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1
11 package org.eclipse.core.internal.resources;
12
13 import java.io.IOException  ;
14 import java.io.InputStream ;
15 import java.util.ArrayList ;
16 import java.util.List ;
17 import javax.xml.parsers.*;
18 import org.eclipse.core.internal.localstore.SafeFileInputStream;
19 import org.eclipse.core.internal.utils.Messages;
20 import org.eclipse.core.internal.utils.Policy;
21 import org.eclipse.core.resources.IResourceStatus;
22 import org.eclipse.core.runtime.IPath;
23 import org.eclipse.osgi.util.NLS;
24 import org.w3c.dom.*;
25 import org.xml.sax.SAXException ;
26
27
31 public class WorkspaceDescriptionReader implements IModelObjectConstants {
32
33 protected static final String [] EMPTY_STRING_ARRAY = new String [0];
34
35 public WorkspaceDescriptionReader() {
36 super();
37 }
38
39 protected String getString(Node target, String tagName) {
40 Node node = searchNode(target, tagName);
41 return node != null ? (node.getFirstChild() == null ? null : node.getFirstChild().getNodeValue()) : null;
42 }
43
44 protected String [] getStrings(Node target) {
45 if (target == null)
46 return null;
47 NodeList list = target.getChildNodes();
48 if (list.getLength() == 0)
49 return EMPTY_STRING_ARRAY;
50 List result = new ArrayList (list.getLength());
51 for (int i = 0; i < list.getLength(); i++) {
52 Node node = list.item(i);
53 if (node.getNodeType() == Node.ELEMENT_NODE)
54 result.add(read(node.getChildNodes().item(0)));
55 }
56 return (String []) result.toArray(new String [result.size()]);
57 }
58
59
63 private void logNumberFormatException(String value, NumberFormatException e) {
64 String msg = NLS.bind(Messages.resources_readWorkspaceMetaValue, value);
65 Policy.log(new ResourceStatus(IResourceStatus.FAILED_READ_METADATA, null, msg, e));
66 }
67
68 public Object read(InputStream input) {
69 try {
70 DocumentBuilder parser = DocumentBuilderFactory.newInstance().newDocumentBuilder();
71 Document document = parser.parse(input);
72 return read(document.getFirstChild());
73 } catch (IOException e) {
74 } catch (SAXException e) {
76 } catch (ParserConfigurationException e) {
78 }
80 return null;
81 }
82
83 public Object read(IPath location, IPath tempLocation) throws IOException {
84 SafeFileInputStream file = new SafeFileInputStream(location.toOSString(), tempLocation.toOSString());
85 try {
86 return read(file);
87 } finally {
88 file.close();
89 }
90 }
91
92 protected Object read(Node node) {
93 if (node == null)
94 return null;
95 switch (node.getNodeType()) {
96 case Node.ELEMENT_NODE :
97 if (node.getNodeName().equals(WORKSPACE_DESCRIPTION))
98 return readWorkspaceDescription(node);
99 case Node.TEXT_NODE :
100 String value = node.getNodeValue();
101 return value == null ? null : value.trim();
102 default :
103 return node.toString();
104 }
105 }
106
107
110 protected WorkspaceDescription readWorkspaceDescription(Node node) {
111 String name = getString(node, NAME);
113 String autobuild = getString(node, AUTOBUILD);
114 String snapshotInterval = getString(node, SNAPSHOT_INTERVAL);
115 String fileStateLongevity = getString(node, FILE_STATE_LONGEVITY);
116 String maxFileStateSize = getString(node, MAX_FILE_STATE_SIZE);
117 String maxFileStates = getString(node, MAX_FILE_STATES);
118 String [] buildOrder = getStrings(searchNode(node, BUILD_ORDER));
119
120 WorkspaceDescription description = new WorkspaceDescription(name);
123 if (autobuild != null)
124 description.setAutoBuilding(!autobuild.equals(Integer.toString(0)));
126 try {
127 if (fileStateLongevity != null)
128 description.setFileStateLongevity(Long.parseLong(fileStateLongevity));
129 } catch (NumberFormatException e) {
130 logNumberFormatException(fileStateLongevity, e);
131 }
132 try {
133 if (maxFileStateSize != null)
134 description.setMaxFileStateSize(Long.parseLong(maxFileStateSize));
135 } catch (NumberFormatException e) {
136 logNumberFormatException(maxFileStateSize, e);
137 }
138 try {
139 if (maxFileStates != null)
140 description.setMaxFileStates(Integer.parseInt(maxFileStates));
141 } catch (NumberFormatException e) {
142 logNumberFormatException(maxFileStates, e);
143 }
144 if (buildOrder != null)
145 description.internalSetBuildOrder(buildOrder);
146 try {
147 if (snapshotInterval != null)
148 description.setSnapshotInterval(Long.parseLong(snapshotInterval));
149 } catch (NumberFormatException e) {
150 logNumberFormatException(snapshotInterval, e);
151 }
152 return description;
153 }
154
155 protected Node searchNode(Node target, String tagName) {
156 NodeList list = target.getChildNodes();
157 for (int i = 0; i < list.getLength(); i++) {
158 if (list.item(i).getNodeName().equals(tagName))
159 return list.item(i);
160 }
161 return null;
162 }
163 }
164 |
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