Mercurial > mxd2map
view src/java/de/intevation/mxd/writer/MapScriptWriter.java @ 316:5e3a40a84539
Some minor cleanups
* src/java/de/intevation/mxd/reader/FeatureLayerReader.java:
Add Debug output if Layer class is not implemented
* src/java/de/intevation/mxd/reader/RasterLayerReader.java:
Remove unused import
* src/java/de/intevation/mxd/reader/WMSLayerReader.java:
Tune down warnings about min/max scale
author | Andre Heinecke <aheinecke@intevation.de> |
---|---|
date | Mon, 17 Sep 2012 17:10:44 +0200 |
parents | 1d77ea6a915d |
children | 5a2b5bc066eb |
line wrap: on
line source
/* * Copyright (c) 2011 by Intevation GmbH, Germany <info@intevation.de> * * This file is part of MXD2map. * * This program is free software under the LGPL (>=v2.1) * Read the file LICENCE.txt coming with the software for details * or visit http://www.gnu.org/licenses/ if it does not exist. * * MXD2map has been developed on behalf of the * Bundesamt fuer Seeschifffahrt und Hydrographie (BSH) in Hamburg * by Intevation GmbH. * * Authors: * Raimund Renkert <raimund.renkert@intevation.de> * Bjoern Schilberg <bjoern.schilberg@intevation.de> * Stephan Holl <stephan.holl@intevation.de> */ package de.intevation.mxd.writer; import org.apache.log4j.Logger; import java.awt.Color; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import java.io.File; import javax.xml.xpath.XPathConstants; import edu.umn.gis.mapscript.mapObj; import edu.umn.gis.mapscript.layerObj; import edu.umn.gis.mapscript.classObj; import edu.umn.gis.mapscript.labelObj; import edu.umn.gis.mapscript.colorObj; import edu.umn.gis.mapscript.fontSetObj; import edu.umn.gis.mapscript.hashTableObj; import edu.umn.gis.mapscript.shapeObj; import edu.umn.gis.mapscript.pointObj; import edu.umn.gis.mapscript.lineObj; import edu.umn.gis.mapscript.MS_UNITS; import edu.umn.gis.mapscript.MS_LAYER_TYPE; import edu.umn.gis.mapscript.MS_CONNECTION_TYPE; import edu.umn.gis.mapscript.MS_SHAPE_TYPE; import edu.umn.gis.mapscript.MS_FONT_TYPE; import edu.umn.gis.mapscript.MS_POSITIONS_ENUM; import de.intevation.mxd.utils.XMLUtils; import de.intevation.mxd.utils.MapScriptUtils; /** * The Mapfile Writer. * This Writer uses the MapScript Java API to create Mapfiles from a DOM. * * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a> */ public class MapScriptWriter implements IWriter { /** * The Logger. */ private static final Logger logger = Logger.getLogger(MapScriptWriter.class); /** * Private member. */ private Document root; private mapObj map; private MapScriptUtils msutils; private String mapFilename; private String MS_BINDIR = "c:/ms_6.1-dev/bin"; private String prefix = ""; private MS_UNITS units = MS_UNITS.MS_METERS; /** * Default constructor. * Creates a mapscript writer object with an empty map. */ public MapScriptWriter() { map = new mapObj(""); msutils = new MapScriptUtils(); mapFilename = ""; } /** * Contructor with template and output filename. * Creates a mapscript writer object with the given template that saves the * map to the filename. * * @param templ Mapfile template. * @param filename Output file name. */ public MapScriptWriter(String templ, String filename) { String path = System.getProperty("user.dir"); map = new mapObj(templ); msutils = new MapScriptUtils(); File f = new File(filename); mapFilename = filename; if(f.isAbsolute()) { map.setMappath(mapFilename); } else { map.setMappath( System.getProperty("user.dir") + File.separator + mapFilename); mapFilename = System.getProperty("user.dir") + File.separator + mapFilename; } String fontSetPath = map.getFontset().getFilename(); File fonts = new File(fontSetPath); String fontSet = fonts.getAbsolutePath(); fontSet = fontSet.replaceAll("\\\\", "/"); map.setFontSet(fontSet); } /** * Write the mapfile. * @param doc The root document containin the map attributes. * * @return Currently always true. */ public boolean write(Document doc) { logger.debug("write()"); this.root = doc; //Get the filename. Element fileNode = (Element)XMLUtils.xpath( root, "/mxd/file", XPathConstants.NODE); //Write the map attributes. writeMap(); //Write the layers. boolean ret = writeLayer(); //Save the map. if (ret) { mapObj cloneMap = map.cloneMap(); cloneMap.save(mapFilename); logger.info("Mapfile created: " + mapFilename); return true; } return false; } /** * Create the map object and set the attributes. */ private void writeMap() throws UnknownError { logger.debug("writeMap()"); //Get the map. Element mapNode = (Element)XMLUtils.xpath( root, "/mxd/map", XPathConstants.NODE); //Set the name. map.setName(mapNode.getAttribute("name")); map.setMetaData("wms_title", mapNode.getAttribute("name")); //Set the extent. map.setExtent( Double.parseDouble(mapNode.getAttribute("extent_min_x")), Double.parseDouble(mapNode.getAttribute("extent_min_y")), Double.parseDouble(mapNode.getAttribute("extent_max_x")), Double.parseDouble(mapNode.getAttribute("extent_max_y"))); map.setMetaData( "ows_extent", mapNode.getAttribute("extent_min_x") + ", " + mapNode.getAttribute("extent_min_y") + ", " + mapNode.getAttribute("extent_max_x") + ", " + mapNode.getAttribute("extent_max_y")); map.setSize(800, 600); //Set the units and projection. int proj = Integer.parseInt(mapNode.getAttribute("projection")); if(proj != 0) { try { map.setProjection("epsg:" + mapNode.getAttribute("projection")); } catch(UnknownError e) { logger.error( "Could not set projection: " + mapNode.getAttribute("projection") + ". Please ensure that it is described in your espg file."); throw e; } } String u = mapNode.getAttribute("units"); if(u.equals("feet")) { units = MS_UNITS.MS_FEET; } else if(u.equals("inches")) { units = MS_UNITS.MS_INCHES; } else if(u.equals("kilometers")) { units = MS_UNITS.MS_KILOMETERS; } else if(u.equals("meters")) { units = MS_UNITS.MS_METERS; } else if(u.equals("miles")) { units = MS_UNITS.MS_MILES; } else if(u.equals("nauticalmiles")) { units = MS_UNITS.MS_NAUTICALMILES; } else if(u.equals("points")) { units = MS_UNITS.MS_PIXELS; } else if(u.equals("degree")) { units = MS_UNITS.MS_DD; } else { units = MS_UNITS.MS_METERS; } map.setUnits(units); String mproj = mapNode.getAttribute("projection"); if(mproj != null && !mproj.equals("") && ! mproj.equals("0")) { MapScriptUtils msu = new MapScriptUtils(); String wmssrs = msu.getMetaData(map, "wms_srs"); String owssrs = msu.getMetaData(map, "ows_srs"); if(wmssrs.indexOf(mproj) < 0) { if(wmssrs.equals("")) { wmssrs = "EPSG:"; } else { wmssrs += " EPSG:"; } wmssrs += mproj; } if(owssrs.indexOf(mproj) < 0) { if(owssrs.equals("")) { owssrs = "EPSG:"; } else { owssrs += " EPSG:"; } owssrs += mproj; } map.setMetaData("ows_srs", owssrs); map.setMetaData("wms_srs", wmssrs); } } /** * Create layer objects and set the attributes. */ private boolean writeLayer() { logger.debug("writeLayer()"); Element mapNode = (Element)XMLUtils.xpath( root, "/mxd/map", XPathConstants.NODE); NodeList list = mapNode.getElementsByTagName("layer"); for(int i = 0; i < list.getLength(); i++) { Element layerElement = (Element)list.item(i); layerObj layer = new layerObj(map); NodeList renderer = layerElement.getElementsByTagName("renderer"); //The layer name. String group = ""; if(layerElement.hasAttribute("group")) { group = layerElement.getAttribute("group"); String[] splitted = group.split("/"); String cleangroup = ""; for(int j = 0; j < splitted.length; j++) { if(!splitted[j].equals("")) { splitted[j] = msutils.replaceUmlauts(splitted[j]); cleangroup += "/" + msutils.removeSpecialChars(splitted[j]); } } group = cleangroup; } String lname = layerElement.getAttribute("name"); lname = msutils.removeSpecialChars(lname); lname = msutils.replaceUmlauts(lname); String ulgroup = group.replaceAll("/", "."); String ulname = ulgroup + "." + lname; if(ulname.startsWith(".")) { ulname = ulname.substring(1); } if(ulgroup.startsWith(".")) { ulgroup = ulgroup.substring(1); } layer.setName(ulname); layer.setUnits(units.swigValue()); if(!group.equals("")) { layer.setGroup(ulgroup); layer.setMetaData("wms_layer_group", group); } layer.setMetaData("wms_title", ulname); //Set the projection for the Layers if (layerElement.hasAttribute("projection")) { int proj = Integer.parseInt(layerElement.getAttribute("projection")); if(proj != 0) { try { layer.setProjection("epsg:" + layerElement.getAttribute("projection")); } catch(UnknownError e) { logger.error( "Could not set projection in