/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* 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 org.seasar.extension.jdbc.query;
import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.seasar.extension.jdbc.AutoUpdate;
import org.seasar.extension.jdbc.ConditionType;
import org.seasar.extension.jdbc.PropertyMeta;
import org.seasar.extension.jdbc.SetClause;
import org.seasar.extension.jdbc.WhereClause;
import org.seasar.extension.jdbc.manager.JdbcManagerImplementor;
import org.seasar.framework.util.FieldUtil;
import org.seasar.framework.util.IntegerConversionUtil;
import org.seasar.framework.util.LongConversionUtil;
import org.seasar.framework.util.tiger.CollectionsUtil;
/**
* {@link AutoUpdate}の実装クラスです。
*
* @author koichik
* @param <T>
* エンティティの型です。
*/
public class AutoUpdateImpl<T> extends AbstractAutoUpdate<T, AutoUpdate<T>>
implements AutoUpdate<T> {
/** UDPATE文 */
protected static final String UPDATE_STATEMENT = "update ";
/** バージョンプロパティを更新対象に含める場合<code>true</code> */
protected boolean includeVersion;
/** <code>null</code>値のプロパティを更新から除外する場合<code>true</code> */
protected boolean excludesNull;
/** 更新対象とするプロパティ */
protected final Set<String> includesProperties = CollectionsUtil
.newHashSet();
/** 更新から除外するプロパティ */
protected final Set<String> excludesProperties = CollectionsUtil
.newHashSet();
/** 更新前のプロパティの状態を持つ{@link Map} */
protected Map<String, Object> beforeStates;
/** 更新対象となるプロパティメタデータの{@link List} */
protected final List<PropertyMeta> targetProperties = CollectionsUtil
.newArrayList();
/** set句 */
protected final SetClause setClause = new SetClause();
/** where句 */
protected final WhereClause whereClause = new WhereClause();
/**
* @param jdbcManager
* 内部的なJDBCマネージャ
* @param entity
* エンティティ
*/
public AutoUpdateImpl(final JdbcManagerImplementor jdbcManager,
final T entity) {
super(jdbcManager, entity);
}
public AutoUpdate<T> includesVersion() {
includeVersion = true;
return this;
}
public AutoUpdate<T> excludesNull() {
excludesNull = true;
return this;
}
public AutoUpdate<T> includes(final CharSequence... propertyNames) {
includesProperties.addAll(Arrays.asList(toStringArray(propertyNames)));
return this;
}
public AutoUpdate<T> excludes(final CharSequence... propertyNames) {
excludesProperties.addAll(Arrays.asList(toStringArray(propertyNames)));
return this;
}
public AutoUpdate<T> changedFrom(final T beforeEntity) {
this.beforeStates = CollectionsUtil.newHashMap(entityMeta
.getPropertyMetaSize());
for (final PropertyMeta propertyMeta : entityMeta.getAllPropertyMeta()) {
final String propertyName = propertyMeta.getName();
final Object value = FieldUtil.get(propertyMeta.getField(),
beforeEntity);
this.beforeStates.put(propertyName, value);
}
return this;
}
public AutoUpdate<T> changedFrom(
final Map<String, ? extends Object> beforeStates) {
this.beforeStates = CollectionsUtil.newHashMap(beforeStates.size());
this.beforeStates.putAll(beforeStates);
return this;
}
public AutoUpdate<T> suppresOptimisticLockException() {
suppresOptimisticLockException = true;
return this;
}
@Override
protected void prepare(final String methodName) {
prepareCallerClassAndMethodName(methodName);
prepareTargetProperties();
prepareSetClause();
prepareWhereClause();
prepareParams();
prepareSql();
}
@Override
protected int executeInternal() {
if (targetProperties.isEmpty()) {
return 0;
}
return super.executeInternal();
}
/**
* set句に設定されるプロパティの準備をします。
*/
protected void prepareTargetProperties() {
