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Commit 1fd3741

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Daniel Gulyasreda-alaoui
Daniel Gulyas
authored andcommitted
Add fromAttributePaths helper method to EntityGraphUtils
1 parent 8c91188 commit 1fd3741

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‎README.md‎

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@@ -93,7 +93,18 @@ productRepository.findOne(1L, EntityGraphUtils.fromName("Product.brand"));
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Or any method you like.
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You can also pass a dynamically built EntityGraph by using `DynamicEntityGraph` implementation.
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You can also pass a dynamically built EntityGraph by using `DynamicEntityGraph`, it's also accessible through a helper method:
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```java
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productRepository.findOne(1L, EntityGraphUtils.fromAttributePaths("brand", "maker"));
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```
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This is similar to [Spring's ad-hoc attribute paths](http://docs.spring.io/spring-data/jpa/docs/current/reference/html/#repositories.query-methods.query-property-expressions),
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and equivalent to writing this in your repository's interface:
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```java
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@EntityGraph(attributePaths = { "brand", "maker" })
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Product findOne(Long id);
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```
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## Default EntityGraph
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‎src/main/java/com/cosium/spring/data/jpa/entity/graph/domain/EntityGraphUtils.java‎

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package com.cosium.spring.data.jpa.entity.graph.domain;
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import com.mysema.commons.lang.Assert;
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import java.util.Arrays;
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import java.util.List;
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/**
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return namedEntityGraph;
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}
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/**
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* @param attributePaths The attribute paths to be present in the result
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* @return A {@link DynamicEntityGraph} with the path attributes passed in as arguments.
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*/
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public static EntityGraph fromAttributePaths(String... attributePaths) {
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Assert.notEmpty(attributePaths, "At least one attribute path is required.");
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return new DynamicEntityGraph(Arrays.asList(attributePaths));
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}
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private static final class EmptyEntityGraph implements EntityGraph {
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@Override

‎src/test/java/com/cosium/spring/data/jpa/entity/graph/repository/JpaEntityGraphRepositoryTest.java‎

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import java.util.List;
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import com.cosium.spring.data.jpa.entity.graph.BaseTest;
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import com.cosium.spring.data.jpa.entity.graph.domain.EntityGraph;
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import com.cosium.spring.data.jpa.entity.graph.domain.EntityGraphUtils;
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import com.cosium.spring.data.jpa.entity.graph.repository.exception.InapplicableEntityGraphException;
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import com.cosium.spring.data.jpa.entity.graph.repository.sample.*;
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assertThat(Hibernate.isInitialized(product.getBrand())).isTrue();
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}
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@Transactional
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@Test
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public void given_brand_in_attribute_paths_eg_when_findone_then_brand_should_be_loaded() {
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Product product = productRepository.findOne(1L, EntityGraphUtils.fromAttributePaths(Product.BRAND_PROP_NAME));
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assertThat(product).isNotNull();
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assertThat(Hibernate.isInitialized(product.getBrand())).isTrue();
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}
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@Transactional
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@Test
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public void given_brand_and_maker_in_attribute_paths_eg_when_findone_then_brand_and_maker_should_be_loaded() {
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EntityGraph entityGraph = EntityGraphUtils.fromAttributePaths(Product.BRAND_PROP_NAME, Product.MAKER_PROP_NAME);
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Product product = productRepository.findOne(1L, entityGraph);
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assertThat(product).isNotNull();
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assertThat(Hibernate.isInitialized(product.getBrand())).isTrue();
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assertThat(Hibernate.isInitialized(product.getMaker())).isTrue();
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}
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@Transactional
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@Test
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public void given_brand_eg_when_findByName_then_brand_should_be_loaded(){

‎src/test/java/com/cosium/spring/data/jpa/entity/graph/repository/sample/Product.java‎

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public static final String DEFAULT_EG = "Product.default";
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public static final String BRAND_EG = "Product.brand";
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public static final String BRAND_PROP_NAME = "brand";
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public static final String MAKER_PROP_NAME = "maker";
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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@Access(value = AccessType.PROPERTY)

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