org.apache.jute.RecordReader Maven / Gradle / Ivy
/**
* 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.jute;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
/**
* Front-end interface to deserializers. Also acts as a factory
* for deserializers.
*
*/
public class RecordReader {
private InputArchive archive;
static private HashMap archiveFactory;
static {
archiveFactory = new HashMap();
Class[] params = { InputStream.class };
try {
archiveFactory.put("binary",
BinaryInputArchive.class.getDeclaredMethod(
"getArchive", params));
archiveFactory.put("csv",
CsvInputArchive.class.getDeclaredMethod(
"getArchive", params));
archiveFactory.put("xml",
XmlInputArchive.class.getDeclaredMethod(
"getArchive", params));
} catch (SecurityException ex) {
ex.printStackTrace();
} catch (NoSuchMethodException ex) {
ex.printStackTrace();
}
}
static private InputArchive createArchive(InputStream in, String format)
throws IOException {
Method factory = (Method) archiveFactory.get(format);
if (factory != null) {
Object[] params = { in };
try {
return (InputArchive) factory.invoke(null, params);
} catch (IllegalArgumentException ex) {
ex.printStackTrace();
} catch (InvocationTargetException ex) {
ex.printStackTrace();
} catch (IllegalAccessException ex) {
ex.printStackTrace();
}
}
return null;
}
/**
* Creates a new instance of RecordReader.
* @param in Stream from which to deserialize a record
* @param format Deserialization format ("binary", "xml", or "csv")
*/
public RecordReader(InputStream in, String format)
throws IOException {
archive = createArchive(in, format);
}
/**
* Deserialize a record
* @param r Record to be deserialized
*/
public void read(Record r) throws IOException {
r.deserialize(archive, "");
}
}