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. Krüger - 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 java.util.Locale;

import org.apache.log4j.Logger;
import org.geotools.data.DefaultQuery;
import org.geotools.feature.AttributeType;
import org.geotools.feature.FeatureCollection;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.geotools.map.MapLayer;
import org.geotools.styling.Style;
import org.geotools.styling.TextSymbolizer;
import org.opengis.filter.Filter;
import org.opengis.filter.expression.Expression;
import org.opengis.filter.expression.PropertyName;

import schmitzm.geotools.styling.StylingUtil;
import schmitzm.lang.LangUtil;
import schmitzm.lang.ResourceProvider;

/**
 * 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. Krüger
 * 
 */
public class LabelSearch {
        final static private Logger LOGGER = Logger.getLogger(LabelSearch.class);
        
        public static ResourceProvider RESOURCE = new ResourceProvider(LangUtil
        .extendPackagePath(LabelSearch.class,
                        "labelsearch"), Locale.ENGLISH);
        
        
                        
                        
        public static String R(String key, Object... values) {
                return RESOURCE.getString(key, values);
        }

        protected final schmitzm.geotools.gui.JMapPane mapPane;

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

        private AttributeType getLabelAttribute(final TextSymbolizer ts,
                        final SimpleFeatureType schema) {
                if (ts == null) {
                        // This layer has no labels
                        return null;
                }
                final Expression labelExp = ts.getLabel();
                if (labelExp instanceof PropertyName) {
                        final PropertyName pn = (PropertyName) labelExp;
                        final String propertyName = pn.getPropertyName();
                        return schema.getAttributeType(propertyName);
                } else {
                        // When does this happen
                }

                return null;
        }

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

                final String searchMe = string.toLowerCase();

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

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

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

                                if (!ml.isVisible())
                                        continue;

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

                                final String typeName = ml.getFeatureSource().getSchema()
                                                .getTypeName();

                                // Expression labelExp = ts.getLabel();
                                // ff.like(labelExp, "*"+searchMe+"*");
                                // FeatureCollection features =
                                // ml.getFeatureSource().getFeatures(
                                // new DefaultQuery(typeName, ff.like(labelExp,
                                // "*"+searchMe+"*"), properties));

                                final FeatureCollection features = ml.getFeatureSource().getFeatures(
                                                new DefaultQuery(typeName, Filter.INCLUDE));

                                // new MemoryDataStore().getFeatureSource(typeName)

                                /**
                                 * We do the comparison NOT with a ff.like, because that doesn't
                                 * support case insensitivity and i don't find a lower or UPPER
                                 * function.
                                 */
                                final Iterator<SimpleFeature> fi = features.iterator();
                                while (fi.hasNext()) {
                                        final SimpleFeature f = fi.next();

                                        final TextSymbolizer ts = StylingUtil.getTextSymbolizer(ml
                                                        .getStyle(), f);
                                        if (ts == null)
                                                continue;

                                        final AttributeType labelAttribute = getLabelAttribute(ts, ml
                                                        .getFeatureSource().getSchema());

                                        if (labelAttribute == null) {
                                                continue;
                                        }

                                        // System.out.println("labelAttrib local name" +
                                        // labelAttribute.getLocalName());

                                        final Object value = f
                                                        .getAttribute(labelAttribute.getLocalName());

                                        // System.out.println("labelAttrib value " + value);

                                        if (value == null) {
                                                LOGGER.info("Skipping f: getLocalName() is null for feature="+f);
                                                continue;
                                        }

                                        /**
                                         * LabelString ist z.B. "IMPETUS pluviograph". Suchwort
                                         * "plu" soll treffen. Also wird nach spaces zerlegt und
                                         * dann gesucht
                                         */
                                        final String labelString = value.toString().toLowerCase();
                                        if (labelString.startsWith(searchMe)) {
                                                hits.add(createSearchResult(f, value.toString(), ml
                                                                .getTitle(),ml));
                                        } else {
                                                final String[] parts = labelString.trim().split(" ");
                                                for (final String part : parts) {
                                                        if (part.startsWith(searchMe)) {
                                                                hits.add(createSearchResult(f, value.toString(), ml
                                                                                .getTitle(), ml));
                                                                break;
                                                        }
                                                }
                                        }

