Mercurial > dive4elements > gnv-client
view gnv-artifacts/src/main/java/de/intevation/gnv/state/layer/LayerOutputState.java @ 782:725f7573b6ea
Added package description with text 'DOCUMENT ME!'.
gnv-artifacts/trunk@861 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 29 Mar 2010 10:28:32 +0000 |
parents | c4156275c1e1 |
children | feeaf5aec552 |
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package de.intevation.gnv.state.layer; import com.vividsolutions.jts.geom.Geometry; import com.vividsolutions.jts.io.ParseException; import com.vividsolutions.jts.io.WKTReader; import de.intevation.artifactdatabase.Config; import de.intevation.artifactdatabase.XMLUtils; import de.intevation.artifacts.ArtifactNamespaceContext; import de.intevation.artifacts.CallContext; import de.intevation.gnv.artifacts.context.GNVArtifactContext; import de.intevation.gnv.geobackend.base.Result; import de.intevation.gnv.geobackend.base.query.QueryExecutor; import de.intevation.gnv.geobackend.base.query.QueryExecutorFactory; import de.intevation.gnv.geobackend.base.query.exception.QueryException; import de.intevation.gnv.state.InputData; import de.intevation.gnv.state.OutputStateBase; import de.intevation.gnv.state.exception.StateException; import de.intevation.gnv.utils.ArtifactXMLUtilities; import de.intevation.gnv.utils.FileUtils; import de.intevation.gnv.utils.MapfileGenerator; import de.intevation.gnv.utils.MetaWriter; import de.intevation.gnv.utils.ShapeFileWriter; import java.io.File; import java.io.IOException; import java.io.OutputStream; import java.util.Collection; import java.util.Iterator; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; /** * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> * */ public class LayerOutputState extends OutputStateBase { /** * the logger, used to log exceptions and additonaly information */ private static Logger log = Logger.getLogger(LayerOutputState.class); /** * The UID of this Class. */ private static final long serialVersionUID = 9180957321704424049L; // TODO: Replace public static final String LAYER_MODEL = "layer"; /** * The ID for the Query fetching the Layer from the DB */ private String dataQueryID = null; /** * The ID for the Query fetching the Geometry from the DB * which should be used to Clip the Layerdata */ private String geometryQueryID = null; private String columnQueryID = null; /** * The ID for the Value which will hold the Geometrie-Value */ private String geometryID = null; private Boolean shapeFileLock = new Boolean(true); private String shapeFilePath; private String geometryType = null; private String templateID = null; public static final String SHAPEFILE_NAME = "data.shp"; /** * Constructor */ public LayerOutputState() { super(); } /** * @see de.intevation.gnv.state.OutputState#out(org.w3c.dom.Document, * java.util.Collection, java.io.OutputStream, * java.lang.String, de.intevation.artifacts.CallContext) */ public void out(Document format, Collection<InputData> inputData, OutputStream outputStream, String uuid, CallContext callContext) throws StateException { log.debug("LayerOutputState.out"); String outputMode = XMLUtils.xpathString( format, XPATH_OUTPUT_MODE, ArtifactNamespaceContext.INSTANCE); if (outputMode.equalsIgnoreCase("wms")) { Collection<Result> data = this.fetchData(); if (data != null && !data.isEmpty()){ XMLUtils.toStream(this.getWMS(uuid, callContext, data), outputStream); }else{ this.writeExceptionReport2Stream(outputStream); } }else if (outputMode.equalsIgnoreCase("zip")){ Collection<Result> data = this.fetchData(); if (data != null && !data.isEmpty()){ this.writeZip(uuid, callContext, outputStream, data); }else{ this.writeExceptionReport2Stream(outputStream); } } } /** * @param outputStream */ private void writeExceptionReport2Stream(OutputStream outputStream) { Document document = XMLUtils.newDocument(); new ArtifactXMLUtilities(). createExceptionReport("No Data to Export", document); XMLUtils.toStream(document,outputStream); } /** * Fetches