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1 package com.tirsen.nanning.attribute;
2
3 import java.io.IOException  ;
4 import java.io.InputStream ;
5 import java.io.FileInputStream ;
6 import java.util.Properties ;
7 import java.net.MalformedURLException ;
8
9 import org.apache.commons.digester.Digester;
10 import org.xml.sax.SAXException ;
11
12 public class AttributesXMLParser implements AttributesLoader {
13 private String fieldName;
14 private String methodName;
15 private String argumentList;
16 private ClassPropertiesHelper classPropertiesHelper;
17
18 public void load(ClassAttributes classAttributes) {
19 this.classPropertiesHelper = new ClassPropertiesHelper(classAttributes);
20 Class aClass = classAttributes.getAttributeClass();
21 InputStream input = null;
22 try {
23 input = Attributes.findFile(aClass, classPropertiesHelper.getClassName() + ".xml");
25 if (input == null) {
26 input = Attributes.findFile(aClass, aClass.getName().replace('.', '/') + ".xml");
27 }
28
29 if (input != null) {
30 parse(input);
31 }
32
33 } catch (MalformedURLException e) {
34 throw new AttributeException("Error fetching properties for " + aClass, e);
35 } catch (IOException e) {
36 throw new AttributeException("Error fetching properties for " + aClass, e);
37 } catch (AttributeException e) {
38 throw e;
39 } catch (Exception e) {
40 throw new AttributeException("Error fetching properties for " + aClass, e);
41 } finally {
42 if (input != null) {
43 try {
44 input.close();
45 } catch (IOException e) {
46 throw new AttributeException(e);
47 }
48 }
49 }
50 }
51
52 private void parse(InputStream input) throws IOException , SAXException {
53 Digester digester = new Digester();
54
55 digester.addCallMethod("*/attribute", "setAttributeValue", 2);
56 digester.addCallParam("*/attribute/name", 0);
57 digester.addCallParam("*/attribute/value", 1);
58
59 digester.addSetProperties("attributes/method", "name", "methodName");
60 digester.addCallMethod("attributes/method/parameter-type", "addArgumentType", 0);
61
62 digester.addSetProperties("attributes/field", "name", "fieldName");
63
64 digester.push(this);
65 digester.parse(input);
66 }
67
68 public void setAttributeValue(String name, String value) {
69 if (fieldName != null) {
70 classPropertiesHelper.loadFieldAttribute(fieldName, name, value);
71
72 } else if (methodName != null) {
73 String methodSignature = methodName + "(" + ((argumentList == null) ? "" : argumentList) + ")";
74 classPropertiesHelper.loadMethodAttribute(methodSignature, name, value);
75
76 } else {
77 classPropertiesHelper.loadClassAttribute(name, value);
78
79 }
80 fieldName = null;
81 methodName = null;
82 argumentList = null;
83 }
84
85 public void setFieldName(String name) {
86 fieldName = name;
87 }
88
89 public void setMethodName(String name) {
90 methodName = name;
91 }
92
93 public void addArgumentType(String type) {
94 if (argumentList == null) {
95 argumentList = type;
96 } else {
97 argumentList += ",";
98 argumentList += type;
99 }
100 }
101 }
102
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Java API By Example, From Geeks To Geeks.