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1
23
24 package org.objectweb.fractal.gui.repository.lib;
25
26 import java.io.File  ;
27 import java.io.FileInputStream ;
28 import java.io.FileWriter ;
29 import java.io.InputStream ;
30
31 import org.objectweb.fractal.adl.ADLException;
32 import org.objectweb.fractal.adl.Node;
33 import org.objectweb.fractal.adl.Parser;
34 import org.objectweb.fractal.adl.xml.XMLParser;
35 import org.objectweb.fractal.adl.xml.XMLWriter;
36 import org.objectweb.fractal.gui.repository.api.Storage;
37
38
44
45 public class XMLFileStorage implements Storage {
46
47 static String FS = new String (System.getProperty ("file.separator"));
48
49
52
53 private String storage;
54
55 private Parser parser = new XMLParser();
56
57 public void open (final String storage)
58 throws Exception
59 {
60 if (this.storage != null) {
61 throw new Exception ("Storage already opened");
62 }
63 this.storage = storage;
64 }
65
66 public Object load (final String name) throws Exception {
67 if (storage == null) {
68 throw new Exception ("Storage not opened");
69 }
70 String n = name.replace('.', '/') + ".fractal";
71 File f = new File (storage, n);
72 InputStream is = null;
73 if (f.exists()) {
74 is = new FileInputStream (f);
75 } else {
76 ClassLoader cl = getClass().getClassLoader();
77 if (cl == null) {
78 cl = ClassLoader.getSystemClassLoader();
79 }
80 is = cl.getResourceAsStream(n);
81 }
82 if (is == null) {
83 throw new ADLException("Cannot find '" + name + "' in the storage or in the classpath", null);
84 }
85 try {
86 return parser.parse(is, f.getAbsolutePath());
87 } finally {
88 is.close();
89 }
90 }
91
92 public void store (final String name, final Object value) throws Exception {
93 if (storage == null) {
94 throw new Exception ("Storage not opened");
95 }
96 String n = name.replace('.', '/') + ".fractal";
97 File f = new File (storage, n);
98 if (!f.getParentFile().exists()) {
99 f.getParentFile().mkdirs();
100 }
101 FileWriter pw = new FileWriter (f);
102 pw.write("<?xml version=\"1.0\" encoding=\"ISO-8859-1\" ?>\n");
103 pw.write("<!DOCTYPE definition PUBLIC \"-//objectweb.org//DTD Fractal ADL 2.0//EN\" \"classpath://org/objectweb/fractal/adl/xml/standard.dtd\">\n\n");
104 XMLWriter xmlw = new XMLWriter(pw);
105 xmlw.write((Node)value);
106 pw.close();
107 }
108
109 public void close () throws Exception {
110 if (storage == null) {
111 throw new Exception ("Storage not opened");
112 }
113 storage = null;
114 }
115 }
116 |
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