01: /**
02: * MVEL (The MVFLEX Expression Language)
03: *
04: * Copyright (C) 2007 Christopher Brock, MVFLEX/Valhalla Project and the Codehaus
05: *
06: * Licensed under the Apache License, Version 2.0 (the "License");
07: * you may not use this file except in compliance with the License.
08: * You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing, software
13: * distributed under the License is distributed on an "AS IS" BASIS,
14: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15: * See the License for the specific language governing permissions and
16: * limitations under the License.
17: *
18: */package org.mvel.ast;
19:
20: import org.mvel.PropertyAccessor;
21: import org.mvel.compiler.Accessor;
22: import org.mvel.integration.VariableResolverFactory;
23: import org.mvel.optimizers.AccessorOptimizer;
24: import org.mvel.optimizers.OptimizerFactory;
25:
26: public class Union extends ASTNode {
27: private ASTNode main;
28: private transient Accessor accessor;
29:
30: public Union(char[] expr, int start, int end, int fields,
31: ASTNode main) {
32: super (expr, start, end, fields);
33: this .main = main;
34: }
35:
36: public Object getReducedValueAccelerated(Object ctx,
37: Object this Value, VariableResolverFactory factory) {
38: if (accessor != null) {
39: return accessor.getValue(main.getReducedValueAccelerated(
40: ctx, this Value, factory), this Value, factory);
41: } else {
42: AccessorOptimizer o = OptimizerFactory
43: .getThreadAccessorOptimizer();
44: accessor = o.optimizeAccessor(name,
45: main.getReducedValueAccelerated(ctx, this Value,
46: factory), this Value, factory, false);
47: return o.getResultOptPass();
48: }
49: }
50:
51: public Object getReducedValue(Object ctx, Object this Value,
52: VariableResolverFactory factory) {
53: return PropertyAccessor.get(name, main.getReducedValue(ctx,
54: this Value, factory), factory, this Value);
55: }
56:
57: public String toString() {
58: return main.toString() + "-[union]->" + accessor.toString();
59: }
60: }
|