001/** 002 * Copyright (C) 2006-2018 Talend Inc. - www.talend.com 003 * <p> 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * <p> 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * <p> 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.talend.sdk.component.junit; 017 018import java.util.Collection; 019import java.util.HashMap; 020import java.util.Iterator; 021import java.util.Map; 022 023import javax.json.JsonObject; 024import javax.json.bind.Jsonb; 025import javax.json.bind.JsonbBuilder; 026import javax.json.bind.JsonbConfig; 027 028/** 029 * An input factory which joins multiple distinct sources reading them in "parallel". 030 * 031 * IMPORTANT: all entries of the map but have the same "size". 032 */ 033public class JoinInputFactory implements ControllableInputFactory { 034 035 private final Map<String, Iterator<?>> data = new HashMap<>(); 036 037 private volatile Jsonb jsonb; 038 039 public JoinInputFactory withInput(final String branch, final Collection<?> branchData) { 040 data.put(branch, branchData.iterator()); 041 return this; 042 } 043 044 @Override 045 public Object read(final String name) { 046 final Iterator<?> iterator = data.get(name); 047 if (iterator != null && iterator.hasNext()) { 048 return map(iterator.next()); 049 } 050 return null; 051 } 052 053 @Override 054 public boolean hasMoreData() { 055 final boolean hasMore = !data.isEmpty() && data.entrySet().stream().allMatch(e -> e.getValue().hasNext()); 056 if (!hasMore && jsonb != null) { 057 synchronized (this) { 058 if (jsonb != null) { 059 try { 060 jsonb.close(); 061 } catch (final Exception e) { 062 // no-op: not important here 063 } 064 } 065 } 066 } 067 return hasMore; 068 } 069 070 @Override 071 public InputFactoryIterable asInputRecords() { 072 return new InputFactoryIterable(this, data); 073 } 074 075 private Object map(final Object next) { 076 if (next == null || JsonObject.class.isInstance(next)) { 077 return next; 078 } 079 if (jsonb == null) { 080 synchronized (this) { 081 if (jsonb == null) { 082 jsonb = JsonbBuilder.create(new JsonbConfig().setProperty("johnzon.cdi.activated", false)); 083 } 084 } 085 } 086 final String str = jsonb.toJson(next); 087 // primitives mainly, not that accurate in main code but for now not forbidden 088 if (str.equals(next.toString())) { 089 return next; 090 } 091 // pojo 092 return jsonb.fromJson(str, JsonObject.class); 093 } 094}