root / org.gvsig.projection / trunk / src / main / java / org / cresques / coerce / CoerceToString.java @ 84
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| 1 | 84 | jjdelcerro | /* gvSIG. Geographic Information System of the Valencian Government
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| 2 | *
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| 3 | * Copyright (C) 2007-2008 Infrastructures and Transports Department
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| 4 | * of the Valencian Government (CIT)
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| 5 | *
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| 6 | * This program is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU General Public License
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| 8 | * as published by the Free Software Foundation; either version 2
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| 9 | * of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This program is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | * GNU General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU General Public License
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| 17 | * along with this program; if not, write to the Free Software
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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| 19 | * MA 02110-1301, USA.
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| 20 | *
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| 21 | */
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| 22 | package org.cresques.coerce; |
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| 23 | |||
| 24 | import org.cresques.cts.IProjection; |
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| 25 | import org.gvsig.tools.dataTypes.CoercionException; |
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| 26 | import org.gvsig.tools.dataTypes.DataTypesManager.Coercion; |
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| 27 | |||
| 28 | /**
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| 29 | * Convert a Projection to String.
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| 30 | *
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| 31 | * Support convert:
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| 32 | * - Projection to String (do nothing)
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| 33 | *
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| 34 | * @author gvSIG Team
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| 35 | * @version $Id$
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| 36 | *
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| 37 | */
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| 38 | public class CoerceToString implements Coercion { |
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| 39 | |||
| 40 | Coercion previous = null;
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| 41 | |||
| 42 | public CoerceToString() {
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| 43 | // Do nothing
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| 44 | } |
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| 45 | |||
| 46 | public CoerceToString(Coercion previous) {
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| 47 | this.previous = previous;
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| 48 | } |
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| 49 | |||
| 50 | |||
| 51 | public Object coerce(Object value) throws CoercionException { |
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| 52 | try {
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| 53 | if( value == null || value instanceof String ) { |
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| 54 | return value;
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| 55 | } |
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| 56 | if( value instanceof IProjection ) { |
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| 57 | return ((IProjection)value).getFullCode();
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| 58 | } |
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| 59 | if( previous != null ) { |
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| 60 | return previous.coerce(value);
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| 61 | } |
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| 62 | } catch (Exception e) { |
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| 63 | throw new CoercionException(e); |
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| 64 | } |
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| 65 | throw new CoercionException(); |
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| 66 | } |
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| 67 | |||
| 68 | } |