Make planetiler-openmaptiles runnable as a standalone project (#19)

src/main/java/org/openmaptiles/layers/AerodromeLabel.java

@@ -0,0 +1,83 @@
+/*
+Copyright (c) 2021, MapTiler.com & OpenMapTiles contributors.
+All rights reserved.
+
+Code license: BSD 3-Clause License
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of the copyright holder nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Design license: CC-BY 4.0
+
+See https://github.com/openmaptiles/openmaptiles/blob/master/LICENSE.md for details on usage
+ */
+package org.openmaptiles.layers;
+
+import static org.openmaptiles.util.Utils.nullIfEmpty;
+import static org.openmaptiles.util.Utils.nullOrEmpty;
+
+import com.onthegomap.planetiler.FeatureCollector;
+import com.onthegomap.planetiler.config.PlanetilerConfig;
+import com.onthegomap.planetiler.expression.MultiExpression;
+import com.onthegomap.planetiler.stats.Stats;
+import com.onthegomap.planetiler.util.Translations;
+import org.openmaptiles.generated.OpenMapTilesSchema;
+import org.openmaptiles.generated.Tables;
+import org.openmaptiles.util.OmtLanguageUtils;
+import org.openmaptiles.util.Utils;
+
+/**
+ * Defines the logic for generating map elements in the {@code aerodrome_label} layer from source features.
+ * <p>
+ * This class is ported to Java from
+ * <a href="https://github.com/openmaptiles/openmaptiles/tree/master/layers/aerodrome_label">OpenMapTiles
+ * aerodrome_layer sql files</a>.
+ */
+public class AerodromeLabel implements
+  OpenMapTilesSchema.AerodromeLabel,
+  Tables.OsmAerodromeLabelPoint.Handler {
+
+  private final MultiExpression.Index<String> classLookup;
+  private final Translations translations;
+
+  public AerodromeLabel(Translations translations, PlanetilerConfig config, Stats stats) {
+    this.classLookup = FieldMappings.Class.index();
+    this.translations = translations;
+  }
+
+  @Override
+  public void process(Tables.OsmAerodromeLabelPoint element, FeatureCollector features) {
+    String clazz = classLookup.getOrElse(element.source(), FieldValues.CLASS_OTHER);
+    boolean important = !nullOrEmpty(element.iata()) && FieldValues.CLASS_INTERNATIONAL.equals(clazz);
+    features.centroid(LAYER_NAME)
+      .setBufferPixels(BUFFER_SIZE)
+      .setMinZoom(important ? 8 : 10)
+      .putAttrs(OmtLanguageUtils.getNames(element.source().tags(), translations))
+      .putAttrs(Utils.elevationTags(element.ele()))
+      .setAttr(Fields.IATA, nullIfEmpty(element.iata()))
+      .setAttr(Fields.ICAO, nullIfEmpty(element.icao()))
+      .setAttr(Fields.CLASS, clazz);
+  }
+}