01: /*
02: * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun in the LICENSE file that accompanied this code.
10: *
11: * This code is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * version 2 for more details (a copy is included in the LICENSE file that
15: * accompanied this code).
16: *
17: * You should have received a copy of the GNU General Public License version
18: * 2 along with this work; if not, write to the Free Software Foundation,
19: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25:
26: package com.sun.xml.internal.bind.v2.model.nav;
27:
28: import java.lang.reflect.GenericArrayType;
29: import java.lang.reflect.ParameterizedType;
30: import java.lang.reflect.Type;
31: import java.lang.reflect.TypeVariable;
32: import java.lang.reflect.WildcardType;
33:
34: /**
35: * @author Kohsuke Kawaguchi
36: */
37: abstract class TypeVisitor<T, P> {
38: public final T visit(Type t, P param) {
39: assert t != null;
40:
41: if (t instanceof Class)
42: return onClass((Class) t, param);
43: if (t instanceof ParameterizedType)
44: return onParameterizdType((ParameterizedType) t, param);
45: if (t instanceof GenericArrayType)
46: return onGenericArray((GenericArrayType) t, param);
47: if (t instanceof WildcardType)
48: return onWildcard((WildcardType) t, param);
49: if (t instanceof TypeVariable)
50: return onVariable((TypeVariable) t, param);
51:
52: // covered all the cases
53: assert false;
54: throw new IllegalArgumentException();
55: }
56:
57: protected abstract T onClass(Class c, P param);
58:
59: protected abstract T onParameterizdType(ParameterizedType p, P param);
60:
61: protected abstract T onGenericArray(GenericArrayType g, P param);
62:
63: protected abstract T onVariable(TypeVariable v, P param);
64:
65: protected abstract T onWildcard(WildcardType w, P param);
66: }
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