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1
61
62 package org.apache.commons.dbutils;
63
64 import java.io.IOException  ;
65 import java.io.InputStream ;
66 import java.util.HashMap ;
67 import java.util.Map ;
68 import java.util.Properties ;
69
70
78 public class QueryLoader {
79
80
83 private static final QueryLoader instance = new QueryLoader();
84
85
89 public static QueryLoader instance() {
90 return instance;
91 }
92
93
96 private Map queries = new HashMap ();
97
98
101 protected QueryLoader() {
102 super();
103 }
104
105
118 public synchronized Map load(String path) throws IOException {
119
120 Map queryMap = (Map ) this.queries.get(path);
121
122 if (queryMap == null) {
123 queryMap = this.loadQueries(path);
124 this.queries.put(path, queryMap);
125 }
126
127 return queryMap;
128 }
129
130
135 private Map loadQueries(String path) throws IOException {
136 InputStream in = QueryLoader.class.getResourceAsStream(path);
137
138 if (in == null) {
139 throw new IllegalArgumentException (path + " not found.");
140 }
141
142 Properties props = new Properties ();
143 props.load(in);
144
145 return new HashMap (props);
147 }
148
149
153 public synchronized void unload(String path){
154 this.queries.remove(path);
155 }
156
157 }
158 |
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