1 /*
2 * Copyright (c) 2003, Henri Yandell
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or
6 * without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * + Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * + Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * + Neither the name of OSJava nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32 package com.generationjava.config;
33
34 import java.util.ArrayList;
35 import java.util.List;
36 import java.util.Date;
37
38 public abstract class AbstractConfig implements Config {
39
40 private String context = "";
41
42 protected abstract Object getValue(String key);
43
44 public Object get(String key) {
45 return getValue( getContext()+key );
46 }
47
48 public boolean has(String key) {
49 return (get(key) != null);
50 }
51
52 public Object getAbsolute(String key) {
53 return getValue(key);
54 }
55
56 public String getString(String key) {
57 return (String)get(key);
58 }
59
60 public Date getDate(String key) {
61 try {
62 return java.text.DateFormat.getDateInstance(java.text.DateFormat.SHORT).parse(key);
63 } catch(java.text.ParseException pe) {
64 return null;
65 }
66 }
67
68 // rely on simple-jndi's type
69 public int getInt(String key) {
70 try {
71 return Integer.parseInt( getString(key) );
72 } catch(NumberFormatException nfe) {
73 return 0;
74 }
75 }
76
77 public double getDouble(String key) {
78 try {
79 return Double.parseDouble( getString(key) );
80 } catch(NumberFormatException nfe) {
81 return 0.0;
82 }
83 }
84
85 public List getList(String key) {
86 Object obj = get(key);
87 if(!(obj instanceof List)) {
88 List list = new ArrayList(1);
89 list.add(obj);
90 obj = list;
91 }
92 return (List)obj;
93 }
94
95 public void setContext(String context) {
96 this.context = context;
97 }
98
99 public void pushToContext(String contextElement) {
100 this.context = this.context + contextElement;
101 }
102
103 public void popFromContext(String contextElement) {
104 if(this.context.endsWith(contextElement)) {
105 this.context = this.context.substring(0, this.context.length() - contextElement.length());
106 } else {
107 throw new IllegalArgumentException("Context does not end with: "+contextElement);
108 }
109 }
110
111 public String getContext() {
112 return this.context;
113 }
114
115 public Config cloneConfig() {
116 try {
117 return (Config)this.clone();
118 } catch(CloneNotSupportedException cnse) {
119 // ignore
120 throw new RuntimeException("Cloning of a Config failed. This should be impossible. ");
121 }
122 }
123
124 }