1 | /*
|
---|
2 | * Copyright 2005 Paul Hinds
|
---|
3 | *
|
---|
4 | * Licensed under the Apache License, Version 2.0 (the "License");
|
---|
5 | * you may not use this file except in compliance with the License.
|
---|
6 | * You may obtain a copy of the License at
|
---|
7 | *
|
---|
8 | * http://www.apache.org/licenses/LICENSE-2.0
|
---|
9 | *
|
---|
10 | * Unless required by applicable law or agreed to in writing, software
|
---|
11 | * distributed under the License is distributed on an "AS IS" BASIS,
|
---|
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
---|
13 | * See the License for the specific language governing permissions and
|
---|
14 | * limitations under the License.
|
---|
15 | */
|
---|
16 | package org.tp23.antinstaller.runtime;
|
---|
17 |
|
---|
18 | import org.tp23.antinstaller.InstallException;
|
---|
19 | import org.tp23.antinstaller.InstallerContext;
|
---|
20 | import org.tp23.antinstaller.page.Page;
|
---|
21 | import org.tp23.antinstaller.page.SimpleInputPage;
|
---|
22 | import org.tp23.antinstaller.runtime.logic.Expression;
|
---|
23 | import org.tp23.antinstaller.runtime.logic.ExpressionBuilder;
|
---|
24 |
|
---|
25 |
|
---|
26 | /**
|
---|
27 | * <p>Encapsulates code fo the ifProperty feature</p>
|
---|
28 | * N.B. It is the installer generator's responsibility to ensure that properties passed
|
---|
29 | * to the less than or greater than test are valid Numbers.
|
---|
30 | * The internal Java format used is a Double so avalid regex would be
|
---|
31 | * something like [0-9]+\.*[0-9]* or [0-9]+ for an Integer.
|
---|
32 | * The rather strange -= and += syntax is used because > and <
|
---|
33 | * must be escaped to &gt; and &lt; in XML attributes and the legibility
|
---|
34 | * of the configuration files would be impared.
|
---|
35 | * REF: 1145496
|
---|
36 | * @author Paul Hinds
|
---|
37 | * @version $Id: IfPropertyHelper.java,v 1.5 2007/01/19 00:24:36 teknopaul Exp $
|
---|
38 | */
|
---|
39 | public class IfPropertyHelper {
|
---|
40 |
|
---|
41 | private InstallerContext ctx = null;
|
---|
42 | public IfPropertyHelper(InstallerContext ctx){
|
---|
43 | this.ctx = ctx;
|
---|
44 | }
|
---|
45 |
|
---|
46 | /**
|
---|
47 | * @return boolean true to SHOW the page
|
---|
48 | */
|
---|
49 | public boolean ifProperty(Page next) throws InstallException {
|
---|
50 | // show page if ifProperty is specified and property is correct
|
---|
51 | if(next instanceof SimpleInputPage) {
|
---|
52 | SimpleInputPage conditionalPage = (SimpleInputPage) next;
|
---|
53 | String ifProperty = conditionalPage.getIfProperty();
|
---|
54 | if (ifProperty != null) {
|
---|
55 | Expression expression;
|
---|
56 | try {
|
---|
57 | expression = ExpressionBuilder.parseLogicalExpressions( ctx.getInstaller().getResultContainer(),
|
---|
58 | ifProperty );
|
---|
59 | }
|
---|
60 | catch( ConfigurationException configExc ) {
|
---|
61 | throw new InstallException( "Error parsing ifProperty condition for page " + next.getName(),
|
---|
62 | configExc );
|
---|
63 | }
|
---|
64 | return expression.evaluate();
|
---|
65 | }
|
---|
66 |
|
---|
67 | }
|
---|
68 | return true; // show the page by default
|
---|
69 | }
|
---|
70 |
|
---|
71 | /**
|
---|
72 | * @return boolean true to SHOW the page
|
---|
73 | */
|
---|
74 | public boolean ifTarget(Page next, Page[] pages){
|
---|
75 | // skip iftarget specified and target is missing
|
---|
76 | if(next instanceof SimpleInputPage){
|
---|
77 | SimpleInputPage conditionalPage = (SimpleInputPage) next;
|
---|
78 | String ifTarget = conditionalPage.getIfTarget();
|
---|
79 | if (ifTarget != null) {
|
---|
80 | boolean show = false;
|
---|
81 | for (int p = 0; p < pages.length; p++) {
|
---|
82 | show |= pages[p].isTarget(ifTarget);
|
---|
83 | }
|
---|
84 | return show;
|
---|
85 | }
|
---|
86 | }
|
---|
87 | return true;
|
---|
88 | }
|
---|
89 | }
|
---|