Mapsforge: simplification exceptions (#906)

docs/Changelog.md

@@ -4,6 +4,8 @@
 
 - Mapsforge: deduplicate maps [#903](https://github.com/mapsforge/vtm/pull/903)
 - Fix overlapping map regions [#903](https://github.com/mapsforge/vtm/pull/903) [#905](https://github.com/mapsforge/vtm/pull/905)
+- Mapsforge: simplification exceptions [#906](https://github.com/mapsforge/vtm/pull/906)
+  - `Parameters.SIMPLIFICATION_EXCEPTIONS`
 - Minor improvements and bug fixes
 - [Solved issues](https://github.com/mapsforge/vtm/issues?q=is%3Aclosed+milestone%3A0.18.0)
 

vtm/src/org/oscim/core/TagSet.java

@@ -1,7 +1,7 @@
 /*
  * Copyright 2013 Hannes Janetzek
  * Copyright 2016 Andrey Novikov
- * Copyright 2016 devemux86
+ * Copyright 2016-2022 devemux86
  * Copyright 2017-2019 Gustl22
  *
  * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
@@ -22,6 +22,7 @@ package org.oscim.core;
 import org.oscim.utils.Utils;
 
 import java.util.Arrays;
+import java.util.Collection;
 
 /**
  * The Class TagSet holds a set of Tags.
@@ -219,6 +220,20 @@ public class TagSet {
         return false;
     }
 
+    /**
+     * Checks if any tag is contained in TagSet.
+     *
+     * @param tags the tags
+     * @return true, iff any tag is in TagSet
+     */
+    public boolean contains(Collection<Tag> tags) {
+        for (Tag tag : tags) {
+            if (contains(tag))
+                return true;
+        }
+        return false;
+    }
+
     @Override
     public String toString() {
         StringBuilder sb = new StringBuilder();

vtm/src/org/oscim/tiling/source/mapfile/MapDatabase.java

@@ -836,6 +836,7 @@ public class MapDatabase implements ITileDataSource {
                     || e.tags.contains(TAG_ISSEA)
                     || e.tags.contains(TAG_SEA)
                     || e.tags.contains(TAG_NOSEA)
+                    || e.tags.contains(Parameters.SIMPLIFICATION_EXCEPTIONS)
                     || deltaLon > minDeltaLon || deltaLon < -minDeltaLon
                     || deltaLat > minDeltaLat || deltaLat < -minDeltaLat)) {
                 // Point reduction except lines and land/sea polygons

vtm/src/org/oscim/utils/Parameters.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2020 devemux86
+ * Copyright 2017-2022 devemux86
  *
  * This program is free software: you can redistribute it and/or modify it under the
  * terms of the GNU Lesser General Public License as published by the Free Software
@@ -14,6 +14,11 @@
  */
 package org.oscim.utils;
 
+import org.oscim.core.Tag;
+
+import java.util.HashSet;
+import java.util.Set;
+
 public final class Parameters {
 
     public enum SymbolScaling {ALL, POI}
@@ -74,6 +79,11 @@ public final class Parameters {
      */
     public static boolean POT_TEXTURES = false;
 
+    /**
+     * Simplification exceptions.
+     */
+    public static final Set<Tag> SIMPLIFICATION_EXCEPTIONS = new HashSet<>();
+
     /**
      * Reduce points on-the-fly while reading from map files.
      * e.g. 0 (no simplification), 2, 4, ...