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Merge pull request #39 from sjaakd/entity-with-key
lookup-entity-with-id
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‎README.md‎

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* _mapstruct-protobuf3_: Example on how to use protobuf3 with MapStruct
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* _mapstruct-kotlin_: Example on how to use MapStruct with Kotlin using KAPT (Kotlin Annotation Processing Tool)
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* _mapstruct-jpa-parent-child_: Example on how to use @Context in relation to parent / child relations in JPA)
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* _mapstruct-lookup-entity-with-composed-key_: Shows how an object with composite key can be read from the database in a mapping method.
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## License
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‎mapstruct-lookup-entity-with-id/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Copyright 2012-2017 Gunnar Morling (http://www.gunnarmorling.de/)
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and/or other contributors as indicated by the @authors tag. See the
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copyright.txt file in the distribution for a full listing of all
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contributors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>org.mapstruct.examples.iterable</groupId>
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<artifactId>mapstruct-lookup-entity-with-composed-key</artifactId>
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<version>1.0-SNAPSHOT</version>
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<properties>
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<org.mapstruct.version>1.2.0.Final</org.mapstruct.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>javax.persistence</groupId>
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<artifactId>persistence-api</artifactId>
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<version>1.0</version>
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</dependency>
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<dependency>
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<groupId>org.mapstruct</groupId>
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<artifactId>mapstruct-jdk8</artifactId>
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<version>${org.mapstruct.version}</version>
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</dependency>
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<dependency>
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<groupId>org.mapstruct</groupId>
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<artifactId>mapstruct-processor</artifactId>
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<version>${org.mapstruct.version}</version>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
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<version>3.9.0</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.6.2</version>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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<annotationProcessorPaths>
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<path>
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<groupId>org.mapstruct</groupId>
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<artifactId>mapstruct-processor</artifactId>
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<version>${org.mapstruct.version}</version>
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</path>
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</annotationProcessorPaths>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎mapstruct-lookup-entity-with-id/src/main/java/org/mapstruct/jpa/ArticleRepository.java‎

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/**
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* Copyright 2012-2017 Gunnar Morling (http://www.gunnarmorling.de/)
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* and/or other contributors as indicated by the @authors tag. See the
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* copyright.txt file in the distribution for a full listing of all
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* contributors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.mapstruct.jpa;
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/**
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*
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* @author Sjaak Derksen
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*/
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public class ArticleRepository {
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public CombinedOfferingEntity lookup(ComposedKey key) {
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// do some DB lookups here.
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CombinedOfferingEntity entity = new CombinedOfferingEntity();
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entity.setKey( key );
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return entity;
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}
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}

‎mapstruct-lookup-entity-with-id/src/main/java/org/mapstruct/jpa/CombinedOfferingEntity.java‎

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/**
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* Copyright 2012-2017 Gunnar Morling (http://www.gunnarmorling.de/)
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* and/or other contributors as indicated by the @authors tag. See the
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* copyright.txt file in the distribution for a full listing of all
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* contributors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.mapstruct.jpa;
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/**
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*
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* @author Sjaak Derksen
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*/
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public class CombinedOfferingEntity implements Entity {
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private ComposedKey key;
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private String descriptionArticle1;
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private String descriptionArticle2;
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@Override
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public ComposedKey getKey() {
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return key;
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}
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public void setKey(ComposedKey key) {
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this.key = key;
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}
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public String getDescriptionArticle1() {
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return descriptionArticle1;
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}
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public void setDescriptionArticle1(String descriptionArticle1) {
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this.descriptionArticle1 = descriptionArticle1;
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}
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public String getDescriptionArticle2() {
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return descriptionArticle2;
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}
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public void setDescriptionArticle2(String descriptionArticle2) {
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this.descriptionArticle2 = descriptionArticle2;
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}
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}

‎mapstruct-lookup-entity-with-id/src/main/java/org/mapstruct/jpa/ComposedKey.java‎

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/**
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* Copyright 2012-2017 Gunnar Morling (http://www.gunnarmorling.de/)
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* and/or other contributors as indicated by the @authors tag. See the
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* copyright.txt file in the distribution for a full listing of all
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* contributors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.mapstruct.jpa;
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/**
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*
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* @author Sjaak Derksen
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*/
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public class ComposedKey {
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private final String name1;
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private final String name2;
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public ComposedKey(String name1, String name2) {
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this.name1 = name1;
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this.name2 = name2;
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}
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public String getName1() {
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return name1;
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}
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public String getName2() {
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return name2;
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}
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}

‎mapstruct-lookup-entity-with-id/src/main/java/org/mapstruct/jpa/Entity.java‎

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/**
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* Copyright 2012-2017 Gunnar Morling (http://www.gunnarmorling.de/)
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* and/or other contributors as indicated by the @authors tag. See the
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* copyright.txt file in the distribution for a full listing of all
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* contributors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.mapstruct.jpa;
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/**
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*
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* @author Sjaak Derksen
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*/
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public interface Entity {
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ComposedKey getKey();
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}

‎mapstruct-lookup-entity-with-id/src/main/java/org/mapstruct/jpa/SourceTargetMapper.java‎

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/**
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* Copyright 2012-2017 Gunnar Morling (http://www.gunnarmorling.de/)
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* and/or other contributors as indicated by the @authors tag. See the
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* copyright.txt file in the distribution for a full listing of all
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* contributors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.mapstruct.jpa;
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import org.mapstruct.Context;
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import org.mapstruct.Mapper;
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import org.mapstruct.Mapping;
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import org.mapstruct.ObjectFactory;
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import org.mapstruct.TargetType;
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import org.mapstruct.factory.Mappers;
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@Mapper
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public interface SourceTargetMapper {
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SourceTargetMapper MAPPER = Mappers.getMapper( SourceTargetMapper.class );
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@Mapping( target = "key", ignore = true )
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@Mapping( target = "descriptionArticle1", source = "brush.description" )
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@Mapping( target = "descriptionArticle2", source = "paste.description" )
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CombinedOfferingEntity toEntity(Toothbrush brush, ToothPaste paste, @Context ArticleRepository repo);
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@ObjectFactory
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default <T extends Entity> T lookup(Toothbrush brush, ToothPaste paste, @Context ArticleRepository repo,
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@TargetType Class<T> targetType ) {
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ComposedKey key = new ComposedKey(brush.getName(), paste.getName() );
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CombinedOfferingEntity entity = repo.lookup( key );
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if ( entity == null ) {
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entity = new CombinedOfferingEntity();
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}
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return (T) entity;
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}
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}

‎mapstruct-lookup-entity-with-id/src/main/java/org/mapstruct/jpa/ToothPaste.java‎

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/**
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* Copyright 2012-2017 Gunnar Morling (http://www.gunnarmorling.de/)
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* and/or other contributors as indicated by the @authors tag. See the
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* copyright.txt file in the distribution for a full listing of all
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* contributors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.mapstruct.jpa;
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/**
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*
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* @author Sjaak Derksen
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*/
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public class ToothPaste {
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private String name;
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private String description;
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getDescription() {
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return description;
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}
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public void setDescription(String description) {
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this.description = description;
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}
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}

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