/*
* 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.where;
import java.util.Arrays;
import java.util.LinkedList;
import org.seasar.extension.jdbc.Where;
import org.seasar.framework.util.StringUtil;
import org.seasar.framework.util.tiger.CollectionsUtil;
/**
* 入力された項目をANDやORでつなげていくような検索条件を組み立てるクラスです。
*
* @author koichik
*/
public class ComplexWhere extends AbstractWhere<ComplexWhere> implements Where {
/** クライテリアを保持する文字列バッファのリスト */
protected LinkedList<StringBuilder> criteriaList = CollectionsUtil
.newLinkedList();
/**
* インスタンスを構築します。
*/
public ComplexWhere() {
criteriaList.add(criteriaSb);
}
/**
* これまでに追加された条件とこれから追加される条件をORで結合します。
*
* @return このインスタンス自身
*/
public ComplexWhere or() {
if (criteriaSb.length() > 0) {
criteriaSb = new StringBuilder(100);
criteriaList.addLast(criteriaSb);
}
return this;
}
/**
* これまでに追加された条件と、引数で渡された条件全体をANDで結合します。
*
* @param factor
* ANDで結合される条件
* @return このインスタンス自身
*/
public ComplexWhere and(final Where factor) {
final String factorCriteria = factor.getCriteria();
if (StringUtil.isEmpty(factorCriteria)) {
return this;
}
if (criteriaSb.length() > 0) {
criteriaSb.append(" and");
}
criteriaSb.append(" (").append(factorCriteria).append(")");
paramList.addAll(Arrays.asList(factor.getParams()));
propertyNameList.addAll(Arrays.asList(factor.getPropertyNames()));
return this;
}
@Override
public String getCriteria() {
if (criteriaSb.length() == 0) {
criteriaList.removeLast();
}
if (criteriaList.isEmpty()) {
return "";
}
if (criteriaList.size() == 1) {
return new String(criteriaList.getFirst());
}
int size = 0;
for (final StringBuilder buf : criteriaList) {
size += buf.length();
}
final StringBuilder buf = new StringBuilder(size + 50);
for (final StringBuilder criteria : criteriaList) {
buf.append("(").append(criteria).append(") or ");
}
buf.setLength(buf.length() - 4);
return new String(buf);
}
}