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1
46 package org.codehaus.groovy.classgen;
47
48 import java.lang.reflect.Method  ;
49
50 import org.objectweb.asm.CodeVisitor;
51 import org.objectweb.asm.Constants;
52 import org.objectweb.asm.Type;
53
54
60 public class MethodCaller implements Constants {
61
62 private int opcode;
63 private String internalName;
64 private String name;
65 private Class theClass;
66 private String methodDescriptor;
67
68 public static MethodCaller newStatic(Class theClass, String name) {
69 return new MethodCaller(INVOKESTATIC, theClass, name);
70 }
71
72 public static MethodCaller newInterface(Class theClass, String name) {
73 return new MethodCaller(INVOKEINTERFACE, theClass, name);
74 }
75
76 public static MethodCaller newVirtual(Class theClass, String name) {
77 return new MethodCaller(INVOKEVIRTUAL, theClass, name);
78 }
79
80 public MethodCaller(int opcode, Class theClass, String name) {
81 this.opcode = opcode;
82 this.internalName = Type.getInternalName(theClass);
83 this.theClass = theClass;
84 this.name = name;
85
86 }
87
88 public void call(CodeVisitor codeVisitor) {
89 codeVisitor.visitMethodInsn(opcode, internalName, name, getMethodDescriptor());
90 }
91
92 public String getMethodDescriptor() {
93 if (methodDescriptor == null) {
94 Method method = getMethod();
95 methodDescriptor = Type.getMethodDescriptor(method);
96 }
97 return methodDescriptor;
98 }
99
100 protected Method getMethod() {
101 Method [] methods = theClass.getMethods();
102 for (int i = 0; i < methods.length; i++) {
103 Method method = methods[i];
104 if (method.getName().equals(name)) {
105 return method;
106 }
107 }
108 throw new ClassGeneratorException("Could not find method: " + name + " on class: " + theClass);
109 }
110 }
111 |
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