| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.sis.internal.metadata; |
| |
| import java.util.Collections; |
| import org.opengis.util.RecordType; |
| import org.opengis.util.InternationalString; |
| import org.opengis.metadata.quality.PositionalAccuracy; |
| import org.opengis.metadata.quality.EvaluationMethodType; |
| import org.apache.sis.measure.Units; |
| import org.apache.sis.metadata.iso.quality.DefaultQuantitativeResult; |
| import org.apache.sis.metadata.iso.quality.DefaultAbsoluteExternalPositionalAccuracy; |
| import org.apache.sis.util.collection.WeakValueHashMap; |
| import org.apache.sis.util.iso.DefaultRecord; |
| import org.apache.sis.util.resources.Vocabulary; |
| import org.apache.sis.util.Static; |
| |
| |
| /** |
| * Creates a record reporting coordinate transformation accuracy. |
| * |
| * @author Martin Desruisseaux (Geomatys) |
| * @version 1.0 |
| * @since 0.7 |
| * @module |
| */ |
| public final class TransformationAccuracy extends Static { |
| /** |
| * The name for the transformation accuracy metadata. |
| */ |
| private static final InternationalString TRANSFORMATION_ACCURACY = |
| Vocabulary.formatInternational(Vocabulary.Keys.TransformationAccuracy); |
| |
| /** |
| * Cache the positional accuracies. Most coordinate operation use a small set of accuracy values. |
| */ |
| private static final WeakValueHashMap<Double,PositionalAccuracy> CACHE = new WeakValueHashMap<>(Double.class); |
| |
| /** |
| * Do not allow instantiation of this class. |
| */ |
| private TransformationAccuracy() { |
| } |
| |
| /** |
| * Creates a positional accuracy for the given value, in metres. |
| * This method may return a cached value. |
| * |
| * @param accuracy the accuracy in metres. |
| * @return a positional accuracy with the given value. |
| */ |
| public static PositionalAccuracy create(final Double accuracy) { |
| PositionalAccuracy p = CACHE.get(accuracy); |
| if (p == null) { |
| final RecordType type = RecordSchemaSIS.REAL; |
| final DefaultRecord record = new DefaultRecord(type); |
| record.setAll(accuracy); |
| |
| final DefaultQuantitativeResult result = new DefaultQuantitativeResult(); |
| result.setValues(Collections.singletonList(record)); |
| result.setValueUnit(Units.METRE); // In metres by definition in the EPSG database. |
| result.setValueType(type); |
| |
| final DefaultAbsoluteExternalPositionalAccuracy element = |
| new DefaultAbsoluteExternalPositionalAccuracy(result); |
| element.setNamesOfMeasure(Collections.singleton(TRANSFORMATION_ACCURACY)); |
| element.setEvaluationMethodType(EvaluationMethodType.DIRECT_EXTERNAL); |
| element.transition(DefaultAbsoluteExternalPositionalAccuracy.State.FINAL); |
| |
| p = CACHE.putIfAbsent(accuracy, element); |
| if (p == null) { |
| p = element; |
| } |
| } |
| return p; |
| } |
| } |