the Data from the Databasebackend * @return */ protected Collection<Result> fetchData(){ log.debug("LayerOutputState.fetchData"); // TODO PUT ALL in CACHE Collection<Result> result = this.getData(this.queryID); Collection<Result> data = null; String geometryWKT = null; if (result != null){ QueryExecutor queryExecutor = QueryExecutorFactory.getInstance() .getQueryExecutor(); Iterator<Result> it = result.iterator(); String[] queryValues = null; if (it.hasNext()){ Result resultValue = it.next(); String table = resultValue.getString(0); String where = resultValue.getString(1); String columns = this.fetchColumns(table); templateID = resultValue.getString(2); if (this.geometryID != null){ InputData geometryInputData = this.inputData.get(this.geometryID); if (geometryInputData != null){ try { Collection<Result> geometryData = queryExecutor .executeQuery(this.geometryQueryID, new String[]{geometryInputData.getValue()}); Iterator<Result> git = geometryData.iterator(); if (git.hasNext()){ Result geometryValue = git.next(); geometryWKT = geometryValue.getString(0); } } catch (QueryException e) { log.error(e,e); // TODO: what should happen?? } queryValues = new String[]{columns, table, where, geometryWKT}; }else{ //Look into the presetting for an WKT InputData geometryWKTData = this.preSettings != null ? this.preSettings.get("geometry") : null ; if (geometryWKTData != null){ queryValues = new String[]{columns, table, where, geometryWKTData.getValue()}; }else{ queryValues = new String[]{columns,table,where}; } } }else{ //Look into the presetting for an WKT InputData geometryWKTData = this.preSettings != null ? this.preSettings.get("geometry") : null ; if (geometryWKTData != null){ queryValues = new String[]{columns, table, where, geometryWKTData.getValue()}; }else{ queryValues = new String[]{columns,table,where}; } } } try { data = queryExecutor.executeQuery(dataQueryID, queryValues); if (data != null && geometryWKT != null){ WKTReader wktReader = new WKTReader(); Geometry border = wktReader.read(geometryWKT); Iterator<Result> dataIt = data.iterator(); while (dataIt.hasNext()){ // Trim the Geometries using the // Geometry if on is available. Result current = dataIt.next(); String currentWKT = current.getString(0); Geometry currentGeometry = null; try { currentGeometry = wktReader.read(currentWKT); } catch (Exception e) { log.error("Error parsing Geometry "+ currentWKT); log.error(e,e); } if (currentGeometry != null){ Geometry newGeometry = currentGeometry.intersection(border); current.addColumnValue(0, newGeometry.toText()); } } } } catch (QueryException e) { log.error(e,e); } catch (ParseException e){ log.error(e,e); } } return data; } private String fetchColumns(String tableName){ String returnValue = null; try { String[] tables = tableName.toUpperCase().split(","); String[] filter = tables[0].split("\\."); // Only use the first Table the second one will be ignored. QueryExecutor queryExecutor = QueryExecutorFactory.getInstance() .getQueryExecutor(); Collection<Result> columnData = queryExecutor. executeQuery(this.columnQueryID, filter); if (columnData != null && !columnData.isEmpty()){ StringBuffer sb = new StringBuffer(); synchronized (sb) { Iterator<Result> it = columnData.iterator(); while(it.hasNext()){ Result current = it.next(); sb.append(current.getString(0)); if (it.hasNext()){ sb.append(" , "); } } } returnValue = sb.toString(); } } catch (QueryException e) { log.error(e,e); } return returnValue; } @Override public void setup(Node configuration) { log.debug("LayerOutputState.setup"); super.setup(configuration); this.dataQueryID = Config.getStringXPath(configuration, "queryID-layerdata"); this.geometryID = Config.getStringXPath(configuration, "inputvalue-geometry"); this.geometryQueryID = Config.getStringXPath(configuration, "queryID-geometry"); this.columnQueryID = "layer_colums"; //Config.getStringXPath(configuration, // "queryID-columns"); } protected String