/**
* 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.metamodel.data;
import java.io.Closeable;
import java.util.Iterator;
import java.util.List;
import javax.swing.table.TableModel;
import org.apache.metamodel.query.SelectItem;
/**
* Represents a tabular DataSet where values are bound to columns and rows. A
* DataSet works similarly to a slightly modularized ResultSet when you traverse
* it - use the next() method to loop through the rows of the DataSet and use
* the getRow() method to get the current row.
*/
public interface DataSet extends Closeable, Iterable<Row> {
/**
* @return the SelectItems that represent the columns of this DataSet
*/
public SelectItem[] getSelectItems();
/**
* Finds the index of a given SelectItem
*
* @param item
* @return the index (0-based) of the SelectItem or -1 if the SelectItem
* doesn't exist in this DataSet.
*/
public int indexOf(SelectItem item);
/**
* Moves forward to the next row.
*
* @return true if there is a next row or false if not.
*/
public boolean next();
/**
* @return the current row.
*/
public Row getRow();
/**
* Closes the DataSet and any resources it may be holding.
*/
@Override
public void close();
/**
* Converts the DataSet into a TableModel (will load all values into memory).
*
* @deprecated instantiate a new {@link DataSetTableModel} instead.
*/
@Deprecated
public TableModel toTableModel();
/**
* Converts the DataSet into a list of object arrays (will load all values
* into memory)
*/
public List<Object[]> toObjectArrays();
/**
* Converts the DataSet into a list of rows (will load all rows into memory)
*/
public List<Row> toRows();
/**
* Converts the DataSet into an Iterator. Note that unlike many
* {@link Iterable} objects, {@link DataSet}s are unlikely to allow creation
* of multiple iterators without risking loss of data in each individual
* iteration loop.
*/
@Override
public Iterator<Row> iterator();
}