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1 package org.sapia.regis.loader;
2
3 import java.io.ByteArrayInputStream  ;
4 import java.io.File ;
5 import java.io.FileInputStream ;
6 import java.io.IOException ;
7 import java.io.InputStream ;
8 import java.util.Collections ;
9 import java.util.HashMap ;
10 import java.util.Map ;
11
12 import org.sapia.regis.DuplicateNodeException;
13 import org.sapia.regis.RWNode;
14 import org.sapia.regis.util.Utils;
15 import org.sapia.util.text.MapContext;
16 import org.sapia.util.text.SystemContext;
17 import org.sapia.util.text.TemplateContextIF;
18 import org.sapia.util.text.TemplateElementIF;
19 import org.sapia.util.text.TemplateFactory;
20 import org.sapia.util.xml.confix.CreationStatus;
21 import org.sapia.util.xml.confix.Dom4jProcessor;
22 import org.sapia.util.xml.confix.ObjectCreationException;
23 import org.sapia.util.xml.confix.ReflectionFactory;
24
25 public class RegistryConfigLoader {
26
27 private RWNode _root;
28
29 public RegistryConfigLoader(RWNode root){
30 _root = root;
31 }
32
33 public void load(File file, Map vars) throws IOException , DuplicateNodeException, Exception {
34 doLoad(new FileInputStream (file), vars);
35 }
36
37 public void load(File file) throws IOException , DuplicateNodeException, Exception {
38 doLoad(new FileInputStream (file), Collections.EMPTY_MAP);
39 }
40
41 public void load(InputStream is, Map vars) throws IOException , DuplicateNodeException, Exception {
42 doLoad(is, vars);
43 }
44
45 public void load(InputStream is) throws IOException , DuplicateNodeException, Exception {
46 doLoad(is, Collections.EMPTY_MAP);
47 }
48
49 private RegistryTag doLoad(InputStream is, Map vars)
50 throws IOException , DuplicateNodeException, Exception {
51
52 try{
53 String content = Utils.loadAsString(is);
54 TemplateFactory tmplFac = new TemplateFactory("$[", "]");
55 TemplateElementIF template = tmplFac.parse(content);
56 TemplateContextIF ctx = new MapContext(vars, new SystemContext(), false);
57 content = template.render(ctx);
58 ConfigObjectFactory fac = new ConfigObjectFactory(ctx);
59 Dom4jProcessor proc = new Dom4jProcessor(fac);
60 is = new ByteArrayInputStream (content.getBytes());
61 RegistryTag conf = (RegistryTag)proc.process(is);
62 conf.create(_root);
63 return conf;
64 }finally{
65 is.close();
66 }
67 }
68
69 public static final class ConfigObjectFactory extends ReflectionFactory{
70
71 static final String REGISTRY = "registry";
72
73 static final Map CLASSES = new HashMap ();
74
75 static{
76
77 CLASSES.put("choose", ChooseTag.class);
78 CLASSES.put("if", IfTag.class);
79 CLASSES.put("include", IncludeTag.class);
80 CLASSES.put("link", LinkTag.class);
81 CLASSES.put("node", NodeTag.class);
82 CLASSES.put("paramRef", ParamRefTag.class);
83 CLASSES.put("property", PropertyTag.class);
84 CLASSES.put("registry", RegistryTag.class);
85 CLASSES.put("unless", UnlessTag.class);
86 }
87
88 private TemplateContextIF _ctx;
89
90 public ConfigObjectFactory(TemplateContextIF ctx){
91 super(new String [0]);
92 _ctx = ctx;
93 }
94
95 public CreationStatus newObjectFor(String prefix, String uri, String name, Object parent) throws ObjectCreationException {
96 Class clazz = (Class )CLASSES.get(name);
97 if(clazz == null){
98 return super.newObjectFor(prefix, uri, name, parent);
99 }
100 else{
101 try{
102 Object instance = clazz.newInstance();
103 if(instance instanceof TagFactory){
104 instance = ((TagFactory)instance).create(_ctx, this);
105 }
106 if(instance instanceof TagNameAware){
107 ((TagNameAware)instance).setTagName(name);
108 }
109 return CreationStatus.create(instance);
110 }catch(Exception e){
111 throw new ObjectCreationException("Could not create object for: " + name, e);
112 }
113 }
114 }
115 }
116
117 }
118 |
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