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1 package com.opensymphony.webwork.config_browser;
2
3 import com.opensymphony.xwork.util.OgnlUtil;
4 import com.opensymphony.xwork.validator.Validator;
5 import ognl.Ognl;
6 import ognl.OgnlException;
7 import org.apache.commons.logging.Log;
8 import org.apache.commons.logging.LogFactory;
9
10 import java.beans.BeanInfo  ;
11 import java.beans.IntrospectionException ;
12 import java.beans.Introspector ;
13 import java.beans.PropertyDescriptor ;
14 import java.util.Collections ;
15 import java.util.Map ;
16 import java.util.Set ;
17 import java.util.TreeSet ;
18
19
25 public class ShowValidatorAction extends ListValidatorsAction {
26 private static Log log = LogFactory.getLog(ShowValidatorAction.class);
27
28 Set properties = Collections.EMPTY_SET;
29 int selected = 0;
30
31 public int getSelected() {
32 return selected;
33 }
34
35 public void setSelected(int selected) {
36 this.selected = selected;
37 }
38
39 public Set getProperties() {
40 return properties;
41 }
42
43 public Validator getSelectedValidator() {
44 return (Validator) validators.get(selected);
45 }
46
47 public String execute() throws Exception {
48 loadValidators();
49 Validator validator = getSelectedValidator();
50 properties = new TreeSet ();
51 try {
52 Map context = Ognl.createDefaultContext(validator);
53 BeanInfo beanInfoFrom = null;
54 try {
55 beanInfoFrom = Introspector.getBeanInfo(validator.getClass(), Object .class);
56 } catch (IntrospectionException e) {
57 log.error("An error occurred", e);
58 addActionError("An error occurred while introspecting a validator of type " + validator.getClass().getName());
59 return ERROR;
60 }
61
62 PropertyDescriptor [] pds = beanInfoFrom.getPropertyDescriptors();
63
64 for (int i = 0; i < pds.length; i++) {
65 PropertyDescriptor pd = pds[i];
66 String name = pd.getName();
67 Object value = null;
68 if (pd.getReadMethod() == null) {
69 value = "No read method for property";
70 } else {
71 try {
72 Object expr = OgnlUtil.compile(name);
73 value = Ognl.getValue(expr, context, validator);
74 } catch (OgnlException e) {
75 addActionError("Caught OGNL exception while getting property value for '" + name + "' on validator of type " + validator.getClass().getName());
76 }
77 }
78 properties.add(new PropertyInfo(name, pd.getPropertyType(), value));
79 }
80 } catch (Exception e) {
81 log.warn("Unable to retrieve properties.", e);
82 addActionError("Unable to retrieve properties: " + e.toString());
83 }
84
85 if (hasErrors())
86 return ERROR;
87 else
88 return SUCCESS;
89 }
90
91 public static class PropertyInfo implements Comparable {
92 private String name;
93 private Class type;
94 private Object value;
95
96 public PropertyInfo(String name, Class type, Object value) {
97 if (name == null) {
98 throw new IllegalArgumentException ("Name must not be null");
99 }
100 if (type == null) {
101 throw new IllegalArgumentException ("Type must not be null");
102 }
103 this.name = name;
104 this.type = type;
105 this.value = value;
106 }
107
108 public Class getType() {
109 return type;
110 }
111
112 public void setType(Class type) {
113 this.type = type;
114 }
115
116 public Object getValue() {
117 return value;
118 }
119
120 public void setValue(Object value) {
121 this.value = value;
122 }
123
124 public String getName() {
125 return name;
126 }
127
128 public void setName(String name) {
129 this.name = name;
130 }
131
132 public boolean equals(Object o) {
133 if (this == o) return true;
134 if (!(o instanceof PropertyInfo)) return false;
135
136 final PropertyInfo propertyInfo = (PropertyInfo) o;
137
138 if (!name.equals(propertyInfo.name)) return false;
139 if (!type.equals(propertyInfo.type)) return false;
140 if (value != null ? !value.equals(propertyInfo.value) : propertyInfo.value != null) return false;
141
142 return true;
143 }
144
145 public int hashCode() {
146 int result;
147 result = name.hashCode();
148 result = 29 * result + type.hashCode();
149 result = 29 * result + (value != null ? value.hashCode() : 0);
150 return result;
151 }
152
153 public int compareTo(Object o) {
154 PropertyInfo other = (PropertyInfo) o;
155 return this.name.compareTo(other.name);
156 }
157 }
158 }
159 |
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