/*
* Copyright (C) 2007-2008-2009 GeoSolutions S.A.S.
* http://www.geo-solutions.it
*
* GPLv3 + Classpath exception
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.geoserver.sldservice.rest.resource;
import java.awt.Color;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.transform.TransformerException;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.xml.XMLSerializer;
import org.geoserver.catalog.Catalog;
import org.geoserver.catalog.FeatureTypeInfo;
import org.geoserver.catalog.LayerInfo;
import org.geoserver.catalog.ResourceInfo;
import org.geoserver.catalog.rest.AbstractCatalogResource;
import org.geoserver.rest.RestletException;
import org.geoserver.rest.format.DataFormat;
import org.geoserver.rest.format.ReflectiveHTMLFormat;
import org.geoserver.rest.format.ReflectiveJSONFormat;
import org.geoserver.rest.format.ReflectiveXMLFormat;
import org.geoserver.sldservice.utils.classifier.ColorRamp;
import org.geoserver.sldservice.utils.classifier.RulesBuilder;
import org.geoserver.sldservice.utils.classifier.impl.BlueColorRamp;
import org.geoserver.sldservice.utils.classifier.impl.CustomColorRamp;
import org.geoserver.sldservice.utils.classifier.impl.RandomColorRamp;
import org.geoserver.sldservice.utils.classifier.impl.RedColorRamp;
import org.geoserver.sldservice.utils.classifier.impl.JetColorRamp;
import org.geoserver.sldservice.utils.classifier.impl.GrayColorRamp;
import org.geotools.feature.FeatureCollection;
import org.geotools.styling.Rule;
import org.geotools.styling.SLDTransformer;
import org.geotools.util.NullProgressListener;
import org.opengis.feature.type.FeatureType;
import org.restlet.Context;
import org.restlet.data.Form;
import org.restlet.data.Request;
import org.restlet.data.Response;
import org.restlet.data.Status;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.thoughtworks.xstream.io.json.JettisonMappedXmlDriver;
import com.vividsolutions.jts.geom.LineString;
import com.vividsolutions.jts.geom.MultiLineString;
import com.vividsolutions.jts.geom.MultiPoint;
import com.vividsolutions.jts.geom.MultiPolygon;
import com.vividsolutions.jts.geom.Point;
import com.vividsolutions.jts.geom.Polygon;
import freemarker.ext.beans.CollectionModel;
import freemarker.template.Configuration;
import freemarker.template.SimpleHash;
/**
* @author Alessio Fabiani, GeoSolutions SAS
*/
public class ClassifierResource extends AbstractCatalogResource {
private final static Logger LOGGER = Logger.getLogger(ClassifierResource.class.toString());
final private RulesBuilder builder = new RulesBuilder();
public ClassifierResource(Context context, Request request, Response response, Catalog catalog) {
super(context, request, response, ClassifierResource.class, catalog);
}
@Override
protected Object handleObjectGet() throws Exception {
final Request req = getRequest();
final Map<String,Object> attributes = req.getAttributes();
final Form parameters = req.getResourceRef().getQueryAsForm();
final String layer = getAttribute("layer");
if (layer == null) {
return new ArrayList();
}
final LayerInfo layerInfo = catalog.getLayerByName(layer);
if (layerInfo != null) {
final List<Rule> rules = this.generateClassifiedSLD(attributes, parameters);
RulesList jsonRules = null;
if (rules != null)
jsonRules = generateRulesList(layer, getRequest(), rules);
if (jsonRules != null) {
return jsonRules;
} else {
throw new RestletException("Error generating Classification!", Status.CLIENT_ERROR_BAD_REQUEST);
}
}
return new ArrayList();
}
@Override
public boolean allowPost() {
return false;
}
@Override
protected String handleObjectPost(Object object) {
return null;
}
@Override
protected void handleObjectPut(Object object) {
// do nothing, we do not allow post
}
private RulesList generateRulesList(String layer, Request req, List<Rule> rules) {
final RulesList ruleList = new RulesList(layer);
for (Rule rule : rules) {
ruleList.addRule(jsonRule(rule));
}
return ruleList;
}
/**
*
*/
@Override
protected ReflectiveXMLFormat createXMLFormat(Request request, Response response) {
return new ReflectiveXMLFormat() {
@Override
protected void write(Object data, OutputStream output)
throws IOException {
XStream xstream = new XStream();
xstream.setMode(XStream.NO_REFERENCES);
// Aliases
xstream.alias("Rules", RulesList.class);
// Converters
xstream.registerConverter(new RulesListConverter());
// Marshalling
xstream.toXML(data, output);
}
};
}
/**
* @see
* org.geoserver.catalog.rest.AbstractCatalogResource#createJSONFormat(org
