
org.databene.formats.util.OffsetDataSource Maven / Gradle / Ivy
/*
* Copyright (C) 2011-2014 Volker Bergmann ([email protected]).
* All rights reserved.
*
* 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.databene.formats.util;
import org.databene.formats.DataContainer;
import org.databene.formats.DataIterator;
import org.databene.formats.DataSource;
/**
* {@link DataSource} proxy which provides a subset of the source's data defined by an offset.
* Created: 24.07.2011 09:59:24
* @since 0.6.0
* @author Volker Bergmann
*/
public class OffsetDataSource extends DataSourceProxy {
protected int offset;
public OffsetDataSource(DataSource source, int offset) {
super(source);
this.offset = offset;
}
@Override
public DataIterator iterator() {
DataContainer container = new DataContainer();
DataIterator result = super.iterator();
for (int i = 0; i < offset; i++)
result.next(container);
return result;
}
@Override
public String toString() {
return getClass().getSimpleName() + '[' + offset + ", " + source + ']';
}
}
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