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Refactored spatial index config settings to improve clarity
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110
...a/org/neo4j/kernel/impl/index/schema/config/ConfiguredSpaceFillingCurveSettingsCache.java
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| @@ -0,0 +1,110 @@ | ||
| /* | ||
| * Copyright (c) 2002-2018 "Neo4j," | ||
| * Neo4j Sweden AB [http://neo4j.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.kernel.impl.index.schema.config; | ||
|
|
||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
|
||
| import org.neo4j.configuration.ConfigValue; | ||
| import org.neo4j.kernel.configuration.Config; | ||
| import org.neo4j.kernel.impl.index.schema.config.SpaceFillingCurveSettingsFactory.EnvelopeSettings; | ||
| import org.neo4j.values.storable.CoordinateReferenceSystem; | ||
|
|
||
| /** | ||
| * These settings affect the creation of the 2D (or 3D) to 1D mapper. | ||
| * Changing these will change the values of the 1D mapping, and require re-indexing, so | ||
| * once data has been indexed, do not change these without recreating the index. | ||
| */ | ||
| public class ConfiguredSpaceFillingCurveSettingsCache | ||
| { | ||
| private int maxBits; | ||
| private HashMap<CoordinateReferenceSystem,SpaceFillingCurveSettings> settings = new HashMap<>(); | ||
| private static final String SPATIAL_SETTING_PREFIX = "unsupported.dbms.db.spatial.crs."; | ||
|
|
||
| public ConfiguredSpaceFillingCurveSettingsCache( Config config ) | ||
| { | ||
| this.maxBits = config.get( SpatialIndexSettings.space_filling_curve_max_bits ); | ||
| HashMap<CoordinateReferenceSystem,EnvelopeSettings> env = new HashMap<>(); | ||
| for ( Map.Entry<String,ConfigValue> entry : config.getConfigValues().entrySet() ) | ||
| { | ||
| String key = entry.getKey(); | ||
| String value = entry.getValue().toString(); | ||
| if ( key.startsWith( SPATIAL_SETTING_PREFIX ) ) | ||
| { | ||
| String[] fields = key.replace( SPATIAL_SETTING_PREFIX, "" ).split( "\\." ); | ||
| if ( fields.length != 3 ) | ||
| { | ||
| throw new IllegalArgumentException( | ||
| "Invalid spatial config settings, expected three fields after '" + SPATIAL_SETTING_PREFIX + "': " + key ); | ||
| } | ||
| else | ||
| { | ||
| CoordinateReferenceSystem crs = CoordinateReferenceSystem.byName( fields[0] ); | ||
| EnvelopeSettings envelopeSettings = env.computeIfAbsent( crs, EnvelopeSettings::new ); | ||
| int index = "xyz".indexOf( fields[1].toLowerCase() ); | ||
| if ( index < 0 ) | ||
| { | ||
| throw new IllegalArgumentException( "Invalid spatial coordinate key (should be one of 'x', 'y' or 'z'): " + fields[1] ); | ||
| } | ||
| if ( index >= crs.getDimension() ) | ||
| { | ||
| throw new IllegalArgumentException( "Invalid spatial coordinate key for " + crs.getDimension() + "D: " + fields[1] ); | ||
| } | ||
| switch ( fields[2].toLowerCase() ) | ||
| { | ||
| case "min": | ||
| envelopeSettings.min[index] = Double.parseDouble( value ); | ||
| break; | ||
| case "max": | ||
| envelopeSettings.max[index] = Double.parseDouble( value ); | ||
| break; | ||
| default: | ||
| throw new IllegalArgumentException( "Invalid spatial coordinate range key (should be one of 'max' or 'min'): " + fields[2] ); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| for ( Map.Entry<CoordinateReferenceSystem,EnvelopeSettings> entry : env.entrySet() ) | ||
| { | ||
| CoordinateReferenceSystem crs = entry.getKey(); | ||
| settings.put( crs, SpaceFillingCurveSettingsFactory.fromConfig( this.maxBits, entry.getValue() ) ); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * The space filling curve is configured up front to cover a specific region of 2D (or 3D) space, | ||
| * and the mapping tree is configured up front to have a specific maximum depth. These settings | ||
| * are stored in an instance of SpaceFillingCurveSettings and are determined by the Coordinate | ||
| * Reference System, and any neo4j.conf settings to override the CRS defaults. | ||
| * | ||
| * @return The default settings for the specified coordinate reference system | ||
| */ | ||
| public SpaceFillingCurveSettings forCRS( CoordinateReferenceSystem crs ) | ||
| { | ||
| if ( settings.containsKey( crs ) ) | ||
| { | ||
| return settings.get( crs ); | ||
| } | ||
| else | ||
| { | ||
| return SpaceFillingCurveSettingsFactory.fromConfig( maxBits, new EnvelopeSettings( crs ) ); | ||
| } | ||
| } | ||
| } |
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