/* * Copyright 2017-2020 original authors * * 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 at * * https://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 io.micronaut.data.runtime.intercept; import io.micronaut.aop.MethodInvocationContext; import io.micronaut.core.beans.BeanProperty; import io.micronaut.core.convert.ConversionService; import io.micronaut.data.annotation.Query; import io.micronaut.data.intercept.DeleteOneInterceptor; import io.micronaut.data.intercept.RepositoryMethodKey; import io.micronaut.data.model.Embedded; import io.micronaut.data.model.runtime.BatchOperation; import io.micronaut.data.model.runtime.PreparedQuery; import io.micronaut.data.model.runtime.RuntimePersistentEntity; import io.micronaut.data.model.runtime.RuntimePersistentProperty; import io.micronaut.data.operations.RepositoryOperations; import edu.umd.cs.findbugs.annotations.NonNull; import java.util.Collections; /** * The default implementation of {@link DeleteOneInterceptor}. * @param <T> The declaring type * @author graemerocher * @since 1.0.0 */ public class DefaultDeleteOneInterceptor<T> extends AbstractQueryInterceptor<T, Object> implements DeleteOneInterceptor<T> { /** * Default constructor. * @param datastore The operations */ protected DefaultDeleteOneInterceptor(@NonNull RepositoryOperations datastore) { super(datastore); } @Override public Object intercept(RepositoryMethodKey methodKey, MethodInvocationContext<T, Object> context) { Object[] parameterValues = context.getParameterValues(); if (parameterValues.length == 1) { Object o = parameterValues[0]; if (context.hasAnnotation(Query.class)) { PreparedQuery<?, Number> preparedQuery = (PreparedQuery<?, Number>) prepareQuery(methodKey, context); final Class<?> rootEntity = preparedQuery.getRootEntity(); if (rootEntity.isInstance(o)) { final RuntimePersistentEntity<?> entity = operations.getEntity(rootEntity); final RuntimePersistentProperty<?> identity = entity.getIdentity(); if (identity != null) { if (identity instanceof Embedded) { final BeanProperty idProp = identity.getProperty(); final Object idValue = idProp.get(o); if (idValue == null) { throw new IllegalStateException("Cannot delete an entity with null ID: " + o); } preparedQuery.getParameterArray()[0] = idValue; } final Number result = operations.executeDelete(preparedQuery).orElse(0); final Class<Object> returnType = context.getReturnType().getType(); if (returnType.equals(rootEntity)) { if (result.longValue() > 0) { return o; } else { return null; } } else if (Number.class.isAssignableFrom(returnType)) { return ConversionService.SHARED.convertRequired(result, returnType); } else { return result; } } else { throw new IllegalStateException("Cannot delete an entity which defines no ID: " + rootEntity.getName()); } } else { if (o == null) { throw new IllegalArgumentException("Entity to delete cannot be null"); } else { throw new IllegalArgumentException("Entity argument must be an instance of " + rootEntity.getName()); } } } else { BatchOperation<Object> batchOperation = getBatchOperation(context, Collections.singletonList(o)); if (o != null) { operations.deleteAll(batchOperation); } else { throw new IllegalArgumentException("Entity to delete cannot be null"); } } } else { throw new IllegalStateException("Expected exactly one argument"); } return null; } }