geotools/labelsearch/LabelSearch.java

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.Feature;
import org.geotools.feature.FeatureCollection;
import org.geotools.feature.FeatureType;
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 FeatureType 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<Feature> fi = features.iterator();
                                while (fi.hasNext()) {
                                        final Feature 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()));
                                        } else {
                                                final String[] parts = labelString.trim().split(" ");
                                                for (final String part : parts) {
                                                        if (part.startsWith(searchMe)) {
                                                                hits.add(createSearchResult(f, value.toString(), ml
                                                                                .getTitle()));
                                                                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 Feature f, final String title,
                        final String inTitle) {
                return new SearchResultFeature(f, title, inTitle, mapPane);
        }

}
1	package skrueger.geotools.labelsearch;
2
3	import java.io.IOException;
4	import java.util.ArrayList;
5	import java.util.Collections;
6	import java.util.Iterator;
7	import java.util.List;
8	import java.util.Locale;
9
10	import org.apache.log4j.Logger;
11	import org.geotools.data.DefaultQuery;
12	import org.geotools.feature.AttributeType;
13	import org.geotools.feature.Feature;
14	import org.geotools.feature.FeatureCollection;
15	import org.geotools.feature.FeatureType;
16	import org.geotools.map.MapLayer;
17	import org.geotools.styling.Style;
18	import org.geotools.styling.TextSymbolizer;
19	import org.opengis.filter.Filter;
20	import org.opengis.filter.expression.Expression;
21	import org.opengis.filter.expression.PropertyName;
22
23	import schmitzm.geotools.styling.StylingUtil;
24	import schmitzm.lang.LangUtil;
25	import schmitzm.lang.ResourceProvider;
26
27	/**
28	* This class allows to search for a {@link String} in a map. The algorithm will
29	* analyze the {@link Style} of every visible(?) layer and determine the label
30	* attribute. This field is then searched for every feature.
31	*
32	* @author Stefan A. Krüger
33	*
34	*/
35	public class LabelSearch {
36	final static private Logger LOGGER = Logger.getLogger(LabelSearch.class);
37
38	public static ResourceProvider RESOURCE = new ResourceProvider(LangUtil
39	.extendPackagePath(LabelSearch.class,
40	"labelsearch"), Locale.ENGLISH);
41
42
43
44
45	public static String R(String key, Object... values) {
46	return RESOURCE.getString(key, values);
47	}
48
49	protected final schmitzm.geotools.gui.JMapPane mapPane;
50
51	public LabelSearch(final schmitzm.geotools.gui.JMapPane mapPane) {
52	this.mapPane = mapPane;
53	}
54
55	private AttributeType getLabelAttribute(final TextSymbolizer ts,
56	final FeatureType schema) {
57	if (ts == null) {
58	// This layer has no labels
59	return null;
60	}
61	final Expression labelExp = ts.getLabel();
62	if (labelExp instanceof PropertyName) {
63	final PropertyName pn = (PropertyName) labelExp;
64	final String propertyName = pn.getPropertyName();
65	return schema.getAttributeType(propertyName);
66	} else {
67	// When does this happen
68	}
69
70	return null;
71	}
72
73	public List<SearchResult> search(final String string) {
74
75	final String searchMe = string.toLowerCase();
76
77	final ArrayList<SearchResult> hits = new ArrayList<SearchResult>();
78
79	for (final MapLayer ml : mapPane.getContext().getLayers()) {
80	try {
81
82	// System.out.println("layer = "+ml.getTitle());
83
84	if (!ml.isVisible())
85	continue;
86
87	final List<TextSymbolizer> allTS = StylingUtil.getTextSymbolizers(ml
88	.getStyle());
89	if (allTS.size() == 0) {
90	// A layer without any TextSymbolizer doesn't have to be
91	// searched any more.
92	continue;
93	}
94
95	final String typeName = ml.getFeatureSource().getSchema()
96	.getTypeName();
97
98	// Expression labelExp = ts.getLabel();
99	// ff.like(labelExp, ""+searchMe+"");
100	// FeatureCollection features =
101	// ml.getFeatureSource().getFeatures(
102	// new DefaultQuery(typeName, ff.like(labelExp,
103	// ""+searchMe+""), properties));
104
105	final FeatureCollection features = ml.getFeatureSource().getFeatures(
106	new DefaultQuery(typeName, Filter.INCLUDE));
107
108	// new MemoryDataStore().getFeatureSource(typeName)
109
110	/**
111	* We do the comparison NOT with a ff.like, because that doesn't
112	* support case insensitivity and i don't find a lower or UPPER
113	* function.
114	*/
115	final Iterator<Feature> fi = features.iterator();
116	while (fi.hasNext()) {
117	final Feature f = fi.next();
118
119	final TextSymbolizer ts = StylingUtil.getTextSymbolizer(ml
120	.getStyle(), f);
121	if (ts == null)
122	continue;
123
124	final AttributeType labelAttribute = getLabelAttribute(ts, ml
125	.getFeatureSource().getSchema());
126
127	if (labelAttribute == null) {
128	continue;
129	}
130
131	// System.out.println("labelAttrib local name" +
132	// labelAttribute.getLocalName());
133
134	final Object value = f
135	.getAttribute(labelAttribute.getLocalName());
136
137	// System.out.println("labelAttrib value " + value);
138
139	if (value == null) {
140	LOGGER.info("Skipping f: getLocalName() is null for feature="+f);
141	continue;
142	}
143
144	/**
145	* LabelString ist z.B. "IMPETUS pluviograph". Suchwort
146	* "plu" soll treffen. Also wird nach spaces zerlegt und
147	* dann gesucht
148	*/
149	final String labelString = value.toString().toLowerCase();
150	if (labelString.startsWith(searchMe)) {
151	hits.add(createSearchResult(f, value.toString(), ml
152	.getTitle()));
153	} else {
154	final String[] parts = labelString.trim().split(" ");
155	for (final String part : parts) {
156	if (part.startsWith(searchMe)) {
157	hits.add(createSearchResult(f, value.toString(), ml
158	.getTitle()));
159	break;
160	}
161	}
162	}
163
164	}
165
166	} catch (final IOException e) {
167	// Searching this layer failed
168	LOGGER.error(e);
169	}
170	} // next layer
171
172	// Hits from the top-most layer should appear first.
173	Collections.reverse(hits);
174
175	return hits;
176	}
177
178	protected SearchResult createSearchResult(final Feature f, final String title,
179	final String inTitle) {
180	return new SearchResultFeature(f, title, inTitle, mapPane);
181	}
182
183	}
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