org.apache.openjpa.jdbc.meta.strats.MaxEmbeddedByteArrayFieldStrategy Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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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
* specific language governing permissions and limitations
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*/
package org.apache.openjpa.jdbc.meta.strats;
import java.lang.reflect.Array;
import java.sql.Blob;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.apache.openjpa.jdbc.kernel.JDBCStore;
import org.apache.openjpa.jdbc.meta.JavaSQLTypes;
import org.apache.openjpa.jdbc.schema.Column;
import org.apache.openjpa.jdbc.sql.DBDictionary;
import org.apache.openjpa.jdbc.sql.Joins;
import org.apache.openjpa.jdbc.sql.Result;
import org.apache.openjpa.jdbc.sql.Row;
import org.apache.openjpa.kernel.OpenJPAStateManager;
import org.apache.openjpa.lib.util.Localizer;
import org.apache.openjpa.util.MetaDataException;
/**
* Mapping for byte array fields on a dictionary that has a maximum embedded
* BLOB size.
*
* @author Abe White
* @nojavadoc
* @since 0.4.0
*/
public class MaxEmbeddedByteArrayFieldStrategy
extends MaxEmbeddedLobFieldStrategy {
private static final Localizer _loc = Localizer.forPackage
(MaxEmbeddedByteArrayFieldStrategy.class);
private int _maxSize = 0;
protected int getExpectedJavaType() {
return JavaSQLTypes.BYTES;
}
protected void update(OpenJPAStateManager sm, Row row)
throws SQLException {
byte[] b = (byte[]) getValue(sm);
if (b == null)
row.setBytes(field.getColumns()[0], null);
else
row.setBytes(field.getColumns()[0], b);
}
protected Boolean isCustom(OpenJPAStateManager sm, JDBCStore store) {
Object val = sm.fetchObject(field.getIndex());
return (val != null && Array.getLength(val) > _maxSize) ? null
: Boolean.FALSE;
}
protected void putData(OpenJPAStateManager sm, ResultSet rs,
DBDictionary dict)
throws SQLException {
Blob blob = rs.getBlob(1);
dict.putBytes(blob, PrimitiveWrapperArrays.toByteArray(sm.fetchObject
(field.getIndex())));
}
protected Object load(Column col, Result res, Joins joins)
throws SQLException {
return PrimitiveWrapperArrays.toObjectValue(field,
res.getBytes(col, joins));
}
public void map(boolean adapt) {
if (field.getType() != byte[].class && field.getType() != Byte[].class)
throw new MetaDataException(_loc.get("not-bytes", field));
super.map(adapt);
}
public void initialize() {
DBDictionary dict = field.getMappingRepository().getDBDictionary();
_maxSize = dict.maxEmbeddedBlobSize;
}
protected Object getValue(OpenJPAStateManager sm) {
byte[] b = PrimitiveWrapperArrays.toByteArray(sm.fetchObject
(field.getIndex()));
if (b == null || (b.length > _maxSize && !field.getColumns()[0].isNotNull()))
return null;
return b;
}
}