @Override |
| public int getExpressionType() { |
| return TYPE_UNION; |
| } |
| |
| @Override |
| public String getOperator() { |
| return KEYWORD_UNION; |
| } |
| |
| @Override |
| public int getPriority() { |
| return PRIORITY_COLLECTION; |
| } |
| } |