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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| package com.vividsolutions.jump.coordsys; | ||
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| import com.vividsolutions.jump.io.CompressedFile; | ||
| import com.vividsolutions.jump.workbench.JUMPWorkbench; | ||
| import com.vividsolutions.jump.workbench.Logger; | ||
| import org.apache.commons.compress.archivers.ArchiveException; | ||
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| import java.io.*; | ||
| import java.util.*; | ||
|
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| /** | ||
| * This class is used to find the precise Esri prj string for a given srid. | ||
| * | ||
| * Prj strings are taken from https://github.com/Esri/projection-engine-db-doc, | ||
| * licensed under the Apache License, Version 2.0 (the "License"). | ||
| * | ||
| * This class uses the two following files from the github repository : | ||
| * <ul> | ||
| * <li>/csv/pe_list_projcs.csv</li> | ||
| * <li>/csv/pe_list_geogcs.csv</li> | ||
| * </ul> | ||
| * The two files have been concatenated in a single file and zipped in a single file | ||
| * containing a single entry named pe_list_projcs_geogcs.csv. | ||
| * | ||
| * The file is not decompressed during installation process. Searching a prj from an id | ||
| * fast enough (< 1s including the decompression step). Once a prj has been searched, it | ||
| * is cached in a map and the second search takes no time. | ||
| * | ||
| * There is room for improvement : the Esri file contains also bounding boxes for each | ||
| * projection and the wkt2 version of its description. A reverse search function (from | ||
| * string to id) could be implemented). | ||
| */ | ||
| public class EsriProj { | ||
|
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| // A cache to remember already used projection string | ||
| public static Map<Integer,String> PROJMAP = new HashMap<>(); | ||
| // A cache to remember already used projection ids | ||
| public static Map<String,Integer> CODEMAP = new HashMap<>(); | ||
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| private static final File projfile = JUMPWorkbench.getInstance().getPlugInManager() | ||
| .findFileOrFolderInExtensionDirs("coord_ref_sys/pe_list_projcs_geogcs.zip"); | ||
| private static final String entryName = "pe_list_projcs_geogcs.csv"; | ||
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| public static void main(String[] args) throws IOException, ArchiveException { | ||
| System.out.println(findProj(2154)); | ||
| System.out.println(findProj(2154)); | ||
| } | ||
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| private static String[] tokenize(String line) { | ||
| List<String> tokens = new ArrayList<>(15); | ||
| boolean quoted = false; | ||
| StringBuilder sb = new StringBuilder(); | ||
| char[] array = line.toCharArray(); | ||
| for (int i = 0 ; i < array.length ; i++) { | ||
| char c = array[i]; | ||
| if (c == ',' && !quoted) { | ||
| tokens.add(sb.toString()); | ||
| sb.setLength(0); | ||
| } else if (c == ' ' && !quoted) { | ||
| // pass | ||
| } else if (c == '"' && array[i+1] != '"') { | ||
| quoted = !quoted; | ||
| } else { | ||
| sb.append(c); | ||
| if (c == '"' && array[i+1] != '"') i++; | ||
| } | ||
| } | ||
| tokens.add(sb.toString()); | ||
| return tokens.toArray(new String[0]); | ||
| } | ||
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| public static String findProj(final int id) throws IOException, ArchiveException { | ||
| //long t0 = System.currentTimeMillis(); | ||
| String proj = PROJMAP.get(id); | ||
| if (proj == null) proj = PROJMAP.get(id); | ||
| if (proj == null) { | ||
| //InputStream fis = new FileInputStream(projfile); | ||
| //InputStream is = CompressedFile.getUncompressedStream(fis, entryName); | ||
| InputStream is = CompressedFile.openFile(projfile.getPath(), entryName); | ||
| BufferedReader br = new BufferedReader(new InputStreamReader(is)); | ||
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| Optional<String[]> tokens = br.lines() | ||
| .map(EsriProj::tokenize) | ||
| .filter(it -> it[0].equals("" + id) || it[1].equals("" + id)) | ||
| .findFirst(); | ||
| if (tokens.isPresent()) { | ||
| String[] r = tokens.get(); | ||
| PROJMAP.put(id, r[4]); | ||
| proj = r[4]; | ||
| } | ||
| } | ||
| //System.out.println("found in " + (System.currentTimeMillis()-t0) + " ms"); | ||
| if (proj != null) | ||
| Logger.info("Found Esri prj file for srid " + id); | ||
| else | ||
| Logger.warn("No Esri prj file found for srid " + id); | ||
| return proj; | ||
| } | ||
|
|
||
| } |
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