* .restlet.data.Request, org.restlet.data.Response)
*/
@Override
protected ReflectiveJSONFormat createJSONFormat(Request request, Response response) {
return new ReflectiveJSONFormat() {
/**
* @see
* org.geoserver.rest.format.ReflectiveJSONFormat#write(java.lang
* .Object, java.io.OutputStream)
*/
@Override
protected void write(Object data, OutputStream output)
throws IOException {
XStream xstream = new XStream(new JettisonMappedXmlDriver());
xstream.setMode(XStream.NO_REFERENCES);
// Aliases
xstream.alias("Rules", RulesList.class);
// Converters
xstream.registerConverter(new RulesListConverter());
// Marshalling
xstream.toXML(data, new OutputStreamWriter(output, "UTF-8"));
}
};
}
/**
*
* @see
* org.geoserver.catalog.rest.CatalogResourceBase#createHTMLFormat(org.restlet
* .data.Request, org.restlet.data.Response)
*/
@Override
protected DataFormat createHTMLFormat(Request request, Response response) {
return new ReflectiveHTMLFormat(RulesList.class, request, response, this) {
@Override
protected Configuration createConfiguration(Object data, Class clazz) {
final Configuration cfg = super.createConfiguration(data, clazz);
cfg.setClassForTemplateLoading(getClass(), "templates");
cfg.setObjectWrapper(new ObjectToMapWrapper<RulesList>(RulesList.class) {
@Override
protected void wrapInternal(Map properties, SimpleHash model, RulesList object) {
properties.put( "rules", new CollectionModel( object.rules, new ObjectToMapWrapper(RulesList.class) ) );
}
});
return cfg;
}
};
}
/**
*
* @param rule
* @return a string with json Rule representation
*/
private JSONObject jsonRule(Rule rule) {
JSONObject ruleSz = null;
String xmlRule;
XMLSerializer xmlS = new XMLSerializer();
SLDTransformer transform = new SLDTransformer();
transform.setIndentation(2);
try {
xmlRule = transform.transform(rule);
xmlS.setRemoveNamespacePrefixFromElements(true);
xmlS.setSkipNamespaces(true);
ruleSz = (JSONObject) xmlS.read(xmlRule);
} catch (TransformerException e) {
if (LOGGER.isLoggable(Level.FINE))
LOGGER.log(Level.FINE, "Exception occurred while transformin the Rule "
+ e.getLocalizedMessage(),e);
}
return ruleSz;
}
private List<Rule> generateClassifiedSLD(Map<String,Object> attributes, Form form) {
/* Looks in attribute map if there is the featureType param */
if (attributes.containsKey("layer")) {
final String layerName = (String) attributes.get("layer");
final String property = form.getFirstValue("attribute");
final String method = form.getFirstValue("method", "equalInterval");
final String intervals = form.getFirstValue("intervals", "2");
final String open = form.getFirstValue("open", "false");
final String colorRamp = form.getFirstValue("ramp");
final boolean reverse = Boolean.parseBoolean(form.getFirstValue("reverse"));
if (property != null && property.length() > 0) {
/* First try to find as a FeatureType */
try {
LayerInfo layerInfo = catalog.getLayerByName(layerName);
if (layerInfo != null) {
ResourceInfo obj = layerInfo.getResource();
/* Check if it's feature type or coverage */
if (obj instanceof FeatureTypeInfo) {
final FeatureType ftType = ((FeatureTypeInfo) obj).getFeatureType();
final FeatureCollection ftCollection = ((FeatureTypeInfo) obj).getFeatureSource(new NullProgressListener(), null).getFeatures();
List<Rule> rules = null;
if ("equalInterval".equals(method)) {
rules = builder.equalIntervalClassification(ftCollection, property, Integer.parseInt(intervals), Boolean.parseBoolean(open));
} else if ("uniqueInterval".equals(method)) {
rules = builder.uniqueIntervalClassification(ftCollection, property);
} else if ("quantile".equals(method)) {
rules = builder.quantileClassification(ftCollection, property, Integer.parseInt(intervals), Boolean.parseBoolean(open));
} else if ("jenks".equals(method)) {
rules = builder.jenksClassification(ftCollection, property, Integer.parseInt(intervals), Boolean.parseBoolean(open));
}
if (colorRamp != null && colorRamp.length() > 0) {
ColorRamp ramp = null;
if (colorRamp.equalsIgnoreCase("random"))
ramp = (ColorRamp) new RandomColorRamp();
else if (colorRamp.equalsIgnoreCase("red"))
ramp = (ColorRamp) new RedColorRamp();
else if (colorRamp.equalsIgnoreCase("blue"))
ramp = (ColorRamp) new BlueColorRamp();
else if (colorRamp.equalsIgnoreCase("jet"))
ramp = (ColorRamp) new JetColorRamp();
else if (colorRamp.equalsIgnoreCase("gray"))
ramp = (ColorRamp) new GrayColorRamp();
else if (colorRamp.equalsIgnoreCase("custom")) {
Color startColor = Color.decode(form.getFirst("startColor").getValue());
