com.drillmap.crm.repository.extensions.invoker.CrudRepositoryInvoker.java Source code

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Here is the source code for com.drillmap.crm.repository.extensions.invoker.CrudRepositoryInvoker.java

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/*
 * Copyright 2013-2014 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.
 * You may obtain a copy of the License at
 *
 *      http://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 com.drillmap.crm.repository.extensions.invoker;

import java.io.Serializable;
import java.lang.reflect.Method;

import org.springframework.core.convert.ConversionService;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.repository.CrudRepository;
import org.springframework.data.repository.core.CrudMethods;
import org.springframework.data.repository.core.RepositoryInformation;

/**
 * {@link org.springframework.data.rest.core.invoke.RepositoryInvoker} to shortcut execution of CRUD methods into direct calls on a {@link CrudRepository}. Used
 * to avoid reflection overhead introduced by the base class if we know we work with a {@link CrudRepository}.
 * 
 * @author Oliver Gierke
 */
class CrudRepositoryInvoker extends ReflectionRepositoryInvoker {

    private final CrudRepository<Object, Serializable> repository;
    private final CrudMethods crudMethods;

    private final boolean customSaveMethod;
    private final boolean customFindOneMethod;
    private final boolean customDeleteMethod;

    /**
     * Creates a new {@link CrudRepositoryInvoker} for the given {@link CrudRepository}, {@link RepositoryInformation} and
     * {@link ConversionService}.
     * 
     * @param repository must not be {@literal null}.
     * @param information must not be {@literal null}.
     * @param conversionService must not be {@literal null}.
     */
    public CrudRepositoryInvoker(CrudRepository<Object, Serializable> repository, RepositoryInformation information,
            ConversionService conversionService) {

        super(repository, information, conversionService);
        this.repository = repository;
        this.crudMethods = information.getCrudMethods();

        this.customSaveMethod = isRedeclaredMethod(crudMethods.getSaveMethod());
        this.customFindOneMethod = isRedeclaredMethod(crudMethods.getFindOneMethod());
        this.customDeleteMethod = isRedeclaredMethod(crudMethods.getDeleteMethod());
    }

    /**
     * Invokes the method equivalent to {@link CrudRepository#findAll()}.
     * 
     * @return
     */
    protected Iterable<Object> invokeFindAll() {
        return repository.findAll();
    }

    /* 
     * (non-Javadoc)
     * @see org.springframework.data.rest.core.invoke.RepositoryInvoker#invokeFindAll(org.springframework.data.domain.Sort)
     */
    @Override
    public Iterable<Object> invokeFindAll(Sort pageable) {
        return repository.findAll();
    }

    /* 
     * (non-Javadoc)
     * @see org.springframework.data.rest.core.invoke.RepositoryInvoker#invokeFindAll(org.springframework.data.domain.Pageable)
     */
    @Override
    public Iterable<Object> invokeFindAll(Pageable pageable) {
        return repository.findAll();
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.rest.core.invoke.RepositoryInvoker#invokeFindOne(java.io.Serializable)
     */
    @Override
    @SuppressWarnings("unchecked")
    public <T> T invokeFindOne(Serializable id) {
        return customFindOneMethod ? super.<T>invokeFindOne(id) : (T) repository.findOne(convertId(id));
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.rest.core.invoke.ReflectionRepositoryInvoker#invokeSave(java.lang.Object)
     */
    @Override
    public <T> T invokeSave(T entity) {
        return customSaveMethod ? super.invokeSave(entity) : repository.save(entity);
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.rest.core.invoke.RepositoryInvoker#invokeDelete(java.io.Serializable)
     */
    @Override
    public void invokeDelete(Serializable id) {

        if (customDeleteMethod) {
            super.invokeDelete(id);
        } else {
            repository.delete(convertId(id));
        }
    }

    private boolean isRedeclaredMethod(Method method) {
        return !method.getDeclaringClass().equals(CrudRepository.class);
    }
}