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1
14
15 package com.sun.facelets.el;
16
17 import java.io.Externalizable  ;
18 import java.io.IOException ;
19 import java.io.ObjectInput ;
20 import java.io.ObjectOutput ;
21 import java.lang.reflect.Method ;
22 import java.util.HashMap ;
23 import java.util.Iterator ;
24 import java.util.Map ;
25
26 import javax.el.FunctionMapper;
27
28 import com.sun.el.util.ReflectionUtil;
29
30
39 public final class DefaultFunctionMapper extends FunctionMapper implements
40 Externalizable {
41
42 private static final long serialVersionUID = 1L;
43
44 private Map functions = null;
45
46
52 public Method resolveFunction(String prefix, String localName) {
53 if (this.functions != null) {
54 Function f = (Function) this.functions.get(prefix + ":" + localName);
55 return f.getMethod();
56 }
57 return null;
58 }
59
60 public void addFunction(String prefix, String localName, Method m) {
61 if (this.functions == null) {
62 this.functions = new HashMap ();
63 }
64 Function f = new Function(prefix, localName, m);
65 synchronized (this) {
66 this.functions.put(prefix+":"+localName, f);
67 }
68 }
69
70
75 public void writeExternal(ObjectOutput out) throws IOException {
76 out.writeObject(this.functions);
77 }
78
79
84 public void readExternal(ObjectInput in) throws IOException ,
85 ClassNotFoundException {
86 this.functions = (Map ) in.readObject();
87 }
88
89 public String toString() {
90 StringBuffer sb = new StringBuffer (128);
91 sb.append("FunctionMapper[\n");
92 for (Iterator itr = this.functions.values().iterator(); itr.hasNext(); ) {
93 sb.append(itr.next()).append('\n');
94 }
95 sb.append(']');
96 return sb.toString();
97 }
98
99 private static class Function implements Externalizable {
100
101 private static final long serialVersionUID = 1L;
102
103 protected transient Method m;
104 protected String owner;
105 protected String name;
106 protected String [] types;
107 protected String prefix;
108 protected String localName;
109
110
113 public Function(String prefix, String localName, Method m) {
114 if (localName == null) {
115 throw new NullPointerException ("LocalName cannot be null");
116 }
117 if (m == null) {
118 throw new NullPointerException ("Method cannot be null");
119 }
120 this.prefix = prefix;
121 this.localName = localName;
122 this.m = m;
123 }
124
125 public Function() {
126 }
128
129
134 public void writeExternal(ObjectOutput out) throws IOException {
135 out.writeUTF((this.prefix != null) ? this.prefix : "");
136 out.writeUTF(this.localName);
137 out.writeUTF(this.m.getDeclaringClass().getName());
138 out.writeUTF(this.m.getName());
139 out.writeObject(ReflectionUtil.toTypeNameArray(this.m.getParameterTypes()));
140 }
141
142
147 public void readExternal(ObjectInput in) throws IOException ,
148 ClassNotFoundException {
149
150 this.prefix = in.readUTF();
151 if ("".equals(this.prefix)) this.prefix = null;
152 this.localName = in.readUTF();
153 this.owner = in.readUTF();
154 this.name = in.readUTF();
155 this.types = (String []) in.readObject();
156 }
157
158 public Method getMethod() {
159 if (this.m == null) {
160 try {
161 Class t = Class.forName(this.owner);
162 Class [] p = ReflectionUtil.toTypeArray(this.types);
163 this.m = t.getMethod(this.name, p);
164 } catch (Exception e) {
165 e.printStackTrace();
166 }
167 }
168 return this.m;
169 }
170
171 public boolean matches(String prefix, String localName) {
172 if (this.prefix != null) {
173 if (prefix == null) return false;
174 if (!this.prefix.equals(prefix)) return false;
175 }
176 return this.localName.equals(localName);
177 }
178
179
182 public boolean equals(Object obj) {
183 if (obj instanceof Function) {
184 return this.hashCode() == obj.hashCode();
185 }
186 return false;
187 }
188
189
192 public int hashCode() {
193 return (this.prefix + this.localName).hashCode();
194 }
195
196 public String toString() {
197 StringBuffer sb = new StringBuffer (32);
198 sb.append("Function[");
199 if (this.prefix != null) {
200 sb.append(this.prefix).append(':');
201 }
202 sb.append(this.name).append("] ");
203 sb.append(this.m);
204 return sb.toString();
205 }
206 }
207 }
208 |
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