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Merge pull request #58 from ivoa/attrmaxgt1-27
publishing 0.5.7
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128
runtime/java/src/main/java/org/ivoa/vodml/jpa/AttributeConverters.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /* | ||
| * Created on 7 Oct 2024 | ||
| * Copyright 2024 Paul Harrison ([email protected]) | ||
| * | ||
| * Licensed 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 in file LICENSE | ||
| */ | ||
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| package org.ivoa.vodml.jpa; | ||
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| import java.util.ArrayList; | ||
| import java.util.Arrays; | ||
| import java.util.List; | ||
| import java.util.stream.Collectors; | ||
| import java.util.stream.Stream; | ||
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| import jakarta.persistence.AttributeConverter; | ||
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| /** | ||
| * Attribute converters to convert lists to comma separated strings. | ||
| * @author Paul Harrison ([email protected]) | ||
| */ | ||
| public class AttributeConverters { | ||
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| private static final String SPLIT_CHAR = ";"; | ||
| public static class StringListConverter implements AttributeConverter<List<String>, String> { | ||
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| /** | ||
| * {@inheritDoc} | ||
| * overrides @see jakarta.persistence.AttributeConverter#convertToDatabaseColumn(java.lang.Object) | ||
| */ | ||
| @Override | ||
| public String convertToDatabaseColumn(List<String> attribute) { | ||
| return attribute != null ? String.join(SPLIT_CHAR, attribute) : ""; | ||
| } | ||
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| /** | ||
| * {@inheritDoc} | ||
| * overrides @see jakarta.persistence.AttributeConverter#convertToEntityAttribute(java.lang.Object) | ||
| */ | ||
| @Override | ||
| public List<String> convertToEntityAttribute(String dbData) { | ||
| return dbData != null ? Arrays.asList(dbData.split(SPLIT_CHAR)) : new ArrayList<String>() ; | ||
| } | ||
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| } | ||
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| public static abstract class NumberListConverter <T> implements AttributeConverter<List<T>, String> { | ||
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| /** | ||
| * {@inheritDoc} | ||
| * overrides @see jakarta.persistence.AttributeConverter#convertToDatabaseColumn(java.lang.Object) | ||
| */ | ||
| @Override | ||
| public String convertToDatabaseColumn(List<T> attribute) { | ||
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| if(attribute!= null) | ||
| { | ||
| return attribute.stream().map(T::toString).collect(Collectors.joining (SPLIT_CHAR)); | ||
| } | ||
| else | ||
| { | ||
| return ""; | ||
| } | ||
| } | ||
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| } | ||
| public static class IntListConverter extends NumberListConverter<Integer> | ||
| { | ||
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| /** | ||
| * {@inheritDoc} | ||
| * overrides @see jakarta.persistence.AttributeConverter#convertToEntityAttribute(java.lang.Object) | ||
| */ | ||
| @Override | ||
| public List<Integer> convertToEntityAttribute(String dbData) { | ||
| if (dbData != null) | ||
| { | ||
| return Stream.of(dbData.split(SPLIT_CHAR)).map(Integer::parseInt).toList(); | ||
| } | ||
| else return new ArrayList<>(); | ||
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| } | ||
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| } | ||
| public static class DoubleListConverter extends NumberListConverter<Double> | ||
| { | ||
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| /** | ||
| * {@inheritDoc} | ||
| * overrides @see jakarta.persistence.AttributeConverter#convertToEntityAttribute(java.lang.Object) | ||
| */ | ||
| @Override | ||
| public List<Double> convertToEntityAttribute(String dbData) { | ||
| if (dbData != null) | ||
| { | ||
| return Stream.of(dbData.split(SPLIT_CHAR)).map(Double::parseDouble).toList(); | ||
| } | ||
| else return new ArrayList<>(); | ||
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| } | ||
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| } | ||
| public static class BooleanListConverter extends NumberListConverter<Boolean> | ||
| { | ||
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| /** | ||
| * {@inheritDoc} | ||
| * overrides @see jakarta.persistence.AttributeConverter#convertToEntityAttribute(java.lang.Object) | ||
| */ | ||
| @Override | ||
| public List<Boolean> convertToEntityAttribute(String dbData) { | ||
| if (dbData != null) | ||
| { | ||
| return Stream.of(dbData.split(SPLIT_CHAR)).map(Boolean::parseBoolean).toList(); | ||
| } | ||
| else return new ArrayList<>(); | ||
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| } | ||
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| } | ||
| } | ||
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