Spring/spring-data-keyvalue
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

DATAKV-121 - Added support for projections on repository query methods.

Browse Source 
Repository methods can now return interfaces that act as projections on the original entity instances stored in the repository.

Related ticket: DATACMNS-89.
This commit is contained in:
Oliver Gierke
2015-12-14 18:29:26 +01:00
parent e7efe2912c
commit d1df6d5e76
6 changed files with 103 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
src/main/java/org/springframework/data/keyvalue/repository/query/KeyValuePartTreeQuery.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2014 the original author or authors.
* Copyright 2014-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import java.lang.reflect.Constructor;
import org.springframework.beans.BeanUtils;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.keyvalue.core.IterableConverter;
import org.springframework.data.keyvalue.core.KeyValueOperations;
import org.springframework.data.keyvalue.core.query.KeyValueQuery;
@@ -28,10 +29,12 @@ import org.springframework.data.repository.query.ParameterAccessor;
import org.springframework.data.repository.query.ParametersParameterAccessor;
import org.springframework.data.repository.query.QueryMethod;
import org.springframework.data.repository.query.RepositoryQuery;
import org.springframework.data.repository.query.ResultProcessor;
import org.springframework.data.repository.query.parser.AbstractQueryCreator;
import org.springframework.data.repository.query.parser.PartTree;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.spel.standard.SpelExpression;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
/**
@@ -50,25 +53,58 @@ public class KeyValuePartTreeQuery implements RepositoryQuery {
private KeyValueQuery<?> query;
public KeyValuePartTreeQuery(QueryMethod queryMethod, EvaluationContextProvider evalContextProvider,
/**
* Creates a new {@link KeyValuePartTreeQuery} for the given {@link QueryMethod}, {@link EvaluationContextProvider},
* {@link KeyValueOperations} and query creator type.
*
* @param queryMethod must not be {@literal null}.
* @param evaluationContextProvider must not be {@literal null}.
* @param keyValueOperations must not be {@literal null}.
* @param queryCreator must not be {@literal null}.
*/
public KeyValuePartTreeQuery(QueryMethod queryMethod, EvaluationContextProvider evaluationContextProvider,
KeyValueOperations keyValueOperations, Class<? extends AbstractQueryCreator<?, ?>> queryCreator) {
Assert.notNull(queryMethod, "Query method must not be null!");
Assert.notNull(evaluationContextProvider, "EvaluationContextprovider must not be null!");
Assert.notNull(keyValueOperations, "KeyValueOperations must not be null!");
Assert.notNull(queryCreator, "QueryCreator type must not be null!");
this.queryMethod = queryMethod;
this.keyValueOperations = keyValueOperations;
this.evaluationContextProvider = evalContextProvider;
this.evaluationContextProvider = evaluationContextProvider;
this.queryCreator = queryCreator;
}
/*
* (non-Javadoc)
* @see org.springframework.data.repository.query.RepositoryQuery#getQueryMethod()
*/
@Override
public QueryMethod getQueryMethod() {
return queryMethod;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
/*
* (non-Javadoc)
* @see org.springframework.data.repository.query.RepositoryQuery#execute(java.lang.Object[])
*/
@Override
public Object execute(Object[] parameters) {
KeyValueQuery<?> query = prepareQuery(parameters);
ParameterAccessor accessor = new ParametersParameterAccessor(getQueryMethod().getParameters(), parameters);
KeyValueQuery<?> query = prepareQuery(parameters, accessor);
ResultProcessor processor = queryMethod.getResultProcessor().withDynamicProjection(accessor);
return processor.processResult(doExecute(parameters, query));
}
/**
* @param parameters
* @param query
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
protected Object doExecute(Object[] parameters, KeyValueQuery<?> query) {
if (queryMethod.isPageQuery() || queryMethod.isSliceQuery()) {
@@ -78,8 +114,8 @@ public class KeyValuePartTreeQuery implements RepositoryQuery {
Iterable<?> result = this.keyValueOperations.find(query, queryMethod.getEntityInformation().getJavaType());
long count = queryMethod.isSliceQuery() ? 0 : keyValueOperations.count(query, queryMethod.getEntityInformation()
.getJavaType());
long count = queryMethod.isSliceQuery() ? 0
: keyValueOperations.count(query, queryMethod.getEntityInformation().getJavaType());
return new PageImpl(IterableConverter.toList(result), page, count);
@@ -91,16 +127,13 @@ public class KeyValuePartTreeQuery implements RepositoryQuery {
Iterable<?> result = this.keyValueOperations.find(query, queryMethod.getEntityInformation().getJavaType());
return result.iterator().hasNext() ? result.iterator().next() : null;
}
throw new UnsupportedOperationException("Query method not supported.");
}
@SuppressWarnings({ "rawtypes", "unchecked" })
private KeyValueQuery<?> prepareQuery(Object[] parameters) {
ParametersParameterAccessor accessor = new ParametersParameterAccessor(getQueryMethod().getParameters(), parameters);
private KeyValueQuery<?> prepareQuery(Object[] parameters, ParameterAccessor accessor) {
if (this.query == null) {
this.query = createQuery(accessor);
@@ -116,11 +149,9 @@ public class KeyValuePartTreeQuery implements RepositoryQuery {
q.setRows(-1);
}
if (accessor.getSort() != null) {
q.setSort(accessor.getSort());
} else {
q.setSort(this.query.getSort());
}
Sort sort = accessor.getSort();
q.setSort(sort != null ? sort : query.getSort());
if (q.getCritieria() instanceof SpelExpression) {
EvaluationContext context = this.evaluationContextProvider.getEvaluationContext(getQueryMethod().getParameters(),
@@ -131,7 +162,7 @@ public class KeyValuePartTreeQuery implements RepositoryQuery {
return q;
}
public KeyValueQuery<?> createQuery(ParametersParameterAccessor accessor) {
public KeyValueQuery<?> createQuery(ParameterAccessor accessor) {
PartTree tree = new PartTree(getQueryMethod().getName(), getQueryMethod().getEntityInformation().getJavaType());

