Revision 22280

View differences:

trunk/extensions/extSymbology/src/org/gvsig/symbology/fmap/rendering/filter/operations/FieldExpressionOperator.java
1
/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
2
 *
3
 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
4
 *
5
 * This program is free software; you can redistribute it and/or
6
 * modify it under the terms of the GNU General Public License
7
 * as published by the Free Software Foundation; either version 2
8
 * of the License, or (at your option) any later version.
9
 *
10
 * This program is distributed in the hope that it will be useful,
11
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
 * GNU General Public License for more details.
14
 *
15
 * You should have received a copy of the GNU General Public License
16
 * along with this program; if not, write to the Free Software
17
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.
18
 *
19
 * For more information, contact:
20
 *
21
 *  Generalitat Valenciana
22
 *   Conselleria d'Infraestructures i Transport
23
 *   Av. Blasco Ib??ez, 50
24
 *   46010 VALENCIA
25
 *   SPAIN
26
 *
27
 *      +34 963862235
28
 *   gvsig@gva.es
29
 *      www.gvsig.gva.es
30
 *
31
 *    or
32
 *
33
 *   IVER T.I. S.A
34
 *   Salamanca 50
35
 *   46005 Valencia
36
 *   Spain
37
 *
38
 *   +34 963163400
39
 *   dac@iver.es
40
 */
41
package org.gvsig.symbology.fmap.rendering.filter.operations;
42

  
43
import java.util.ArrayList;
44
import java.util.Hashtable;
45

  
46
import com.hardcode.gdbms.engine.values.Value;
47

  
48
public class FieldExpressionOperator implements Expression {
49

  
50
	private ArrayList<Expression> arguments = new ArrayList<Expression>();
51

  
52
	public void addArgument(int i, Expression arg) {
53
		arguments.add(i, arg);	
54
	}
55

  
56
	public void check(Hashtable<String, Value> symbol_table)
57
	throws ExpressionException {
58
		
59
	}
60

  
61
	public Object evaluate(Hashtable<String, Value> symbol_table)
62
	throws ExpressionException {
63

  
64
		String result = "";
65

  
66
		if(arguments != null) {
67
			
68
			for (int i = arguments.size()-1; i >= 0; i--) {
69
				Expression function = (Expression)arguments.get(i);
70
				result += ((String) (function.evaluate(symbol_table).toString()));
71
			}
72
			return result;
73
		}
74

  
75
		return null;
76
	}
77

  
78
	public ArrayList<Expression> getArguments() {
79
		return arguments;
80
	}
81

  
82
	public String getName() {
83
		return null;
84
	}
85

  
86
	public String getPattern() {
87
		throw new Error ("Not yet implemented");
88
	}
89

  
90
	public void setArguments(ArrayList<Expression> arguments) {
91
		this.arguments = arguments;
92
	}
93

  
94

  
95
}

Also available in: Unified diff