PropertyParser.java revision 608:7e06bf1dcb09 
1/*
2 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25package com.sun.corba.se.spi.orb ;
26
27import java.util.List ;
28import java.util.LinkedList ;
29import java.util.Map ;
30import java.util.HashMap ;
31import java.util.Iterator ;
32import java.util.Properties ;
33
34import com.sun.corba.se.impl.orb.ParserAction ;
35import com.sun.corba.se.impl.orb.ParserActionFactory ;
36
37public class PropertyParser {
38    private List actions ;
39
40    public PropertyParser( )
41    {
42        actions = new LinkedList() ;
43    }
44
45    public PropertyParser add( String propName,
46        Operation action, String fieldName )
47    {
48        actions.add( ParserActionFactory.makeNormalAction( propName,
49            action, fieldName ) ) ;
50        return this ;
51    }
52
53    public PropertyParser addPrefix( String propName,
54        Operation action, String fieldName, Class componentType )
55    {
56        actions.add( ParserActionFactory.makePrefixAction( propName,
57            action, fieldName, componentType ) ) ;
58        return this ;
59    }
60
61    /** Return a map from field name to value.
62    */
63    public Map parse( Properties props )
64    {
65        Map map = new HashMap() ;
66        Iterator iter = actions.iterator() ;
67        while (iter.hasNext()) {
68            ParserAction act = (ParserAction)(iter.next()) ;
69
70            Object result = act.apply( props ) ;
71
72            // A null result means that the property was not set for
73            // this action, so do not override the default value in this case.
74            if (result != null)
75                map.put( act.getFieldName(), result ) ;
76        }
77
78        return map ;
79    }
80
81    public Iterator iterator()
82    {
83        return actions.iterator() ;
84    }
85}
86