/*
* 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.dialect;
import javax.persistence.GenerationType;
import org.seasar.extension.jdbc.SelectForUpdateType;
import org.seasar.framework.util.tiger.Pair;
/**
* Interbase用の方言をあつかうクラスです。
*
* @author higa
*
*/
public class InterbaseDialect extends StandardDialect {
@Override
public String getName() {
return "interbase";
}
@Override
public boolean supportsLimit() {
return true;
}
@Override
public String convertLimitSql(String sql, int offset, int limit) {
StringBuilder buf = new StringBuilder(sql.length() + 15);
buf.append(sql);
if (offset > 0) {
buf.append(" rows ");
buf.append(offset);
buf.append(" to ");
buf.append(limit);
} else {
buf.append(" rows ");
buf.append(limit);
}
return buf.toString();
}
@Override
public GenerationType getDefaultGenerationType() {
return GenerationType.SEQUENCE;
}
@Override
public boolean supportsSequence() {
return true;
}
@Override
public String getSequenceNextValString(final String sequenceName,
final int allocationSize) {
return "select RDB$GENERATOR_NAME from RDB$GENERATORS";
}
@Override
public boolean supportsForUpdate(final SelectForUpdateType type,
boolean withTarget) {
return type == SelectForUpdateType.NORMAL;
}
@Override
public String getForUpdateString(final SelectForUpdateType type,
final int waitSeconds, final Pair<String, String>... aliases) {
final StringBuilder buf = new StringBuilder(100);
if (aliases.length > 0) {
buf.append(" for update of ");
for (final Pair<String, String> alias : aliases) {
buf.append(alias.getFirst()).append('.').append(
alias.getSecond()).append(", ");
}
buf.setLength(buf.length() - 2);
}
buf.append(" with lock");
return new String(buf);
}
}