writeToShapeFile( String uuid, Collection<Result> data, CallContext callContext ) { File baseDir = shapefileDirectory(callContext); File shapeDir = new File(baseDir, uuid); boolean success = false; boolean createdDir = false; try { synchronized (shapeFileLock) { int count = 0; while (shapeDir.exists()) { shapeDir = new File(baseDir, uuid + "-" + count); ++count; } if (!shapeDir.mkdirs()) { log.error("cannot create directory '" + shapeDir.getAbsolutePath() + "'"); return null; } createdDir = true; } File shapeFile = new File(shapeDir, SHAPEFILE_NAME); if ((geometryType = ShapeFileWriter.writeDataToFile(shapeFile, "data", data)) == null){ log.error("writing data into shapefile failed"); return null; } shapeFilePath = shapeDir.getAbsolutePath(); success = true; callContext.afterCall(CallContext.STORE); return shapeFilePath; } finally { if (!success && createdDir) { FileUtils.deleteRecursive(shapeDir); } } } protected void writeZip( String uuid, CallContext callContext, OutputStream output, Collection<Result> data ) throws StateException { try { String p = getShapeFilePath(); if (p != null) { File dir = new File(p); if (dir.isDirectory()) { FileUtils.createZipArchive(dir, output); } } else { if ((p = writeToShapeFile(uuid, data, callContext)) != null) { FileUtils.createZipArchive(new File(p), output); } } } catch (IOException ioe) { log.error(ioe.getLocalizedMessage(), ioe); } } public String getShapeFilePath() { synchronized (shapeFileLock) { return shapeFilePath; } } private static File shapefileDirectory(CallContext callContext) { // TODO: Refactoring nessessary it should be used only one Shapefilepath // for alle Modes. Code was taken from HorizontalCrossSectionMeshOutputState GNVArtifactContext context = (GNVArtifactContext)callContext.globalContext(); File dir = (File)context.get( GNVArtifactContext.HORIZONTAL_CROSS_SECTION_RESULT_SHAPEFILE_PATH_KEY); return dir != null ? dir : GNVArtifactContext.DEFAULT_HORIZONTAL_CROSS_SECTION_PROFILE_SHAPEFILE_PATH; } /** * @see de.intevation.gnv.state.StateBase#endOfLife(java.lang.Object) */ @Override public void endOfLife(Object globalContext) { super.endOfLife(globalContext); // do it in background new Thread() { public void run() { // TODO: Do the un-publishing WMS stuff. String path = resetShapeFilePath(); if (path == null) { return; } File dir = new File(path); for (int i = 0; i < 10; ++i) { if (!dir.exists() || FileUtils.deleteRecursive(dir)) { MapfileGenerator.getInstance().update(); return; } try { Thread.sleep(10000L); } catch (InterruptedException ie) { } } log.error("failed to remove directory '" + path + "'"); } // run }.start(); } public String resetShapeFilePath() { synchronized (shapeFileLock) { String path = shapeFilePath; shapeFilePath = null; geometryType = null; templateID = null; return path; } } protected Document getWMS(String uuid, CallContext callContext, Collection<Result> data) throws StateException { // TODO: Do the real WMS publishing here! Document document = XMLUtils.newDocument(); Element pathElement = document.createElement("path"); document.appendChild(pathElement); String path = getShapeFilePath(); if (path != null && new File(path).isDirectory()) { pathElement.setTextContent(path); } else { if (data != null && (path = writeToShapeFile(uuid, data, callContext)) != null) { String paramType = LAYER_MODEL+"_"+templateID; if (!MapfileGenerator.getInstance().templateExists(paramType)){ // If the template doesn't exist the Defaulttemplates will be used. paramType = LAYER_MODEL+"_"+this.geometryType.toLowerCase(); } Document meta = MetaWriter.writeLayerMeta(callContext, uuid, path, paramType, this.determineGeometryType()); if (meta != null) { MapfileGenerator.getInstance().update(); return meta; } pathElement.setTextContent(path); } } return document; } private String determineGeometryType(){ String returnValue = this.geometryType.toLowerCase(); if (returnValue.equalsIgnoreCase("linestring")){ returnValue = "Line"; } return returnValue; } }