- /*
- * Copyright 2002-2004 The Apache Software Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.apache.commons.jxpath.ri.compiler;
-
- import org.apache.commons.jxpath.ri.EvalContext;
- import org.apache.commons.jxpath.ri.axes.UnionContext;
-
- /**
- * Implementation of Expression for the operation "|".
- *
- * @author Dmitri Plotnikov
- * @version $Revision: 1.3 $ $Date: 2004/02/29 14:17:39 $
- */
- public class CoreOperationUnion extends CoreOperation {
-
- public CoreOperationUnion(Expression args[]) {
- super(args);
- }
-
- public Object computeValue(EvalContext context) {
- EvalContext argCtxs[] = new EvalContext[args.length];
- for (int i = 0; i < args.length; i++) {
- Object value = args[i].compute(context);
- if (value instanceof EvalContext) {
- argCtxs[i] = (EvalContext) value;
- }
- else {
- argCtxs[i] = context.getRootContext().getConstantContext(value);
- }
- }
- return new UnionContext(context.getRootContext(), argCtxs);
- }
-
- protected int getPrecedence() {
- return 7;
- }
-
- protected boolean isSymmetric() {
- return true;
- }
-
- public String getSymbol() {
- return "|";
- }
- }