layer: " + layerElement.getAttribute("projection") + ". Please ensure that it is described in your espg file."); throw e; } } } // Projection metadata. String mproj = mapNode.getAttribute("projection"); if (layerElement.hasAttribute("projection")) { // Overwrite the Map Projection in the layer mproj = layerElement.getAttribute("projection"); } if(mproj != null && !mproj.equals("") && !mproj.equals("0")) { String wmssrs = layer.getMetaData("wms_srs"); String owssrs = layer.getMetaData("ows_srs"); if(wmssrs == null) { wmssrs = "EPSG:"; } else { wmssrs += " EPSG:"; } if(owssrs == null) { owssrs = "EPSG:"; } else { owssrs += " EPSG:"; } wmssrs += mproj; owssrs += mproj; layer.setMetaData("wms_srs", wmssrs); layer.setMetaData("ows_srs", owssrs); } // WMS Version if (layerElement.hasAttribute("wms_server_version")) { layer.setMetaData("wms_server_version", layerElement.getAttribute("wms_server_version")); } // WMS Version if (layerElement.hasAttribute("imageType")) { layer.setMetaData("wms_format", layerElement.getAttribute("imageType")); } // The layer extent metadata. if(layerElement.hasAttribute("extent_min_x") && layerElement.hasAttribute("extent_max_x") && layerElement.hasAttribute("extent_min_y") && layerElement.hasAttribute("extent_max_y")) { layer.setMetaData( "ows_extent", layerElement.getAttribute("extent_min_x") + ", " + layerElement.getAttribute("extent_min_y") + ", " + layerElement.getAttribute("extent_max_x") + ", " + layerElement.getAttribute("extent_max_y")); } //The layer status. String stat = layerElement.getAttribute("status"); if (stat.equals("on")) { layer.setStatus(1); } else { layer.setStatus(0); } //The scale. double maxScale = 0; double minScale = 0; try { maxScale = Double.parseDouble(layerElement.getAttribute("min_scale")); minScale = Double.parseDouble(layerElement.getAttribute("max_scale")); } catch(NumberFormatException nfe) { logger.warn("Error setting scale."); maxScale = 0; minScale = 0; } layer.setMaxscaledenom(maxScale); layer.setMinscaledenom(minScale); //The layer type. String type = layerElement.getAttribute("type"); if(type.equals("point")) { layer.setType(MS_LAYER_TYPE.MS_LAYER_POINT); layer.setTileitem(""); } else if (type.equals("line")) { layer.setType(MS_LAYER_TYPE.MS_LAYER_LINE); layer.setTileitem(""); } else if (type.equals("polygon")) { layer.setType(MS_LAYER_TYPE.MS_LAYER_POLYGON); layer.setTileitem(""); } else if(type.equals("raster")) { layer.setType(MS_LAYER_TYPE.MS_LAYER_RASTER); } //The layer datasource. String con_type = layerElement.getAttribute("connection_type"); if(con_type.equals("local")) { // The data source is a local file. (.shp or Image) String datasource = ""; if(layerElement.hasAttribute("workspace")) { datasource = layerElement.getAttribute("workspace"); datasource += File.separator; } datasource += layerElement.getAttribute("data_source"); datasource = datasource.replaceAll("\\\\", "/"); layer.setData(datasource); } else if(con_type.equals("SDE") && !type.equals("raster")) { // The data source is a sde database. logger.info( "SDE datasource found." + " Please edit password in mapfile."); layer.setConnectionType( MS_CONNECTION_TYPE.MS_PLUGIN.swigValue(), MS_BINDIR + "/ms/plugins/msplugin_sde_93.dll"); String database_auth = layerElement.getAttribute("database"); if (database_auth.equals("") || database_auth == null) { logger.warn("Could not set the database connection user." + " Setting to \"sde\" as default."); database_auth = "sde"; } String port = layerElement.getAttribute("instance"); StringBuffer strBuff = new StringBuffer(); char c; for (int j = 0; j < port.length() ; j++) { c = port.charAt(j); if(Character.isDigit(c)) { strBuff.append(c); } } layer.setConnection( layerElement.getAttribute("server") + "," + "port:" + strBuff.toString() + "," + database_auth + "," + layerElement.getAttribute("user") + ",<PASSWORD>"); layer.setData( layerElement.getAttribute("data_source") + ",SHAPE," + layerElement.getAttribute("version")); layer.setProcessing("CLOSE_CONNECTION=defer"); layer.setProcessing("ATTRIBUTE_QUALIFIED=TRUE"); if(layerElement.hasAttribute("join_table")) { logger.info( "The layer " + layer.getName() + " contains a jointable