geotools/labelsearch/LabelSearch.java

/*******************************************************************************
 * Copyright (c) 2009 Martin O. J. Schmitz.
 * 
 * This file is part of the SCHMITZM library - a collection of utility 
 * classes based on Java 1.6, focusing (not only) on Java Swing 
 * and the Geotools library.
 * 
 * The SCHMITZM project is hosted at:
 * http://wald.intevation.org/projects/schmitzm/
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License (license.txt)
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * or try this link: http://www.gnu.org/licenses/lgpl.html
 * 
 * Contributors:
 *     Martin O. J. Schmitz - initial API and implementation
 *     Stefan A. Tzeggai - additional utility classes
 ******************************************************************************/
package skrueger.geotools.labelsearch;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.apache.log4j.Logger;
import org.geotools.data.DefaultQuery;
import org.geotools.data.FeatureSource;
import org.geotools.feature.FeatureCollection;
import org.geotools.filter.text.cql2.CQL;
import org.geotools.filter.text.cql2.CQLException;
import org.geotools.map.MapLayer;
import org.geotools.styling.Style;
import org.geotools.styling.TextSymbolizer;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.filter.Filter;
import org.opengis.filter.expression.PropertyName;

import schmitzm.geotools.feature.FeatureUtil;
import schmitzm.geotools.gui.GeotoolsGUIUtil;
import schmitzm.geotools.styling.StylingUtil;
import schmitzm.lang.LangUtil;

/**
 * This class allows to search for a {@link String} in a map. The algorithm will
 * analyze the {@link Style} of every visible(?) layer and determine the label
 * attribute. This field is then searched for every feature.
 * 
 * @author Stefan A. Tzeggai
 * 
 */
public class LabelSearch {
        final static private Logger LOGGER = Logger.getLogger(LabelSearch.class);

        public static String R(String key, Object... values) {
                return GeotoolsGUIUtil.R(key, values);
        }

        protected final schmitzm.geotools.gui.SelectableXMapPane mapPane;

        public LabelSearch(final schmitzm.geotools.gui.SelectableXMapPane mapPane) {
                this.mapPane = mapPane;
        }

        public List<SearchResult> search(final String string) {

                final String searchMe = string.toUpperCase();

                final ArrayList<SearchResult> hits = new ArrayList<SearchResult>();

                for (final MapLayer ml : mapPane.getMapContext().getLayers()) {
                        try {

                                // System.out.println("layer = "+ml.getTitle());

                                if (!ml.isVisible())
                                        continue;

                                final List<TextSymbolizer> allTS = StylingUtil
                                                .getVisibleTextSymbolizers(ml.getStyle());
                                if (allTS.size() == 0) {
                                        // A layer without any TextSymbolizer doesn't have to be
                                        // searched any more.
                                        continue;
                                }

                                // We only deal with one TextSymbolizer so far:
                                TextSymbolizer ts = allTS.get(0);

                                final FeatureSource<SimpleFeatureType, SimpleFeature> featureSource = (FeatureSource<SimpleFeatureType, SimpleFeature>) ml
                                                .getFeatureSource();

                                SimpleFeatureType schema = featureSource.getSchema();

                                final String typeName = schema.getName().getLocalPart();

                                PropertyName prop1 = StylingUtil.getFirstPropertyName(schema,
                                                ts);
                                PropertyName prop2 = StylingUtil.getSecondPropertyName(schema,
                                                ts);

                                if (StylingUtil.getFirstPropertyName(schema, ts) == null) {
                                        // At least one property field we need
                                        continue;
                                }

                                Filter searchFilter;
                                String[] properties = new String[] { schema.getGeometryDescriptor().getLocalName(), prop1.getPropertyName() };
                                // Only one property used...

                                searchFilter = CQL.toFilter("strToUpperCase "
                                                + prop1.getPropertyName() + " LIKE '%" + searchMe
                                                + "%'");

                                if (prop2 != null) {
                                        Filter searchFilter2 = CQL.toFilter("strToUpperCase "
                                                        + prop2.getPropertyName() + " LIKE '%" + searchMe
                                                        + "%'");

                                        searchFilter = FeatureUtil.FILTER_FACTORY2.or(searchFilter,
                                                        searchFilter2);

                                        properties = LangUtil.extendArray(properties, prop2
                                                        .getPropertyName());
                                }

