| 1 | /* |
| 2 | * This file is part of JON. |
| 3 | * |
| 4 | * JON is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU Lesser General Public License as published by |
| 6 | * the Free Software Foundation; either version 3 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * JON is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | * |
| 17 | * Copyright 2007 Michael Doberenz |
| 18 | */ |
| 19 | package org.fuwjax.jon.type; |
| 20 | |
| 21 | import org.fuwjax.jon.ClassCastStrategy; |
| 22 | import org.fuwjax.jon.IndirectType; |
| 23 | import org.fuwjax.jon.ObjectAccessException; |
| 24 | import org.fuwjax.jon.ReferenceStrategy; |
| 25 | import org.fuwjax.jon.accessor.Literal; |
| 26 | import org.fuwjax.jon.accessor.LiteralAccessor; |
| 27 | import org.fuwjax.jon.accessor.Symbol; |
| 28 | |
| 29 | /** |
| 30 | * An abstract layer over the enum classes. |
| 31 | * @author michaeldoberenz |
| 32 | */ |
| 33 | public class EnumType extends AbstractIndirectType implements LiteralAccessor{ |
| 34 | /** |
| 35 | * Wraps <code>cls</code> with an indirect type. |
| 36 | * @param cls the class instance backing this type |
| 37 | */ |
| 38 | public EnumType(final Class<?> cls){ |
| 39 | super(cls); |
| 40 | } |
| 41 | |
| 42 | public ClassCastStrategy getClassCastStrategy(){ |
| 43 | return ClassCastStrategy.AlwaysCast; |
| 44 | } |
| 45 | |
| 46 | public ReferenceStrategy getReferenceStrategy(){ |
| 47 | return ReferenceStrategy.NeverReference; |
| 48 | } |
| 49 | |
| 50 | public Symbol getSymbolSpec(){ |
| 51 | return Symbol.Literal; |
| 52 | } |
| 53 | |
| 54 | public Literal getLiteral(){ |
| 55 | return Literal.Identifier; |
| 56 | } |
| 57 | |
| 58 | public CharSequence toString(final Object object) throws ObjectAccessException{ |
| 59 | return ((Enum<?>)object).name(); |
| 60 | } |
| 61 | |
| 62 | /* SW unchecked for Enum.valueOf */ |
| 63 | @SuppressWarnings("unchecked") |
| 64 | public Object createInstance(final CharSequence parse, final Object source) throws ObjectAccessException{ |
| 65 | return Enum.valueOf((Class<? extends Enum>)getType(), parse.toString()); |
| 66 | } |
| 67 | |
| 68 | @Override |
| 69 | public IndirectType getActualType(final Object object) throws ClassCastException{ |
| 70 | if(getType().isInstance(object)){ |
| 71 | return this; |
| 72 | } |
| 73 | return super.getActualType(object); |
| 74 | } |
| 75 | } |