| /* |
| * 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.johnzon.core; |
| |
| import static java.util.stream.Collectors.joining; |
| import static org.junit.Assert.assertEquals; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.StringReader; |
| import java.nio.charset.StandardCharsets; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.stream.Collectors; |
| import java.util.stream.IntStream; |
| |
| import jakarta.json.Json; |
| import jakarta.json.JsonNumber; |
| import jakarta.json.JsonString; |
| import jakarta.json.stream.JsonParser; |
| import jakarta.json.stream.JsonParsingException; |
| |
| import org.junit.Test; |
| |
| public class JsonParserStreamingTest { |
| @Test |
| public void parseEscapeCharacters() throws IOException { |
| final int len = 8192; |
| final byte[] bytes = ("{\"source\":\"" + |
| IntStream.range(0, 16558).mapToObj(it -> "\\").collect(joining("")) + |
| "\t\"}").getBytes(StandardCharsets.UTF_8); |
| |
| final BufferStrategy.BufferProvider<char[]> bs = BufferStrategyFactory.valueOf("QUEUE").newCharProvider(len); |
| try (final InputStream stream = new ByteArrayInputStream(bytes); |
| final JsonStreamParserImpl impl = new JsonStreamParserImpl(stream, len, bs, bs, false)) { |
| |
| while (impl.hasNext()) { |
| impl.next(); |
| } |
| } catch (final ArrayIndexOutOfBoundsException aioobe) { |
| assertEquals("Buffer too small for such a long string", aioobe.getMessage()); |
| } |
| } |
| |
| @Test |
| public void testArrayStream() { |
| { |
| // int |
| String json = "[1,2,3,4]"; |
| String sum = parserAndConcat(json); |
| assertEquals(json, sum); |
| } |
| { |
| // STring |
| String json = "[\"1\",\"2\",\"3\",\"4\"]"; |
| String sum = parserAndConcat(json); |
| assertEquals(json, sum); |
| } |
| } |
| |
| @Test |
| public void testValueStreamForArrays() { |
| { |
| // int |
| String json = "[1,2,3,4]"; |
| String sum = parserAndConcat(json); |
| assertEquals(json, sum); |
| } |
| { |
| // String |
| String json = "[\"1\",\"2\",\"3\",\"4\"]"; |
| String sum = parserAndConcat(json); |
| assertEquals(json, sum); |
| } |
| |
| { |
| // single String |
| String json = "[\"In a galaxy far far away\"]"; |
| String sum = parserAndConcat(json); |
| assertEquals(json, sum); |
| } |
| } |
| |
| @Test |
| public void testValueStream() { |
| { |
| String json = "\"a string value\""; |
| String sum = parserAndConcat(json); |
| assertEquals(json, sum); |
| } |
| |
| { |
| String sum = parserAndConcat("234"); |
| assertEquals("234", sum); |
| } |
| } |
| |
| @Test |
| public void testValueStreamForObjects() { |
| String json = "{\"address\":\"somewhere else\"}"; |
| String sum = parserAndConcat(json); |
| assertEquals(json, sum); |
| } |
| |
| private String parserAndConcat(String json) { |
| StringReader sr = new StringReader(json); |
| |
| try (JsonParser jsonParser = Json.createParser(sr)) { |
| String sum = jsonParser.getValueStream() |
| .map(v -> v.toString()) |
| .collect(Collectors.joining(",")); |
| return sum; |
| } |
| } |
| |
| @Test |
| public void testGetArrayStream() { |
| StringReader sr = new StringReader("[1,2,3,4,5,6]"); |
| |
| try (JsonParser jsonParser = Json.createParser(sr)) { |
| JsonParser.Event firstEvent = jsonParser.next(); |
| assertEquals(JsonParser.Event.START_ARRAY, firstEvent); |
| |
| int sum = jsonParser.getArrayStream() |
| .mapToInt(v -> ((JsonNumber)v).intValue()) |
| .sum(); |
| assertEquals(21, sum); |
| } |
| } |
| |
| @Test(expected = JsonParsingException.class) |
| public void testParseErrorInGetArrayStream() { |
| StringReader sr = new StringReader("[\"this is\":\"not an object\"]"); |
| |
| try (JsonParser jsonParser = Json.createParser(sr)) { |
| JsonParser.Event firstEvent = jsonParser.next(); |
| assertEquals(JsonParser.Event.START_ARRAY, firstEvent); |
| |
| jsonParser.getArrayStream().forEach(dummy -> {}); |
| } |
| } |
| |
| @Test |
| public void testGetObjectStream() { |
| StringReader sr = new StringReader("{\"foo\":\"bar\",\"baz\":\"quux\",\"something\":\"else\"}"); |
| |
| try (JsonParser jsonParser = Json.createParser(sr)) { |
| JsonParser.Event firstEvent = jsonParser.next(); |
| assertEquals(JsonParser.Event.START_OBJECT, firstEvent); |
| |
| Map<String, String> mappings = jsonParser.getObjectStream() |
| .collect(Collectors.toMap(Map.Entry::getKey, e -> ((JsonString)e.getValue()).getString())); |
| |
| Map<String, String> expectedMappings = new HashMap<>(); |
| expectedMappings.put("foo", "bar"); |
| expectedMappings.put("baz", "quux"); |
| expectedMappings.put("something", "else"); |
| assertEquals(expectedMappings, mappings); |
| } |
| } |
| |
| @Test(expected = JsonParsingException.class) |
| public void testParseErrorInGetObjectStream() { |
| StringReader sr = new StringReader("{42}"); |
| |
| try (JsonParser jsonParser = Json.createParser(sr)) { |
| JsonParser.Event firstEvent = jsonParser.next(); |
| assertEquals(JsonParser.Event.START_OBJECT, firstEvent); |
| |
| jsonParser.getObjectStream().forEach(dummy -> {}); |
| } |
| } |
| |
| } |