                                // Add the layer's filter if it exists
                                Filter layerFilter = ml.getQuery().getFilter();
                                if (layerFilter != null && layerFilter != Filter.INCLUDE) {
                                        searchFilter = FeatureUtil.FILTER_FACTORY2.and(layerFilter,
                                                        searchFilter);
                                }
                                
//                              LOGGER.info("Searching for "+searchFilter.toString());

                                FeatureCollection<SimpleFeatureType, SimpleFeature> features = (FeatureCollection<SimpleFeatureType, SimpleFeature>) ml
                                                .getFeatureSource().getFeatures(
                                                                new DefaultQuery(typeName, searchFilter,
                                                                                properties));

                                final Iterator<SimpleFeature> fi = features.iterator();
                                try {
                                        while (fi.hasNext()) {
                                                final SimpleFeature f = fi.next();

                                                String valueString = "";
                                                valueString = f.getAttribute(prop1.getPropertyName())
                                                                .toString();

                                                if (prop2 != null) {
                                                        String valueString2 = f.getAttribute(
                                                                        prop2.getPropertyName()).toString();

                                                        if (valueString2 != null && !valueString2.isEmpty())
                                                                valueString += ", " + valueString2;
                                                }

                                                hits.add(createSearchResult(f, valueString, ml
                                                                .getTitle(), ml));
                                        }
                                } finally {
                                        features.close(fi);
                                }
                        } catch (final IOException e) {
                                // Searching this layer failed
                                LOGGER.error("",e);
                        } catch (CQLException e) {
                                LOGGER.error("",e);
                        }
                } // next layer

                // Hits from the top-most layer should appear first.
                Collections.reverse(hits);

                return hits;
        }

        protected SearchResult createSearchResult(final SimpleFeature f,
                        final String title, final String inTitle, MapLayer ml) {
                return new SearchResultFeature(f, title, inTitle, mapPane, ml);
        }

