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1
56 package org.objectstyle.cayenne.access.jdbc;
57
58 import java.io.ByteArrayInputStream  ;
59 import java.io.InputStream ;
60 import java.util.Map ;
61
62 import org.apache.commons.collections.ExtendedProperties;
63 import org.apache.commons.collections.map.LRUMap;
64 import org.apache.velocity.Template;
65 import org.apache.velocity.exception.ParseErrorException;
66 import org.apache.velocity.exception.ResourceNotFoundException;
67 import org.apache.velocity.runtime.RuntimeServices;
68 import org.apache.velocity.runtime.resource.Resource;
69 import org.apache.velocity.runtime.resource.ResourceManager;
70 import org.apache.velocity.runtime.resource.loader.ResourceLoader;
71
72
79 public class SQLTemplateResourceManager
81 extends ResourceLoader
82 implements ResourceManager {
83
84 protected Map templateCache;
85
86 public void initialize(RuntimeServices rs) throws Exception {
87 super.rsvc = rs;
88 this.templateCache = new LRUMap(100);
89 }
90
91 public void clearCache() {
92 templateCache.clear();
93 }
94
95
98 public Resource getResource(String resourceName, int resourceType, String encoding)
99 throws ResourceNotFoundException, ParseErrorException, Exception {
100
101 synchronized (templateCache) {
102 Template resource = (Template) templateCache.get(resourceName);
103
104 if (resource == null) {
105 resource = new Template();
106 resource.setRuntimeServices(rsvc);
107 resource.setResourceLoader(this);
108 resource.setName(resourceName);
109 resource.setEncoding(encoding);
110 resource.process();
111
112 templateCache.put(resourceName, resource);
113 }
114
115 return resource;
116 }
117 }
118
119 public String getLoaderNameForResource(String resourceName) {
120 return getClass().getName();
121 }
122
123 public long getLastModified(Resource resource) {
124 return -1;
125 }
126
127 public InputStream getResourceStream(String source)
128 throws ResourceNotFoundException {
129 return new ByteArrayInputStream (source.getBytes());
130 }
131
132 public void init(ExtendedProperties configuration) {
133
134 }
135
136 public boolean isSourceModified(Resource resource) {
137 return false;
138 }
139 }
140 |
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