attribute." + " Please verify the attribute parameters."); String join = layerElement.getAttribute("join_table"); layer.setProcessing( "JOINTABLE=" + layerElement.getAttribute("join_table")); layer.setFilter( "where " + layerElement.getAttribute("definition_query") + " AND " + layerElement.getAttribute("join_table_target") + "." + layerElement.getAttribute("join_field_target") + "=" + layerElement.getAttribute("join_table") + "." + layerElement.getAttribute("join_field")); } else { prefix = layerElement.getAttribute("data_source"); if (!prefix.isEmpty()) { prefix += "."; } if(layerElement.hasAttribute("definition_query") && !layerElement.getAttribute("definition_query") .equals("")) { layer.setFilter("where " + layerElement.getAttribute("definition_query")); } } } else if(con_type.equals("SDE") && type.equals("raster")) { // The data source is a sde database. logger.info( "SDE datasource found." + " Please edit password in mapfile."); String database_auth = layerElement.getAttribute("database"); if (database_auth.equals("") || database_auth == null) { logger.warn("Could not set the database connection user." + " Setting to \"sde\" as default."); database_auth = "sde"; } String port = layerElement.getAttribute("instance"); StringBuffer strBuff = new StringBuffer(); char c; for (int j = 0; j < port.length() ; j++) { c = port.charAt(j); if(Character.isDigit(c)) { strBuff.append(c); } } layer.setData( "SDE:" + layerElement.getAttribute("server") + "," + strBuff + "," + layerElement.getAttribute("database") + "," + layerElement.getAttribute("user") + ",<PASSWORD>," + layerElement.getAttribute("dataset")); layer.setType(MS_LAYER_TYPE.MS_LAYER_RASTER); if(layerElement.hasAttribute("definition_query") && !layerElement.getAttribute("definition_query").equals("")) { layer.setFilter("where " + layerElement.getAttribute("definition_query")); } } else if(con_type.equals("WMS")) { layer.setType(MS_LAYER_TYPE.MS_LAYER_RASTER); layer.setConnection(layerElement.getAttribute("connection")); layer.setConnectionType(MS_CONNECTION_TYPE.MS_WMS.swigValue(), ""); layer.setMetaData("wms_name", layerElement.getAttribute("wms_name")); } else if(con_type.equals("ogr")) { layer.setConnectionType(MS_CONNECTION_TYPE.MS_OGR.swigValue(), ""); layer.setConnection(layerElement.getAttribute("connection")); layer.setData(layerElement.getAttribute("data_source")); } if(!type.equals("raster")) { layer.setTemplate("PleaseInsertAValidTemplateForGFI"); } // Set Offsite value for raster layer if(type == "raster") { layer.setOffsite(new colorObj(255,255,255,-4)); } // Create labelitem NodeList labels = layerElement.getElementsByTagName("label"); if(labels.getLength() > 0) { Element label = (Element)labels.item(0); String expr = label.getAttribute("expression"); expr = expr.replaceAll("\\[", ""); expr = expr.replaceAll("\\]", ""); if (con_type == "ogr") { // ogr expression fields come prefixed from arcgis // the prefix has to be removed in order to work with // mapserver String unwantedPrefix = layerElement.getAttribute("data") + "."; logger.debug("Removing expression Prefix: " + unwantedPrefix); boolean isShapeFile = false; if (layerElement.getAttribute("connection_type") == "local") { isShapeFile = true; } expr = sanitizeAttribute(expr, unwantedPrefix, prefix, isShapeFile); } if(!prefix.equals("")) { expr = prefix + "." + expr; } layer.setLabelitem(expr.trim()); } //Write elements. writeFeatures(layer, layerElement); //Write classes. writeClass(layer, layerElement); } return true; } /** * Adds the elements (Features) to the layer. * @param layer Mapscript layer object. * @param layerElement Dom element containing the feature attributes. */ private void writeFeatures(layerObj layer, Element layerElement) { NodeList list = layerElement.getElementsByTagName("feature"); for(int i = 0; i < list.getLength(); i++) { logger.debug("Writing an element"); Element feature = (Element)list.item(i); pointObj poi = new pointObj( Double.parseDouble(feature.getAttribute("X")), Double.parseDouble(feature.getAttribute("Y")), 0.0, -2e38); lineObj line = new lineObj(); line.add(poi); logger.debug("Set the line"); shapeObj shape = new