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1
29
30 package com.caucho.el;
31
32 import javax.el.ELContext;
33 import javax.el.ELException;
34 import java.util.HashMap  ;
35
36
39 abstract public class Marshall {
40 private static final HashMap <Class ,Marshall> ARG_MAP
41 = new HashMap <Class ,Marshall>();
42
43 public static Marshall create(Class arg)
44 {
45 Marshall marshall = ARG_MAP.get(arg);
46
47 if (marshall != null)
48 return marshall;
49 else
50 return OBJECT;
51 }
52
53 abstract public Object marshall(Expr expr, ELContext env)
54 throws ELException;
55
56 public static final Marshall BOOLEAN = new Marshall() {
57 public Object marshall(Expr expr, ELContext env)
58 throws ELException
59 {
60 return new Boolean ((boolean) expr.evalBoolean(env));
61 }
62 };
63
64 public static final Marshall BYTE = new Marshall() {
65 public Object marshall(Expr expr, ELContext env)
66 throws ELException
67 {
68 return new Byte ((byte) expr.evalLong(env));
69 }
70 };
71
72 public static final Marshall SHORT = new Marshall() {
73 public Object marshall(Expr expr, ELContext env)
74 throws ELException
75 {
76 return new Short ((short) expr.evalLong(env));
77 }
78 };
79
80 public static final Marshall INTEGER = new Marshall() {
81 public Object marshall(Expr expr, ELContext env)
82 throws ELException
83 {
84 return new Integer ((int) expr.evalLong(env));
85 }
86 };
87
88 public static final Marshall LONG = new Marshall() {
89 public Object marshall(Expr expr, ELContext env)
90 throws ELException
91 {
92 return new Long (expr.evalLong(env));
93 }
94 };
95
96 public static final Marshall FLOAT = new Marshall() {
97 public Object marshall(Expr expr, ELContext env)
98 throws ELException
99 {
100 return new Float ((float) expr.evalDouble(env));
101 }
102 };
103
104 public static final Marshall DOUBLE = new Marshall() {
105 public Object marshall(Expr expr, ELContext env)
106 throws ELException
107 {
108 return new Double (expr.evalDouble(env));
109 }
110 };
111
112 public static final Marshall STRING = new Marshall() {
113 public Object marshall(Expr expr, ELContext env)
114 throws ELException
115 {
116 return expr.evalString(env);
117 }
118 };
119
120 public static final Marshall CHARACTER = new Marshall() {
121 public Object marshall(Expr expr, ELContext env)
122 throws ELException
123 {
124 String s = expr.evalString(env);
125
126 if (s == null || s.length() == 0)
127 return null;
128 else
129 return new Character (s.charAt(0));
130 }
131 };
132
133 public static final Marshall OBJECT = new Marshall() {
134 public Object marshall(Expr expr, ELContext env)
135 throws ELException
136 {
137 return expr.getValue(env);
138 }
139 };
140
141 static {
142 ARG_MAP.put(boolean.class, BOOLEAN);
143 ARG_MAP.put(Boolean .class, BOOLEAN);
144
145 ARG_MAP.put(byte.class, BYTE);
146 ARG_MAP.put(Byte .class, BYTE);
147
148 ARG_MAP.put(short.class, SHORT);
149 ARG_MAP.put(Short .class, SHORT);
150
151 ARG_MAP.put(int.class, INTEGER);
152 ARG_MAP.put(Integer .class, INTEGER);
153
154 ARG_MAP.put(long.class, LONG);
155 ARG_MAP.put(Long .class, LONG);
156
157 ARG_MAP.put(float.class, FLOAT);
158 ARG_MAP.put(Float .class, FLOAT);
159
160 ARG_MAP.put(double.class, DOUBLE);
161 ARG_MAP.put(Double .class, DOUBLE);
162
163 ARG_MAP.put(char.class, CHARACTER);
164 ARG_MAP.put(Character .class, CHARACTER);
165
166 ARG_MAP.put(String .class, STRING);
167 }
168 }
169 |
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