01: /*
02: * IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
03: *
04: * http://izpack.org/
05: * http://izpack.codehaus.org/
06: *
07: * Copyright 2007 Dennis Reil
08: *
09: * Licensed under the Apache License, Version 2.0 (the "License");
10: * you may not use this file except in compliance with the License.
11: * You may obtain a copy of the License at
12: *
13: * http://www.apache.org/licenses/LICENSE-2.0
14: *
15: * Unless required by applicable law or agreed to in writing, software
16: * distributed under the License is distributed on an "AS IS" BASIS,
17: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18: * See the License for the specific language governing permissions and
19: * limitations under the License.
20: */
21: package com.izforge.izpack.rules;
22:
23: import net.n3.nanoxml.XMLElement;
24:
25: /**
26: * References an already defined condition
27: *
28: * @author Dennis Reil, <Dennis.Reil@reddot.de>
29: */
30: public class RefCondition extends Condition {
31:
32: /**
33: *
34: */
35: private static final long serialVersionUID = -2880915036530702269L;
36: Condition referencedcondition;
37:
38: public RefCondition() {
39: this .referencedcondition = null;
40: }
41:
42: /*
43: * public boolean isTrue(Properties variables) { if (referencedcondition == null) { return
44: * false; } else { return referencedcondition.isTrue(variables); } }
45: */
46: public void readFromXML(XMLElement xmlcondition) {
47: String refid = xmlcondition.getAttribute("refid");
48: this .referencedcondition = RulesEngine.getCondition(refid);
49: }
50:
51: public boolean isTrue() {
52: if (this .referencedcondition == null) {
53: return false;
54: } else {
55: return this .referencedcondition.isTrue();
56: }
57: }
58:
59: /* (non-Javadoc)
60: * @see com.izforge.izpack.rules.Condition#getDependenciesDetails()
61: */
62: public String getDependenciesDetails() {
63: StringBuffer details = new StringBuffer();
64: details.append(this .id);
65: details.append(" depends on:<ul><li>");
66: details.append(referencedcondition.getDependenciesDetails());
67: details.append("</li></ul>");
68: return details.toString();
69: }
70: }
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