shapeObj(MS_SHAPE_TYPE.MS_SHAPE_POINT.swigValue()); shape.add(line); shape.setText(feature.getAttribute("text")); // Write the Style / Symbol once if ( i == 0 ) { classObj co = new classObj(layer); writeLabel(co, feature, layerElement.getAttribute("type")); MarkerStyleWriter swriter = new MarkerStyleWriter (this.map, co); swriter.write((Element)feature.getFirstChild()); } layer.addFeature(shape); } } /** * Adds the classes to the layer. * @param layer Mapscript layer object. * @param layerElement Dom element containing the class attributes. */ private void writeClass(layerObj layer, Element layerElement) { logger.debug("writeClass(layerObj, Element)"); //Get all renderer elements (renderer in arcgis equals class in the //mapfile.) NodeList list = layerElement.getElementsByTagName("renderer"); //Create all found class objects and write the symbols and styles for //each class. for(int i = 0; i < list.getLength(); i++) { Element classElement = (Element)list.item(i); classObj co = new classObj(layer); String name = classElement.getAttribute("label"); name = msutils.replaceUmlauts(name); if (name.equals("")) { name = layerElement.getAttribute("name"); name = msutils.replaceUmlauts(name); if (list.getLength() > 1) { name += "-" + i; } } co.setName (name); //Create label object. NodeList labels = layerElement.getElementsByTagName("label"); if(labels.getLength() > 0) { Element labelElement = (Element)labels.item(0); String layerType = layerElement.getAttribute("type"); writeLabel(co, labelElement, layerType); } //Create definition expression. if(classElement.hasAttribute("field_count")) { String unwantedPrefix = layerElement.getAttribute("data") + "."; boolean isShapeFile = false; if (layerElement.getAttribute("connection_type") == "local") { isShapeFile = true; } co.setExpression(createExpression(classElement, i, unwantedPrefix, isShapeFile)); } //Write symbols and styles. NodeList l = classElement.getChildNodes(); for (int j = l.getLength() - 1; j >= 0; j--) { Element elem = (Element)l.item(j); String type = layerElement.getAttribute("type"); if(type.equals("point") && elem.getTagName().equals("symbol")) { MarkerStyleWriter swriter = new MarkerStyleWriter (this.map, co); swriter.write (elem); } else if(type.equals("line") && elem.getTagName().equals("symbol")) { LineStyleWriter swriter = new LineStyleWriter (this.map, co); swriter.write (elem); } else if(type.equals("polygon") && elem.getTagName().equals("symbol")) { FillStyleWriter swriter = new FillStyleWriter (this.map, co); swriter.write (elem); } } } } /** * Create a label object in a class object. * * @param co Class object. * @param labelElement DOM element containing label attributes. * @param layertype The layer type. Used to define the label position. */ private void writeLabel( classObj co, Element labelElement, String layerType) { //Get the label object. Each class has a predefined labelobject. labelObj label = co.getLabel(); //Get the label text symbol attributes from DOM. Element symbol = (Element)labelElement.getFirstChild(); if(symbol != null && symbol.getTagName().equals("symbol")) { String type = symbol.getAttribute("type"); if(type.equals("text")) { label.setType(MS_FONT_TYPE.MS_TRUETYPE); } label.setSize(Double.parseDouble(symbol.getAttribute("size"))); if(symbol.hasAttribute("color")) { String c = symbol.getAttribute("color"); Color col = Color.decode(c); colorObj color = new colorObj( col.getRed(), col.getGreen(), col.getBlue(), -4); label.setColor(color); } if(symbol.hasAttribute("font")) { String font = symbol.getAttribute("font"); fontSetObj fso = this.map.getFontset(); hashTableObj fonts = fso.getFonts(); String mapFont = fonts.get(font,""); if(mapFont != null && !mapFont.equals("")) { label.setFont(font); } else { logger.info( "Could not find font " + font + " in font set. " + "Using FreeSans for labels."); label.setFont("FreeSans"); } } if(labelElement.hasAttribute("max_scale")) { double min = Double.parseDouble(labelElement.getAttribute("max_scale")); if(min > 0) { label.setMinscaledenom(min); } } if(labelElement.hasAttribute("min_scale")) { double max = Double.parseDouble(labelElement.getAttribute("min_scale")); if(max > 0) { label.setMaxscaledenom(max); } } //Set the