jp.tricreo.ddd.base.lifecycle.impl.OnMemoryRepository.java Source code

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Here is the source code for jp.tricreo.ddd.base.lifecycle.impl.OnMemoryRepository.java

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/*
 * Copyright 2010 TRICREO, Inc. (http://tricreo.jp/)
 *
 * 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 jp.tricreo.ddd.base.lifecycle.impl;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import jp.tricreo.ddd.base.lifecycle.Repository;
import jp.tricreo.ddd.base.lifecycle.exception.EntityMultipleFoundRuntimeException;
import jp.tricreo.ddd.base.lifecycle.exception.EntityNotFoundRuntimeException;
import jp.tricreo.ddd.base.model.Entity;
import jp.tricreo.ddd.base.model.Identifier;

import com.google.common.base.Predicate;

import org.apache.commons.lang.Validate;

/**
 * ??
 *
 * @param <T> ?
 * @author j5ik2o
 */
public class OnMemoryRepository<T extends Entity> implements Repository<T>, Cloneable {

    private final Map<Identifier, T> entities = new HashMap<Identifier, T>();

    @Override
    @SuppressWarnings("unchecked")
    public List<T> asEntitiesList() {
        List<T> result = new ArrayList<T>(entities.size());
        for (T entity : entities.values()) {
            result.add((T) entity.clone());
        }
        return result;
    }

    @Override
    @SuppressWarnings("unchecked")
    public Set<T> asEntitiesSet() {
        Set<T> result = new HashSet<T>(entities.size());
        for (T entity : entities.values()) {
            result.add((T) entity.clone());
        }
        return result;
    }

    @Override
    @SuppressWarnings("unchecked")
    public OnMemoryRepository<T> clone() {
        try {
            return (OnMemoryRepository<T>) super.clone();
        } catch (CloneNotSupportedException e) {
            throw new Error("clone not supported");
        }
    }

    @Override
    public boolean contains(Identifier identifier) {
        Validate.notNull(identifier);
        return entities.containsKey(identifier);
    }

    @Override
    public boolean contains(Predicate<T> predicate) {
        Validate.notNull(predicate);
        for (T entity : entities.values()) {
            if (predicate.apply(entity)) {
                return true;
            }
        }
        return false;
    }

    @Override
    public boolean contains(T entity) {
        Validate.notNull(entity);
        return contains(entity.getIdentifier());
    }

    @Override
    public void delete(Identifier identifier) {
        Validate.notNull(identifier);
        entities.remove(identifier);
    }

    @Override
    public void delete(T entity) {
        Validate.notNull(entity);
        delete(entity.getIdentifier());
    }

    @Override
    @SuppressWarnings("unchecked")
    public T resolve(Identifier identifier) {
        Validate.notNull(identifier);
        if (contains(identifier) == false) {
            throw new EntityNotFoundRuntimeException();
        }
        return (T) entities.get(identifier).clone();
    }

    @Override
    public T resolve(Predicate<T> predicate) {
        Validate.notNull(predicate);
        T result = null;
        for (T entity : entities.values()) {
            if (predicate.apply(entity)) {
                if (result != null) {
                    throw new EntityMultipleFoundRuntimeException();
                }
                result = entity;
            }
        }
        if (result == null) {
            throw new EntityNotFoundRuntimeException();
        }
        return result;
    }

    @Override
    @SuppressWarnings("unchecked")
    public void store(T entity) {
        Validate.notNull(entity);
        entities.put(entity.getIdentifier(), (T) entity.clone());
    }
}