package org.codehaus.groovy.antlr;
import org.codehaus.groovy.ast.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.FieldNode;
import org.codehaus.groovy.ast.GenericsType;
import org.codehaus.groovy.ast.InnerClassNode;
import org.codehaus.groovy.ast.MixinNode;
import org.codehaus.groovy.ast.expr.Expression;
import org.codehaus.groovy.ast.expr.ListExpression;
import org.objectweb.asm.Opcodes;
public class EnumHelper {
private static final int FS = Opcodes.ACC_FINAL | Opcodes.ACC_STATIC;
private static final int PUBLIC_FS = Opcodes.ACC_PUBLIC | FS;
public static ClassNode makeEnumNode(String name, int modifiers, ClassNode[] interfaces, ClassNode outerClass) {
modifiers = modifiers | Opcodes.ACC_FINAL | Opcodes.ACC_ENUM;
ClassNode enumClass;
if (outerClass==null) {
enumClass = new ClassNode(name,modifiers,null,interfaces,MixinNode.EMPTY_ARRAY);
} else {
name = outerClass.getName() + "$" + name;
enumClass = new InnerClassNode(outerClass,name,modifiers,null,interfaces,MixinNode.EMPTY_ARRAY);
}
// set super class and generics info
// "enum X" -> class X extends Enum<X>
GenericsType gt = new GenericsType(enumClass);
ClassNode superClass = ClassHelper.makeWithoutCaching("java.lang.Enum");
superClass.setGenericsTypes(new GenericsType[]{gt});
enumClass.setSuperClass(superClass);
superClass.setRedirect(ClassHelper.Enum_Type);
return enumClass;
}
public static void addEnumConstant(ClassNode enumClass, String name, Expression init) {
int modifiers = PUBLIC_FS | Opcodes.ACC_ENUM;
if (init!=null && !(init instanceof ListExpression)) {
ListExpression list = new ListExpression();
list.addExpression(init);
init = list;
}
FieldNode fn = new FieldNode(name,modifiers,enumClass,enumClass,init);
enumClass.addField(fn);
}
}