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1
28
29 package com.caucho.es.parser;
30
31 import com.caucho.es.ESBase;
32 import com.caucho.es.ESException;
33
34 import java.io.IOException  ;
35 import java.lang.reflect.Constructor ;
36 import java.lang.reflect.Modifier ;
37
38
42 class JavaNewExpr extends CallExpr {
43 private Class javaClass;
44
45 private Constructor constructor;
46
47 JavaNewExpr(Block block, Class javaClass)
48 throws ESException
49 {
50 super(block, null, null, true);
51
52 this.javaClass = javaClass;
53 }
54
55
58 void addCallParam(Expr param)
59 {
60 param.setUsed();
61 args.add(param);
62 }
63
64 int getType()
65 {
66 calculateType();
67
68 return type;
69 }
70
71 Expr getTypeExpr()
72 {
73 calculateType();
74
75 return typeExpr;
76 }
77
78 private void calculateType()
79 {
80 if (isCalculated)
81 return;
82
83 isCalculated = true;
84
85 if (javaClass == null)
86 return;
87
88 method = JavaMethod.bestMethod(javaClass, "create", true, args);
89 if (method == null ||
90 ! method.getReturnType().equals(javaClass))
91 method = null;
92
93 if (method != null)
94 term = new JavaClassExpr(block, javaClass);
95
96 Constructor []constructors = javaClass.getConstructors();
97 Constructor bestConstructor = null;
98 int bestCost = Integer.MAX_VALUE;
99
100 for (int i = 0; i < constructors.length; i++) {
101 Constructor constructor = constructors[i];
102
103 if (! Modifier.isPublic(constructor.getModifiers()))
104 continue;
105
106 Class []param = constructor.getParameterTypes();
107
108 int cost = JavaMethod.methodCost(param, args);
109
110 if (cost < bestCost) {
111 bestCost = cost;
112 bestConstructor = constructor;
113 }
114 }
115
116 this.constructor = bestConstructor;
117
118 type = TYPE_JAVA;
119 typeExpr = new JavaTypeExpr(block, javaClass);
120 }
121
122 void printJavaImpl()
123 throws IOException
124 {
125 if (method != null) {
126 super.printJavaImpl();
127 return;
128 }
129
130 if (constructor == null)
131 throw new IOException ("can't create `" + javaClass.getName() + "'");
132
133 cl.print("new ");
134
135 cl.print(javaClass.getName());
136 cl.print("(");
137
138 Class []params = null;
139 if (constructor != null)
140 params = constructor.getParameterTypes();
141
142 for (int i = 0; i < params.length; i++) {
143 Expr expr;
144
145 if (i < args.size())
146 expr = (Expr) args.get(i);
147 else
148 expr = block.newLiteral(ESBase.esUndefined);
149
150 if (i != 0)
151 cl.print(", ");
152
153 if (params != null && ! params[i].isPrimitive()) {
154 cl.print("(");
155 printJavaClass(params[i]);
156 cl.print(")");
157 }
158
159 expr.printJava();
160 }
161 cl.print(")");
162 }
163 }
164 |
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