Statistics
| Revision:

svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / expressionevaluator / impl / symboltable / FeatureSymbolTableImpl.java @ 44750

History | View | Annotate | Download (5.64 KB)

1
/**
2
 * gvSIG. Desktop Geographic Information System.
3
 *
4
 * Copyright (C) 2007-2020 gvSIG Association.
5
 *
6
 * This program is free software; you can redistribute it and/or
7
 * modify it under the terms of the GNU General Public License
8
 * as published by the Free Software Foundation; either version 3
9
 * of the License, or (at your option) any later version.
10
 *
11
 * This program is distributed in the hope that it will be useful,
12
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
 * GNU General Public License for more details.
15
 *
16
 * You should have received a copy of the GNU General Public License
17
 * along with this program; if not, write to the Free Software
18
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
19
 * MA  02110-1301, USA.
20
 *
21
 * For any additional information, do not hesitate to contact us
22
 * at info AT gvsig.com, or visit our website www.gvsig.com.
23
 */
24
package org.gvsig.expressionevaluator.impl.symboltable;
25

    
26
import org.gvsig.fmap.dal.expressionevaluator.TableAttributeHandler;
27
import org.apache.commons.lang3.Range;
28
import org.apache.commons.lang3.StringUtils;
29
import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator;
30
import org.gvsig.expressionevaluator.ExpressionEvaluatorManager;
31
import org.gvsig.expressionevaluator.Function;
32
import org.gvsig.expressionevaluator.Interpreter;
33
import org.gvsig.expressionevaluator.MutableSymbolTable;
34
import org.gvsig.expressionevaluator.impl.DALFunctions;
35
import org.gvsig.expressionevaluator.spi.AbstractFunction;
36
import org.gvsig.expressionevaluator.spi.AbstractSymbolTable;
37
import org.gvsig.fmap.dal.DataManager;
38
import static org.gvsig.fmap.dal.DataManager.FUNCTION_CURRENT_ROW;
39
import org.gvsig.fmap.dal.expressionevaluator.FeatureSymbolTable;
40
import org.gvsig.fmap.dal.feature.Feature;
41
import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;
42
import org.gvsig.fmap.dal.feature.FeatureStore;
43
import org.gvsig.fmap.dal.feature.FeatureType;
44

    
45
/**
46
 *
47
 * @author jjdelcerro
48
 */
49
@SuppressWarnings("UseSpecificCatch")
50
public class FeatureSymbolTableImpl extends AbstractSymbolTable implements FeatureSymbolTable {
51
  private static final String DAL_SYMBOL_TABLE_FEATURE = "DAL.SymbolTable.Feature";
52

    
53
  private final Function current_row;
54
  private Feature feature;
55
  private FeatureType type;
56
  private String storeName;
57
  private final TableAttributeHandler storeAttributeHandler;
58

    
59
  @SuppressWarnings("OverridableMethodCallInConstructor")
60
  public FeatureSymbolTableImpl() {
61
    super(DAL_SYMBOL_TABLE_FEATURE);
62
    this.current_row = new AbstractFunction(
63
            DALFunctions.GROUP_DATA_ACCESS,
64
            FUNCTION_CURRENT_ROW,
65
            Range.is(0),
66
            "Return the current row when used in a table filter.\n"
67
            + "Return null if used outer a table filter.",
68
            FUNCTION_CURRENT_ROW + "()",
69
            null,
70
            "Feature"
71
    ) {
72
      @Override
73
      public Object call(Interpreter interpreter, Object[] args) throws Exception {
74
        return feature;
75
      }
76
    };
77
    this.storeAttributeHandler = new TableAttributeHandler() {
78
      @Override
79
      public Object get(String name) {
80
        try {
81
          return feature.get(name);
82
        } catch (Exception ex) {
83
          return feature.getExtraValue(name);
84
        }
85
      }
86

    
87
      @Override
88
      public String getName() {
89
        return storeName;
90
      }
91
    };
92
  }
93

    
94
  @Override
95
  public FeatureSymbolTableImpl clone() throws CloneNotSupportedException {
96
    FeatureSymbolTableImpl other = (FeatureSymbolTableImpl) super.clone();
97
    return other;
98
  }
99

    
100
  @Override
101
  public Function function(String name) {
102
    if (StringUtils.equalsIgnoreCase(name, FUNCTION_CURRENT_ROW)) {
103
      return this.current_row;
104
    }
105
    return super.function(name);
106
  }
107

    
108
  @Override
109
  public boolean exists(String name) {
110
    if (type == null) {
111
      return false;
112
    }
113
    if (type.get(name) != null) {
114
      return true;
115
    }
116
    if (StringUtils.equalsIgnoreCase(name, this.storeName) ||
117
        StringUtils.equalsIgnoreCase(name, SYMBOL_CURRENT_TABLE) ||
118
        StringUtils.equalsIgnoreCase(name, SYMBOL_CURRENT_ROW) ) {
119
      return true;
120
    }
121
    if (feature == null) {
122
      return false;
123
    }
124
    if (this.feature.hasExtraValue(name)) {
125
      return true;
126
    }
127
    return false;
128
  }
129

    
130
  @Override
131
  public Object value(String name) {
132
    if (feature == null) {
133
      return null;
134
    }
135
    if (StringUtils.equalsIgnoreCase(name, this.storeName) ||
136
        StringUtils.equalsIgnoreCase(name, SYMBOL_CURRENT_TABLE)) {
137
      return this.storeAttributeHandler;
138
    }
139
    if (StringUtils.equalsIgnoreCase(name, SYMBOL_CURRENT_ROW)) {
140
      return this.feature;
141
    }
142
    try {
143
      return this.feature.get(name);
144
    } catch (Exception ex) {
145
      return this.feature.getExtraValue(name);
146
    }
147
  }
148

    
149
  @Override
150
  public boolean isSQLCompatible(String name) {
151
    if (this.type == null) {
152
      return super.isSQLCompatible(name);
153
    }
154
    FeatureAttributeDescriptor attrdesc = this.type.getAttributeDescriptor(name);
155
    if (attrdesc == null) {
156
      return true;
157
    }
158
    if (attrdesc.isComputed()) {
159
      return false;
160
    }
161
    return true;
162
  }
163

    
164
  @Override
165
  public void setFeature(Feature feature) {
166
    this.feature = feature;
167
    if (this.type == null) {
168
      this.type = feature.getType();
169
      FeatureStore store = feature.getStore();
170
      if (store != null) {
171
        this.storeName = store.getName();
172
      }
173
    }
174
  }
175

    
176
  @Override
177
  public MutableSymbolTable createParent() {
178
    ExpressionEvaluatorManager expManager = ExpressionEvaluatorLocator.getManager();
179

    
180
    MutableSymbolTable symbolTable = expManager.createSymbolTable();
181
    symbolTable.addSymbolTable(this);
182
    return symbolTable;
183
  }
184

    
185
}