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 | } |