Color endColor = Color.decode(form.getFirst("endColor").getValue());
Color midColor = (form.contains("midColor") ? Color.decode(form.getFirst("midColor").getValue()) : null);
if (startColor != null && endColor != null) {
CustomColorRamp tramp = new CustomColorRamp();
tramp.setStartColor(startColor);
tramp.setEndColor(endColor);
if (midColor != null)
tramp.setMid(midColor);
ramp = (ColorRamp) tramp;
}
}
final Class geomT = ftType.getGeometryDescriptor().getType().getBinding();
/*
* Line Symbolizer
*/
if (geomT == LineString.class || geomT == MultiLineString.class) {
builder.lineStyle(rules, ramp, reverse);
}
/*
* Polygon Symbolyzer
*/
else if (geomT == MultiPolygon.class
|| geomT == Polygon.class
|| geomT == Point.class
|| geomT == MultiPoint.class) {
builder.polygonStyle(rules, ramp, reverse);
}
}
return rules;
}
}
} catch (NoSuchElementException e) {
if (LOGGER.isLoggable(Level.FINE))
LOGGER.log(Level.FINE,"The following exception has occurred "
+ e.getLocalizedMessage(), e);
return null;
} catch (IOException e) {
if (LOGGER.isLoggable(Level.FINE))
LOGGER.log(Level.FINE, "The following exception has occurred "
+ e.getLocalizedMessage(), e);
return null;
}
} else
return null;
} else
return null;
return null;
}
/**
*
* @author Fabiani
*
*/
public class RulesList {
private String layerName;
private List<JSONObject> rules = new ArrayList<JSONObject>();
public RulesList(final String layer) {
setLayerName(layer);
}
public void addRule(JSONObject object) {
rules.add(object);
}
public List<JSONObject> getRules() {
return rules;
}
/**
* @param layerName the layerName to set
*/
public void setLayerName(String layerName) {
this.layerName = layerName;
}
/**
* @return the layerName
*/
public String getLayerName() {
return layerName;
}
}
/**
*
* @author Fabiani
*
*/
public class RulesListConverter implements Converter {
/**
* @see
* com.thoughtworks.xstream.converters.ConverterMatcher#canConvert(java
* .lang.Class)
*/
public boolean canConvert(Class clazz) {
return RulesList.class.isAssignableFrom(clazz);
}
/**
* @see
* com.thoughtworks.xstream.converters.Converter#marshal(java.lang.Object
* , com.thoughtworks.xstream.io.HierarchicalStreamWriter,
* com.thoughtworks.xstream.converters.MarshallingContext)
*/
public void marshal(Object value, HierarchicalStreamWriter writer,
MarshallingContext context) {
RulesList obj = (RulesList) value;
for (JSONObject rule : obj.getRules()) {
if (!rule.isEmpty() && !rule.isNullObject() && !rule.isArray()) {
writer.startNode("Rule");
for (Object key : rule.keySet()) {
writer.startNode((String) key);
writeChild(writer, rule.get(key));
writer.endNode();
}
writer.endNode();
}
}
}
private void writeChild(HierarchicalStreamWriter writer, Object object) {
if (object instanceof JSONObject && !((JSONObject) object).isArray()) {
for (Object key : ((JSONObject) object).keySet()) {
final Object obj = ((JSONObject) object).get(key);
if (obj instanceof JSONArray) {
for (int i = 0; i < ((JSONArray) obj).size(); i++) {
final JSONObject child = (JSONObject) ((JSONArray) obj).get(i);
writer.startNode((String) key);
for (Object cKey : child.keySet()) {
if (!((String) cKey).startsWith("@")) {
writer.startNode((String) cKey);
writeChild(writer, child.get(cKey));
writer.endNode();
} else {
writer.addAttribute(((String) cKey).substring(1), (String) child.get(cKey));
}
}
writer.endNode();
}
}
else if (((String)key).startsWith("@")){
writer.addAttribute(((String) key).substring(1), (String)obj);
}
else if (((String)key).startsWith("#text")){
writer.setValue((String) obj);
} else {
writer.startNode((String) key);
writeChild(writer, obj);
writer.endNode();
}
}
} else if (object instanceof JSONArray) {
for (int i = 0; i < ((JSONArray) object).size(); i++) {
final Object child = ((JSONArray) object).get(i);
if (child instanceof JSONObject) {
for (Object key : ((JSONObject) child).keySet()) {
if (((JSONObject) child).get(key) instanceof String)
writer.addAttribute((String) key, (String) ((JSONObject) child).get(key));
else
writeChild(writer, ((JSONObject) child).get(key));
}
} else {
writeChild(writer, child);
}
}
} else {
writer.setValue(object.toString());
}
}
/**
*
* @seecom.thoughtworks.xstream.converters.Converter#unmarshal(com.
* thoughtworks.xstream.io. HierarchicalStreamReader,
* com.thoughtworks.xstream.converters.UnmarshallingContext)
*/
public Object unmarshal(HierarchicalStreamReader arg0,
UnmarshallingContext arg1) {
// TODO Auto-generated method stub
return null;
}
}
}