                                }

                        } catch (final IOException e) {
                                // Searching this layer failed
                                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	alfonx	244	/*******************************************************************************
2			* Copyright (c) 2009 Martin O. J. Schmitz.
3			*
4			* This file is part of the SCHMITZM library - a collection of utility
5	alfonx	256	* classes based on Java 1.6, focusing (not only) on Java Swing
6	alfonx	244	* 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. Krüger - additional utility classes
29			******************************************************************************/
30	alfonx	139	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			import java.util.Locale;
38
39			import org.apache.log4j.Logger;
40			import org.geotools.data.DefaultQuery;
41			import org.geotools.feature.AttributeType;
42			import org.geotools.feature.FeatureCollection;
43	alfonx	322	import org.opengis.feature.simple.SimpleFeature;
44			import org.opengis.feature.simple.SimpleFeatureType;
45	alfonx	139	import org.geotools.map.MapLayer;
46			import org.geotools.styling.Style;
47			import org.geotools.styling.TextSymbolizer;
48			import org.opengis.filter.Filter;
49			import org.opengis.filter.expression.Expression;
50			import org.opengis.filter.expression.PropertyName;
51
52			import schmitzm.geotools.styling.StylingUtil;
53			import schmitzm.lang.LangUtil;
54			import schmitzm.lang.ResourceProvider;
55
56			/**
57			* This class allows to search for a {@link String} in a map. The algorithm will
58			* analyze the {@link Style} of every visible(?) layer and determine the label
59			* attribute. This field is then searched for every feature.
60			*
61			* @author Stefan A. Krüger
62			*
63			*/
64			public class LabelSearch {
65			final static private Logger LOGGER = Logger.getLogger(LabelSearch.class);
66
67			public static ResourceProvider RESOURCE = new ResourceProvider(LangUtil
68			.extendPackagePath(LabelSearch.class,
69			"labelsearch"), Locale.ENGLISH);
70
71
72
73
74			public static String R(String key, Object... values) {
75			return RESOURCE.getString(key, values);
76			}
77
78			protected final schmitzm.geotools.gui.JMapPane mapPane;
79
80			public LabelSearch(final schmitzm.geotools.gui.JMapPane mapPane) {
81			this.mapPane = mapPane;
82			}
83
84			private AttributeType getLabelAttribute(final TextSymbolizer ts,
85	alfonx	318	final SimpleFeatureType schema) {
86	alfonx	139	if (ts == null) {
87			// This layer has no labels
88			return null;
89			}
90			final Expression labelExp = ts.getLabel();
91			if (labelExp instanceof PropertyName) {
92			final PropertyName pn = (PropertyName) labelExp;
93			final String propertyName = pn.getPropertyName();
94			return schema.getAttributeType(propertyName);
95			} else {
96			// When does this happen
97			}
98
99			return null;
100			}
101
102			public List<SearchResult> search(final String string) {
103
104			final String searchMe = string.toLowerCase();
105
106			final ArrayList<SearchResult> hits = new ArrayList<SearchResult>();
107
108			for (final MapLayer ml : mapPane.getContext().getLayers()) {
109			try {
110
111			// System.out.println("layer = "+ml.getTitle());
112
113			if (!ml.isVisible())
114			continue;
115
116			final List<TextSymbolizer> allTS = StylingUtil.getTextSymbolizers(ml
117			.getStyle());
118			if (allTS.size() == 0) {
119			// A layer without any TextSymbolizer doesn't have to be
120			// searched any more.
121			continue;
122			}
123
124			final String typeName = ml.getFeatureSource().getSchema()
125			.getTypeName();
126
127			// Expression labelExp = ts.getLabel();
128			// ff.like(labelExp, ""+searchMe+"");
129			// FeatureCollection features =
130			// ml.getFeatureSource().getFeatures(
131			// new DefaultQuery(typeName, ff.like(labelExp,
132			// ""+searchMe+""), properties));
133
134			final FeatureCollection features = ml.getFeatureSource().getFeatures(
135			new DefaultQuery(typeName, Filter.INCLUDE));
136
137			// new MemoryDataStore().getFeatureSource(typeName)
138
139			/**
140			* We do the comparison NOT with a ff.like, because that doesn't
141			* support case insensitivity and i don't find a lower or UPPER
142			* function.
143			*/
144	alfonx	318	final Iterator<SimpleFeature> fi = features.iterator();
145	alfonx	139	while (fi.hasNext()) {
146	alfonx	318	final SimpleFeature f = fi.next();
147	alfonx	139
148			final TextSymbolizer ts = StylingUtil.getTextSymbolizer(ml
149			.getStyle(), f);
150			if (ts == null)
151			continue;
152
153			final AttributeType labelAttribute = getLabelAttribute(ts, ml
154			.getFeatureSource().getSchema());
155
156			if (labelAttribute == null) {
157			continue;
158			}
159
160			// System.out.println("labelAttrib local name" +
161			// labelAttribute.getLocalName());
162
163			final Object value = f
164			.getAttribute(labelAttribute.getLocalName());
165
166			// System.out.println("labelAttrib value " + value);
167
168			if (value == null) {
169			LOGGER.info("Skipping f: getLocalName() is null for feature="+f);
170			continue;
171			}
172
173			/**
174			* LabelString ist z.B. "IMPETUS pluviograph". Suchwort
175			* "plu" soll treffen. Also wird nach spaces zerlegt und
176			* dann gesucht
177			*/
178			final String labelString = value.toString().toLowerCase();
179			if (labelString.startsWith(searchMe)) {
180			hits.add(createSearchResult(f, value.toString(), ml
181	alfonx	153	.getTitle(),ml));
182	alfonx	139	} else {
183			final String[] parts = labelString.trim().split(" ");
184			for (final String part : parts) {
185			if (part.startsWith(searchMe)) {
186			hits.add(createSearchResult(f, value.toString(), ml
187	alfonx	153	.getTitle(), ml));
188	alfonx	139	break;
189			}
190			}
191			}
192
193			}
194
195			} catch (final IOException e) {
196			// Searching this layer failed
197			LOGGER.error(e);
198			}
199			} // next layer
200
201			// Hits from the top-most layer should appear first.
202			Collections.reverse(hits);
203
204			return hits;
205			}
206
207	alfonx	318	protected SearchResult createSearchResult(final SimpleFeature f, final String title,
208	alfonx	153	final String inTitle, MapLayer ml) {
209			return new SearchResultFeature(f, title, inTitle, mapPane, ml);
210	alfonx	139	}
211
212			}
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