/*
* Copyright (C) 2017 Julien Viet
*
* 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 io.reactiverse.pgclient.impl;
import io.reactiverse.pgclient.PgIterator;
import io.reactiverse.pgclient.PgRowSet;
import io.reactiverse.pgclient.Row;
import java.util.NoSuchElementException;
import java.util.function.Function;
import java.util.stream.Collector;
class PgRowSetImpl extends PgResultBase<PgRowSet, PgRowSetImpl> implements PgRowSet {
static Collector<Row, PgRowSetImpl, PgRowSet> COLLECTOR = Collector.of(
PgRowSetImpl::new,
(set, row) -> {
if (set.head == null) {
set.head = set.tail = (RowImpl) row;
} else {
set.tail.next = (RowImpl) row;
set.tail = set.tail.next;
}
},
(set1, set2) -> null, // Shall not be invoked as this is sequential
(set) -> set
);
static Function<PgRowSet, PgRowSetImpl> FACTORY = rs -> (PgRowSetImpl) rs;
private RowImpl head;
private RowImpl tail;
@Override
public PgRowSet value() {
return this;
}
@Override
public PgIterator iterator() {
return new PgIterator() {
RowImpl current = head;
@Override
public boolean hasNext() {
return current != null;
}
@Override
public Row next() {
if (current == null) {
throw new NoSuchElementException();
}
RowImpl r = current;
current = current.next;
return r;
}
};
}
}