source: trunk/gsdl3/src/java/org/greenstone/gsdl3/util/GS2MacroResolver.java@ 8827

Last change on this file since 8827 was 8827, checked in by kjdon, 19 years ago

small change, testing for null things
  • Property svn:keywords set to Author Date Id Revision
File size: 3.3 KB
Line 
1package org.greenstone.gsdl3.util;
2
3import java.util.ArrayList;
4import org.greenstone.gdbm.GDBMWrapper;
5import org.greenstone.gdbm.DBInfo;
6
7public class GS2MacroResolver {
8
9 public static final String SCOPE_TEXT = "text";
10 public static final String SCOPE_META = "metadata";
11 public static final String SCOPE_ALL = "all";
12
13 public static final int TYPE_TEXT = 0;
14 public static final int TYPE_META = 1;
15 public static final int TYPE_DICT = 2;
16
17 protected ArrayList text_macros = null;
18 protected ArrayList metadata_macros = null;
19 protected GDBMWrapper gdbm_src = null;
20
21 String lang = null;
22 // need to make it not add macros if they are already present
23 public GS2MacroResolver(GDBMWrapper wrapper) {
24 this.text_macros = new ArrayList();
25 this.metadata_macros = new ArrayList();
26 this.gdbm_src = wrapper;
27 }
28
29 public void addMacro(int type, String macro, String text_or_metadata, String scope) {
30 Macro m = new Macro();
31 m.type = type;
32 m.macro = macro;
33 m.text = text_or_metadata;
34 addMacro(m, scope);
35 }
36
37 public void addMacro(int type, String macro, String bundle, String key, String scope) {
38 Macro m = new Macro();
39 m.type = type;
40 m.macro = macro;
41 m.bundle = bundle;
42 m.key = key;
43 addMacro(m, scope);
44 }
45
46 protected void addMacro(Macro m, String scope) {
47
48 if (scope.equals(SCOPE_TEXT)) {
49 this.text_macros.add(m);
50 }
51 else if (scope.equals(SCOPE_META)) {
52 this.metadata_macros.add(m);
53 }
54 else if (scope.equals(SCOPE_ALL)) {
55 this.text_macros.add(m);
56 this.metadata_macros.add(m);
57
58 }
59
60 }
61
62 public String resolve(String text, String lang, String scope, String doc_oid, DBInfo info) {
63 //System.err.println("resolving macros for "+text);
64 if (scope.equals(SCOPE_TEXT) && text_macros.size()==0) return text;
65 if (scope.equals(SCOPE_META) && metadata_macros.size() ==0) return text;
66
67 DBInfo root_info = null;
68 boolean new_lang = false;
69 if (this.lang == null || !this.lang.equals(lang) ) {
70 new_lang = true;
71 this.lang = lang;
72 }
73
74 ArrayList macros;
75 if (scope.equals(SCOPE_TEXT)) {
76 macros = text_macros;
77 } else {
78 macros = metadata_macros;
79 }
80
81 for (int i=0; i<macros.size(); i++) {
82 Macro m = (Macro)macros.get(i);
83 switch (m.type) {
84 case TYPE_DICT:
85 if (m.text==null || new_lang) {
86 Dictionary dict = new Dictionary(m.bundle, lang);
87 m.text = dict.get(m.key, null);
88 }
89 // now drop through to text case
90 case TYPE_TEXT:
91 text = text.replaceAll(m.macro, m.text);
92 break;
93 case TYPE_META:
94 if (text.indexOf(m.macro) != -1) {
95 if (info == null) {
96 info = gdbm_src.getInfo(doc_oid);
97 if (info == null) {
98 break;
99 }
100 }
101 String value = info.getInfo(m.text);
102 if (value != null) {
103 text = text.replaceAll(m.macro, value);
104 } else {
105 // try the root node
106 if (root_info == null && !OID.isTop(doc_oid)) {
107 System.err.println("top="+OID.getTop(doc_oid));
108 root_info = gdbm_src.getInfo(OID.getTop(doc_oid));
109 }
110 if (root_info == null) break;
111 value = root_info.getInfo(m.text);
112 if (value != null) {
113 text = text.replaceAll(m.macro, value);
114 }
115 }
116 }
117
118 break;
119 } // switch
120
121 }
122
123 return text;
124
125 }
126
127
128
129
130 private class Macro {
131
132 public int type;
133 public String macro = null;
134 public String text = null;
135 public String key = null;
136 public String bundle = null;
137
138
139
140 }
141
142
143}
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