org.apache.openjpa.jdbc.meta.strats.MaxEmbeddedClobFieldStrategy Maven / Gradle / Ivy
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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
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* KIND, either express or implied. See the License for the
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*/
package org.apache.openjpa.jdbc.meta.strats;
import java.sql.Clob;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.apache.openjpa.jdbc.kernel.JDBCStore;
import org.apache.openjpa.jdbc.sql.DBDictionary;
import org.apache.openjpa.jdbc.sql.Row;
import org.apache.openjpa.kernel.OpenJPAStateManager;
import org.apache.openjpa.lib.util.Localizer;
import org.apache.openjpa.meta.JavaTypes;
import org.apache.openjpa.util.MetaDataException;
/**
* Mapping for CLOB string on a dictionary that has a maximum embedded
* CLOB size.
*
* @author Abe White
* @nojavadoc
* @since 0.4.0
*/
public class MaxEmbeddedClobFieldStrategy
extends MaxEmbeddedLobFieldStrategy {
private static final Localizer _loc = Localizer.forPackage
(MaxEmbeddedClobFieldStrategy.class);
private int _maxSize = 0;
protected int getExpectedJavaType() {
return JavaTypes.STRING;
}
protected void update(OpenJPAStateManager sm, Row row)
throws SQLException {
String s = (String) getValue(sm);
if (s == null)
row.setNull(field.getColumns()[0], true);
else
row.setString(field.getColumns()[0], s);
}
protected Boolean isCustom(OpenJPAStateManager sm, JDBCStore store) {
String s = sm.fetchString(field.getIndex());
return (s != null && s.length() > _maxSize) ? null : Boolean.FALSE;
}
protected void putData(OpenJPAStateManager sm, ResultSet rs,
DBDictionary dict)
throws SQLException {
Clob clob = rs.getClob(1);
dict.putString(clob, sm.fetchString(field.getIndex()));
}
public void map(boolean adapt) {
if (field.getTypeCode() != JavaTypes.STRING)
throw new MetaDataException(_loc.get("not-clobstring", field));
super.map(adapt);
}
public void initialize() {
DBDictionary dict = field.getMappingRepository().getDBDictionary();
_maxSize = dict.maxEmbeddedClobSize;
}
protected Object getValue(OpenJPAStateManager sm) {
String s = sm.fetchString(field.getIndex());
if (s == null || (s.length() > _maxSize && !field.getColumns()[0].isNotNull())) {
return null;
}
return s;
}
}