| /* |
| * 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.solr.common; |
| |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| |
| /** |
| * Interface to help do push writing to an array |
| */ |
| public interface IteratorWriter { |
| /** |
| * @param iw after this method returns , the ItemWriter Object is invalid |
| * Do not hold a reference to this object |
| */ |
| void writeIter(ItemWriter iw) throws IOException; |
| |
| interface ItemWriter { |
| /**The item could be any supported type |
| */ |
| ItemWriter add(Object o) throws IOException; |
| |
| default ItemWriter addNoEx(Object o) { |
| try { |
| add(o); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| return this; |
| } |
| |
| default ItemWriter add(int v) throws IOException { |
| add((Integer) v); |
| return this; |
| } |
| |
| |
| default ItemWriter add(long v) throws IOException { |
| add((Long) v); |
| return this; |
| } |
| |
| |
| default ItemWriter add(float v) throws IOException { |
| add((Float) v); |
| return this; |
| } |
| |
| default ItemWriter add(double v) throws IOException { |
| add((Double) v); |
| return this; |
| } |
| |
| default ItemWriter add(boolean v) throws IOException { |
| add((Boolean) v); |
| return this; |
| } |
| } |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| default List toList( List l) { |
| try { |
| writeIter(new ItemWriter() { |
| @Override |
| public ItemWriter add(Object o) throws IOException { |
| if (o instanceof MapWriter) o = ((MapWriter) o).toMap(new LinkedHashMap<>()); |
| if (o instanceof IteratorWriter) o = ((IteratorWriter) o).toList(new ArrayList<>()); |
| l.add(o); |
| return this; |
| } |
| }); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| return l; |
| } |
| } |