for (final PropertyMeta propertyMeta : entityMeta
.getAllColumnPropertyMeta()) {
final String propertyName = propertyMeta.getName();
final Field field = propertyMeta.getField();
final Object value = FieldUtil.get(field, entity);
if (propertyMeta.isId()
|| !propertyMeta.getColumnMeta().isUpdatable()) {
continue;
}
if (propertyMeta.isVersion() && !includeVersion) {
continue;
}
if (!includesProperties.isEmpty()
&& !includesProperties.contains(propertyName)) {
continue;
}
if (excludesProperties.contains(propertyName)) {
continue;
}
if (excludesNull && value == null) {
continue;
}
if (beforeStates != null) {
final Object oldValue = beforeStates.get(propertyName);
if (value == oldValue) {
continue;
}
if (value != null && value.equals(oldValue)) {
continue;
}
}
targetProperties.add(propertyMeta);
}
}
/**
* set句の準備をします。
*/
protected void prepareSetClause() {
for (final PropertyMeta propertyMeta : targetProperties) {
setClause.addSql(propertyMeta.getColumnMeta().getName());
}
if (!includeVersion && entityMeta.hasVersionPropertyMeta()) {
final PropertyMeta propertyMeta = entityMeta
.getVersionPropertyMeta();
final String columnName = propertyMeta.getColumnMeta().getName();
setClause.addSql(columnName, columnName + " + 1");
}
}
/**
* where句の準備をします。
*/
protected void prepareWhereClause() {
for (final PropertyMeta propertyMeta : entityMeta
.getIdPropertyMetaList()) {
whereClause.addAndSql(ConditionType.EQ.getCondition(propertyMeta
.getColumnMeta().getName(), null));
}
if (!includeVersion && entityMeta.hasVersionPropertyMeta()) {
final PropertyMeta propertyMeta = entityMeta
.getVersionPropertyMeta();
whereClause.addAndSql(ConditionType.EQ.getCondition(propertyMeta
.getColumnMeta().getName(), null));
}
}
/**
* バインド変数を準備します．
*/
protected void prepareParams() {
for (final PropertyMeta propertyMeta : targetProperties) {
final Object value = FieldUtil.get(propertyMeta.getField(), entity);
addParam(value, propertyMeta);
}
for (final PropertyMeta propertyMeta : entityMeta
.getIdPropertyMetaList()) {
final Object value = FieldUtil.get(propertyMeta.getField(), entity);
addParam(value, propertyMeta);
}
if (!includeVersion && entityMeta.hasVersionPropertyMeta()) {
final PropertyMeta propertyMeta = entityMeta
.getVersionPropertyMeta();
final Object value = FieldUtil.get(propertyMeta.getField(), entity);
addParam(value, propertyMeta);
}
}
/**
* SQLに変換します。
*
* @return SQL
*/
@Override
protected String toSql() {
final String tableName = entityMeta.getTableMeta().getFullName();
final StringBuilder buf = new StringBuilder(UPDATE_STATEMENT.length()
+ tableName.length() + setClause.getLength()
+ whereClause.getLength());
return new String(buf.append(UPDATE_STATEMENT).append(tableName)
.append(setClause.toSql()).append(whereClause.toSql()));
}
@Override
protected boolean isOptimisticLock() {
return !includeVersion && entityMeta.hasVersionPropertyMeta();
}
@Override
protected void incrementVersion() {
if (includeVersion) {
return;
}
final Field field = entityMeta.getVersionPropertyMeta().getField();
if (field.getType() == int.class || field.getType() == Integer.class) {
final int version = IntegerConversionUtil.toPrimitiveInt(FieldUtil
.get(field, entity)) + 1;
FieldUtil.set(field, entity, Integer.valueOf(version));
} else if (field.getType() == long.class
|| field.getType() == Long.class) {
final long version = LongConversionUtil.toPrimitiveLong(FieldUtil
.get(field, entity)) + 1;
FieldUtil.set(field, entity, Long.valueOf(version));
}
}
}