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.compiler.ExecutableStatement;
21: import org.mvel.integration.VariableResolverFactory;
22: import static org.mvel.util.ParseTools.subCompileExpression;
23:
24: /**
25: * @author Christopher Brock
26: */
27: public class WhileNode extends BlockNode {
28: protected String item;
29:
30: // protected char[] cond;
31: protected ExecutableStatement condition;
32: protected ExecutableStatement compiledBlock;
33:
34: public WhileNode(char[] condition, char[] block, int fields) {
35: // super(condition, fields);
36:
37: this .condition = (ExecutableStatement) subCompileExpression(this .name = condition);
38: this .compiledBlock = (ExecutableStatement) subCompileExpression(this .block = block);
39: }
40:
41: public Object getReducedValueAccelerated(Object ctx,
42: Object this Value, VariableResolverFactory factory) {
43: while ((Boolean) condition.getValue(ctx, this Value, factory)) {
44: compiledBlock.getValue(ctx, this Value, factory);
45: }
46:
47: return null;
48: }
49:
50: public Object getReducedValue(Object ctx, Object this Value,
51: VariableResolverFactory factory) {
52:
53: while ((Boolean) condition.getValue(ctx, thisValue, factory)) {
54: compiledBlock.getValue(ctx, thisValue, factory);
55: }
56: return null;
57: }
58:
59: }
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