11
src/main/java/org/springframework/data/keyvalue/repository/support/KeyValueRepositoryFactory.java
View File

@@ -25,6 +25,7 @@ import org.springframework.data.keyvalue.repository.query.KeyValuePartTreeQuery;
import org.springframework.data.keyvalue.repository.query.SpelQueryCreator;
import org.springframework.data.mapping.PersistentEntity;
import org.springframework.data.mapping.context.MappingContext;
import org.springframework.data.projection.ProjectionFactory;
import org.springframework.data.querydsl.QueryDslPredicateExecutor;
import org.springframework.data.repository.core.EntityInformation;
import org.springframework.data.repository.core.NamedQueries;
@@ -170,13 +171,15 @@ public class KeyValueRepositoryFactory extends RepositoryFactorySupport {
this.queryCreator = queryCreator;
}
/*
/*
* (non-Javadoc)
* @see org.springframework.data.repository.query.QueryLookupStrategy#resolveQuery(java.lang.reflect.Method, org.springframework.data.repository.core.RepositoryMetadata, org.springframework.data.repository.core.NamedQueries)
* @see org.springframework.data.repository.query.QueryLookupStrategy#resolveQuery(java.lang.reflect.Method, org.springframework.data.repository.core.RepositoryMetadata, org.springframework.data.projection.ProjectionFactory, org.springframework.data.repository.core.NamedQueries)
*/
public RepositoryQuery resolveQuery(Method method, RepositoryMetadata metadata, NamedQueries namedQueries) {
@Override
public RepositoryQuery resolveQuery(Method method, RepositoryMetadata metadata, ProjectionFactory factory,
NamedQueries namedQueries) {
QueryMethod queryMethod = new QueryMethod(method, metadata);
QueryMethod queryMethod = new QueryMethod(method, metadata, factory);
return new KeyValuePartTreeQuery(queryMethod, evaluationContextProvider, this.keyValueOperations,
this.queryCreator);
}