01: /*******************************************************************************
02: * Licensed to the Apache Software Foundation (ASF) under one
03: * or more contributor license agreements. See the NOTICE file
04: * distributed with this work for additional information
05: * regarding copyright ownership. The ASF licenses this file
06: * to you under the Apache License, Version 2.0 (the
07: * "License"); you may not use this file except in compliance
08: * with the License. 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,
13: * software distributed under the License is distributed on an
14: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15: * KIND, either express or implied. See the License for the
16: * specific language governing permissions and limitations
17: * under the License.
18: *******************************************************************************/package org.ofbiz.minilang.method.conditional;
19:
20: import java.util.*;
21:
22: import org.w3c.dom.*;
23: import org.ofbiz.base.util.*;
24: import org.ofbiz.minilang.*;
25: import org.ofbiz.minilang.method.*;
26: import org.ofbiz.minilang.method.conditional.Conditional;
27: import org.ofbiz.minilang.method.conditional.ConditionalFactory;
28:
29: /**
30: * Continually processes sub-ops while the condition remains true
31: */
32: public class While extends MethodOperation {
33:
34: Conditional condition;
35:
36: List thenSubOps = new LinkedList();
37:
38: public While(Element element, SimpleMethod simpleMethod) {
39: super (element, simpleMethod);
40:
41: Element conditionElement = UtilXml.firstChildElement(element,
42: "condition");
43: Element conditionChildElement = UtilXml
44: .firstChildElement(conditionElement);
45: this .condition = ConditionalFactory.makeConditional(
46: conditionChildElement, simpleMethod);
47:
48: Element thenElement = UtilXml
49: .firstChildElement(element, "then");
50: SimpleMethod.readOperations(thenElement, thenSubOps,
51: simpleMethod);
52: }
53:
54: public boolean exec(MethodContext methodContext) {
55: // if conditions fails, always return true;
56: // if a sub-op returns false return false and stop, otherwise drop though loop and return true
57: while (condition.checkCondition(methodContext)) {
58: boolean runSubOpsResult = SimpleMethod.runSubOps(
59: thenSubOps, methodContext);
60: if (!runSubOpsResult) {
61: return false;
62: }
63: }
64: return true;
65: }
66:
67: public String rawString() {
68: return expandedString(null);
69: }
70:
71: public String expandedString(MethodContext methodContext) {
72: // TODO: fill in missing details, if needed
73: StringBuffer messageBuf = new StringBuffer();
74: this .condition.prettyPrint(messageBuf, methodContext);
75: return "<while><condition>" + messageBuf
76: + "</condition></while>";
77: }
78: }
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