com.hazelcast.org.apache.calcite.avatica.util.RecordIteratorCursor 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 com.hazelcast.org.apache.calcite.avatica.util;
import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
/**
* Implementation of {@link com.hazelcast.org.apache.calcite.avatica.util.Cursor} on top of an
* {@link java.util.Iterator} that
* returns a record for each row. The record is a synthetic class whose fields
* are all public.
*
* @param Element type
*/
public class RecordIteratorCursor extends IteratorCursor {
private final List fields;
/**
* Creates a RecordIteratorCursor.
*
* @param iterator Iterator
* @param clazz Element type
* @deprecated Use {@link #RecordIteratorCursor(Iterator, Class, List)}
*/
@Deprecated // to be removed before 2.0
public RecordIteratorCursor(Iterator iterator, Class clazz) {
this(iterator, clazz, Arrays.asList(clazz.getFields()));
}
/**
* Creates a RecordIteratorCursor that projects particular fields.
*
* @param iterator Iterator
* @param clazz Element type
* @param fields Fields to project
*/
public RecordIteratorCursor(Iterator iterator, Class clazz,
List fields) {
super(iterator);
this.fields = fields;
}
protected Getter createGetter(int ordinal) {
return new FieldGetter(fields.get(ordinal));
}
}
// End RecordIteratorCursor.java