/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* 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
* "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.apache.openjpa.jdbc.meta.strats;
import java.io.CharArrayReader;
import java.io.CharArrayWriter;
import java.io.IOException;
import java.io.Reader;
import org.apache.openjpa.jdbc.kernel.JDBCStore;
import org.apache.openjpa.jdbc.meta.JavaSQLTypes;
import org.apache.openjpa.jdbc.meta.ValueMapping;
import org.apache.openjpa.jdbc.schema.Column;
import org.apache.openjpa.jdbc.schema.ColumnIO;
import org.apache.openjpa.jdbc.sql.Sized;
import org.apache.openjpa.util.StoreException;
/**
* Handler for char array values.
*
* @nojavadoc
*/
public class CharArrayStreamValueHandler
extends AbstractValueHandler {
private static final CharArrayStreamValueHandler _instance =
new CharArrayStreamValueHandler();
/**
* Singleton instance.
*/
public static CharArrayStreamValueHandler getInstance() {
return _instance;
}
public Column[] map(ValueMapping vm, String name, ColumnIO io,
boolean adapt) {
Column col = new Column();
col.setName(name);
col.setJavaType(JavaSQLTypes.CHAR_STREAM);
col.setSize(-1);
return new Column[]{ col };
}
public Object toDataStoreValue(ValueMapping vm, Object val,
JDBCStore store) {
if (val == null)
return null;
char[] chars = PrimitiveWrapperArrays.toCharArray(val);
return new Sized(new CharArrayReader(chars), chars.length);
}
public Object toObjectValue(ValueMapping vm, Object val) {
if (val == null)
return null;
Reader reader = (Reader) val;
CharArrayWriter writer = new CharArrayWriter();
try {
for (int c; (c = reader.read()) != -1;)
writer.write(c);
} catch (IOException ioe) {
throw new StoreException(ioe);
}
return PrimitiveWrapperArrays.toObjectValue(vm, writer.toCharArray());
}
}