}
1	/*******************************************************************************
2	* Copyright (c) 2009 Martin O. J. Schmitz.
3	*
4	* This file is part of the SCHMITZM library - a collection of utility
5	* classes based on Java 1.6, focusing (not only) on Java Swing
6	* and the Geotools library.
7	*
8	* The SCHMITZM project is hosted at:
9	* http://wald.intevation.org/projects/schmitzm/
10	*
11	* This program is free software; you can redistribute it and/or
12	* modify it under the terms of the GNU Lesser General Public License
13	* as published by the Free Software Foundation; either version 3
14	* of the License, or (at your option) any later version.
15	*
16	* This program is distributed in the hope that it will be useful,
17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19	* GNU General Public License for more details.
20	*
21	* You should have received a copy of the GNU Lesser General Public License (license.txt)
22	* along with this program; if not, write to the Free Software
23	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24	* or try this link: http://www.gnu.org/licenses/lgpl.html
25	*
26	* Contributors:
27	* Martin O. J. Schmitz - initial API and implementation
28	* Stefan A. Tzeggai - additional utility classes
29	******************************************************************************/
30	package skrueger.geotools.labelsearch;
31
32	import java.io.IOException;
33	import java.util.ArrayList;
34	import java.util.Collections;
35	import java.util.Iterator;
36	import java.util.List;
37
38	import org.apache.log4j.Logger;
39	import org.geotools.data.DefaultQuery;
40	import org.geotools.data.FeatureSource;
41	import org.geotools.feature.FeatureCollection;
42	import org.geotools.filter.text.cql2.CQL;
43	import org.geotools.filter.text.cql2.CQLException;
44	import org.geotools.map.MapLayer;
45	import org.geotools.styling.Style;
46	import org.geotools.styling.TextSymbolizer;
47	import org.opengis.feature.simple.SimpleFeature;
48	import org.opengis.feature.simple.SimpleFeatureType;
49	import org.opengis.filter.Filter;
50	import org.opengis.filter.expression.PropertyName;
51
52	import schmitzm.geotools.feature.FeatureUtil;
53	import schmitzm.geotools.gui.GeotoolsGUIUtil;
54	import schmitzm.geotools.styling.StylingUtil;
55	import schmitzm.lang.LangUtil;
56
57	/**
58	* This class allows to search for a {@link String} in a map. The algorithm will
59	* analyze the {@link Style} of every visible(?) layer and determine the label
60	* attribute. This field is then searched for every feature.
61	*
62	* @author Stefan A. Tzeggai
63	*
64	*/
65	public class LabelSearch {
66	final static private Logger LOGGER = Logger.getLogger(LabelSearch.class);
67
68	public static String R(String key, Object... values) {
69	return GeotoolsGUIUtil.R(key, values);
70	}
71
72	protected final schmitzm.geotools.gui.SelectableXMapPane mapPane;
73
74	public LabelSearch(final schmitzm.geotools.gui.SelectableXMapPane mapPane) {
75	this.mapPane = mapPane;
76	}
77
78	public List<SearchResult> search(final String string) {
79
80	final String searchMe = string.toUpperCase();
81
82	final ArrayList<SearchResult> hits = new ArrayList<SearchResult>();
83
84	for (final MapLayer ml : mapPane.getMapContext().getLayers()) {
85	try {
86
87	// System.out.println("layer = "+ml.getTitle());
88
89	if (!ml.isVisible())
90	continue;
91
92	final List<TextSymbolizer> allTS = StylingUtil
93	.getVisibleTextSymbolizers(ml.getStyle());
94	if (allTS.size() == 0) {
95	// A layer without any TextSymbolizer doesn't have to be
96	// searched any more.
97	continue;
98	}
99
100	// We only deal with one TextSymbolizer so far:
101	TextSymbolizer ts = allTS.get(0);
102
103	final FeatureSource<SimpleFeatureType, SimpleFeature> featureSource = (FeatureSource<SimpleFeatureType, SimpleFeature>) ml
104	.getFeatureSource();
105
106	SimpleFeatureType schema = featureSource.getSchema();
107
108	final String typeName = schema.getName().getLocalPart();
109
110	PropertyName prop1 = StylingUtil.getFirstPropertyName(schema,
111	ts);
112	PropertyName prop2 = StylingUtil.getSecondPropertyName(schema,
113	ts);
114
115	if (StylingUtil.getFirstPropertyName(schema, ts) == null) {
116	// At least one property field we need
117	continue;
118	}
119
120	Filter searchFilter;
121	String[] properties = new String[] { schema.getGeometryDescriptor().getLocalName(), prop1.getPropertyName() };
122	// Only one property used...
123
124	searchFilter = CQL.toFilter("strToUpperCase "
125	+ prop1.getPropertyName() + " LIKE '%" + searchMe
126	+ "%'");
127
128	if (prop2 != null) {
129	Filter searchFilter2 = CQL.toFilter("strToUpperCase "
130	+ prop2.getPropertyName() + " LIKE '%" + searchMe
131	+ "%'");
132
133	searchFilter = FeatureUtil.FILTER_FACTORY2.or(searchFilter,
134	searchFilter2);
135
136	properties = LangUtil.extendArray(properties, prop2
137	.getPropertyName());
138	}
139
140	// Add the layer's filter if it exists
141	Filter layerFilter = ml.getQuery().getFilter();
142	if (layerFilter != null && layerFilter != Filter.INCLUDE) {
143	searchFilter = FeatureUtil.FILTER_FACTORY2.and(layerFilter,
144	searchFilter);
145	}
146
147	// LOGGER.info("Searching for "+searchFilter.toString());
148
149	FeatureCollection<SimpleFeatureType, SimpleFeature> features = (FeatureCollection<SimpleFeatureType, SimpleFeature>) ml
150	.getFeatureSource().getFeatures(
151	new DefaultQuery(typeName, searchFilter,
152	properties));
153
154	final Iterator<SimpleFeature> fi = features.iterator();
155	try {
156	while (fi.hasNext()) {
157	final SimpleFeature f = fi.next();
158
159	String valueString = "";
160	valueString = f.getAttribute(prop1.getPropertyName())
161	.toString();
162
163	if (prop2 != null) {
164	String valueString2 = f.getAttribute(
165	prop2.getPropertyName()).toString();
166
167	if (valueString2 != null && !valueString2.isEmpty())
168	valueString += ", " + valueString2;
169	}
170
171	hits.add(createSearchResult(f, valueString, ml
172	.getTitle(), ml));
173	}
174	} finally {
175	features.close(fi);
176	}
177	} catch (final IOException e) {
178	// Searching this layer failed
179	LOGGER.error("",e);
180	} catch (CQLException e) {
181	LOGGER.error("",e);
182	}
183	} // next layer
184
185	// Hits from the top-most layer should appear first.
186	Collections.reverse(hits);
187
188	return hits;
189	}
190
191	protected SearchResult createSearchResult(final SimpleFeature f,
192	final String title, final String inTitle, MapLayer ml) {
193	return new SearchResultFeature(f, title, inTitle, mapPane, ml);
194	}
195
196	}
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