label position. if(layerType.equals("point")) { label.setPosition(MS_POSITIONS_ENUM.MS_UC.swigValue()); } } } /** Sanitze an attribute * * Fixes invalid Field names and/or adds and removes a prefix * * @param attribute The Attribute to sanitize * @param prefixToRemove A Prefix that should be removed (empty otherwise) * @param prefixToAdd A Prefix that should be added (empty otherwise) * @param enforceShpLimit True if the attribute should follow shapefile * format restrictions. */ private String sanitizeAttribute(String attribute, String prefixToRemove, String prefixToAdd, boolean enforceShpLimit) { if (enforceShpLimit) { /* Workaround for non standard conform shapefile implementations * like the one used by ArcGis that appends the field type after the * eleventh character. Although the standard actually defines 10 * as the maximum length of Field Names GDAL handles the case where * the terminating 0 is actually a Character allowing for Field * names of up to 11 characters. */ if (attribute.length() > 10) { // Just remove the Type Delimiter if (attribute.endsWith("C") || attribute.endsWith("D") || attribute.endsWith("N") || attribute.endsWith("L") || attribute.endsWith("M")) { attribute = attribute.substring(0, attribute.length() - 1); } } } if (!prefixToRemove.isEmpty() && attribute.startsWith(prefixToRemove)) { attribute = attribute.replace(prefixToRemove, ""); } if (!prefixToAdd.isEmpty() && !attribute.startsWith(prefixToAdd)) { attribute = prefixToAdd + attribute; } return attribute; } /** * Create definition expression. * * @param ce DOM elementcontaining the class expression information. * @param index Index to determine the correct expression operator. * @param prefixToRemove A string that will be removed from the start of * expression fields. * @param isShapeFile true if shapefile attribute limits should be enforced */ private String createExpression(Element ce, int index, String prefixToRemove, boolean isShapeFile) { String expression = "("; int count = 0; try { count = Integer.parseInt(ce.getAttribute("field_count")); } catch(NumberFormatException nfe) { return ""; } if(count == 1) { //Create single field expression. try { //If no exception is thrown, the expression value is a number. Double.parseDouble(ce.getAttribute("value")); expression += "[" + sanitizeAttribute(ce.getAttribute("expression_field_0"), prefixToRemove, prefix, isShapeFile) + "]"; if(ce.hasAttribute("min_value")) { if(index == 0) { expression += " >= " + ce.getAttribute("min_value"); } else { expression += " > " + ce.getAttribute("min_value"); } expression += " AND [" + sanitizeAttribute(ce.getAttribute("expression_field_0"), prefixToRemove, prefix, isShapeFile) + "]"; expression += "]"; } expression += " " + ce.getAttribute("expression_operator"); expression += " " + ce.getAttribute("value") + ")"; } catch(NumberFormatException nfe) { //The expression value is a strings. expression += "\"["; expression += sanitizeAttribute(ce.getAttribute("expression_field_0"), prefixToRemove, prefix, isShapeFile) + "]"; expression += " " + ce.getAttribute("expression_operator"); expression += " \"" + ce.getAttribute("value") + "\")"; } catch(Exception e) { e.printStackTrace(); } } else { //Create a multi field expression. for (int i = 0; i < count; i++) { try { //If no exception is thrown, the expression values are //numbers. Double.parseDouble(ce.getAttribute("value_" + i)); expression += "["; expression += sanitizeAttribute(ce.getAttribute("expression_field_" + i), prefixToRemove, prefix, isShapeFile); expression += "]"; expression += " " + ce.getAttribute("expression_operator"); expression += " " + ce.getAttribute("value_" + i); if (i < count - 1) { expression += " AND "; } else { expression += ")"; } } catch (NumberFormatException nfe) { //The expression values are strings. expression += "\"["; expression += sanitizeAttribute(ce.getAttribute("expression_field_" + i), prefixToRemove, prefix, isShapeFile); expression += "]\""; expression += " " + ce.getAttribute("expression_operator"); expression += " \"" + ce.getAttribute("value_" + i); if (i < count - 1) { expression += "\" AND "; } else { expression += "\")"; } } } } return expression; } }