/** get the n-th constant from the constant pool */
public Object getConstant(int n, Environment env) {
int constant_type = getConstantType(n);
switch (constant_type) {
case CONSTANT_INTEGER:
case CONSTANT_FLOAT:
case CONSTANT_LONG:
case CONSTANT_DOUBLE:
return getValue(n);
case CONSTANT_CLASS:
return getDeclaration(env, n);
case CONSTANT_STRING:
return getString(getInteger(n));
case CONSTANT_FIELD:
case CONSTANT_METHOD:
case CONSTANT_INTERFACEMETHOD:
try {
int key = getInteger(n);
ClassDefinition clazz = getDeclaration(env, key >> 16).getClassDefinition(env);
int name_and_type = getInteger(key & 0xFFFF);
Identifier id = getIdentifier(name_and_type >> 16);
Type type = getType(name_and_type & 0xFFFF);
for (MemberDefinition field = clazz.getFirstMatch(id);
field != null;
field = field.getNextMatch()) {
Type field_type = field.getType();
if ((constant_type == CONSTANT_FIELD)
? (field_type == type)
: (field_type.equalArguments(type))) return field;
}
} catch (ClassNotFound e) {
}
return null;
default:
throw new ClassFormatError("invalid constant type: " + constant_type);
}
}
