Mercurial > dive4elements > river

comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java @ 430:7ab81ff32111 2.3

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merged flys-artifacts/2.3
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:10 +0200
parents 24b53f9aa9dc
children db8d93cb65fd
comparison
equal deleted inserted replaced
290:a6f56ed9238b 430:7ab81ff32111
1 package de.intevation.flys.artifacts.services;
2
3 import java.io.InputStream;
4 import java.io.IOException;
5
6 import java.sql.Connection;
7 import java.sql.SQLException;
8
9 import org.w3c.dom.Document;
10
11 import org.apache.log4j.Logger;
12
13 import java.util.Map;
14 import java.util.HashMap;
15
16 import de.intevation.artifacts.CallMeta;
17 import de.intevation.artifacts.ServiceFactory;
18
19 import de.intevation.artifactdatabase.DefaultService;
20
21 import de.intevation.artifacts.common.utils.XMLUtils;
22
23 import de.intevation.artifacts.common.ArtifactNamespaceContext;
24
25 import de.intevation.flys.artifacts.services.meta.Builder;
26
27 import de.intevation.flys.backend.SessionHolder;
28
29 import org.hibernate.Session;
30
31 import org.hibernate.jdbc.Work;
32
33 public class MetaDataService
34 extends DefaultService
35 {
36 private static Logger log = Logger.getLogger(MetaDataService.class);
37
38 public static final String XPATH_RIVER = "/art:river/text()";
39
40 public static final String META_DATA_TEMPLATE = "/metadata/template.xml";
41
42 protected Builder builder;
43
44 public MetaDataService() {
45 }
46
47 protected static Map<String, Object> extractParameters(Document data) {
48 HashMap<String, Object> parameters = new HashMap<String, Object>();
49
50 String river = XMLUtils.xpathString(
51 data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE);
52
53 if (river == null || (river = river.trim()).length() == 0) {
54 river = "%"; // matches all rivers
55 }
56
57 parameters.put("river", river);
58
59 return parameters;
60 }
61
62 @Override
63 public Document process(
64 Document data,
65 Object globalContext,
66 CallMeta callMeta
67 ) {
68 log.debug("MetaDataService.process");
69
70 final Document result = XMLUtils.newDocument();
71
72 if (builder == null) {
73 log.error("MetaDataService is not setup properly.");
74 return result;
75 }
76
77 final Map<String, Object> parameters = extractParameters(data);
78
79 Session session = SessionHolder.acquire();
80 try {
81 session.doWork(new Work() {
82 @Override
83 public void execute(Connection connection)
84 throws SQLException
85 {
86 log.debug("MetaDataService.execute");
87 builder.build(connection, result, parameters);
88 }
89 });
90 }
91 finally {
92 session.close();
93 SessionHolder.release();
94 }
95
96 return result;
97 }
98
99 @Override
100 public void setup(ServiceFactory factory, Object globalContext) {
101 log.debug("MetaDataService.setup");
102
103 InputStream in = getClass().getResourceAsStream(META_DATA_TEMPLATE);
104
105 if (in == null) {
106 log.error("cannot get template resource");
107 return;
108 }
109
110 try {
111 Document template = XMLUtils.parseDocument(in);
112 if (template == null) {
113 log.error("cannot parse meta data template");
114 }
115 else {
116 builder = new Builder(template);
117 }
118 }
119 finally {
120 try {
121 in.close();
122 }
123 catch (IOException ioe) {
124 log.error(ioe);
125 }
126 }
127 }
128 }
129 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org