/* * Copyright 2014 Bazaarvoice, Inc. * * 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 com.bazaarvoice.jolt.jsonUtil.testdomain.one; import com.bazaarvoice.jolt.Diffy; import com.bazaarvoice.jolt.JsonUtil; import com.bazaarvoice.jolt.JsonUtils; import com.bazaarvoice.jolt.jsonUtil.testdomain.QueryFilter; import com.bazaarvoice.jolt.jsonUtil.testdomain.QueryParam; import com.bazaarvoice.jolt.jsonUtil.testdomain.RealFilter; import com.fasterxml.jackson.core.JsonParser; import com.fasterxml.jackson.core.Version; import com.fasterxml.jackson.core.type.TypeReference; import com.fasterxml.jackson.databind.DeserializationContext; import com.fasterxml.jackson.databind.JsonDeserializer; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.module.SimpleModule; import com.fasterxml.jackson.databind.node.ObjectNode; import org.testng.Assert; import org.testng.annotations.Test; import java.io.IOException; import java.util.Map; public class MappingTest1 { private Diffy diffy = new Diffy(); public static class QueryFilter1Deserializer extends JsonDeserializer<QueryFilter> { /** * Demonstrates how to do recursive polymorphic JSON deserialization in Jackson 2.2. * * Aka specify a Deserializer and "catch" some input, determine what type of Class it * should be parsed too, and then reuse the Jackson infrastructure to recursively do so. */ @Override public QueryFilter deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException { ObjectNode root = jp.readValueAsTree(); JsonNode queryParam = root.get("queryParam"); String value = queryParam.asText(); // pass in our objectCodec so that the subJsonParser knows about our configured Modules and Annotations JsonParser subJsonParser = root.traverse( jp.getCodec() ); // Determine the "type" of filter we are dealing with Real or Logical and specify type if ( "OR".equals( value ) || "AND".equals( value ) ) { return subJsonParser.readValueAs( LogicalFilter1.class ); } else { return subJsonParser.readValueAs( RealFilter.class ); } } } @Test public void testPolymorphicJacksonSerializationAndDeserialization() { ObjectMapper mapper = new ObjectMapper(); SimpleModule testModule = new SimpleModule("testModule", new Version(1, 0, 0, null, null, null)) .addDeserializer( QueryFilter.class, new QueryFilter1Deserializer() ); mapper.registerModule(testModule); // Verifying that we can pass in a custom Mapper and create a new JsonUtil JsonUtil jsonUtil = JsonUtils.customJsonUtil( mapper ); String testFixture = "/jsonUtils/testdomain/one/queryFilter-realAndLogical.json"; // TEST JsonUtil and our deserialization logic QueryFilter queryFilter = jsonUtil.classpathToType( testFixture, new TypeReference<QueryFilter>() {} ); // Make sure the hydrated queryFilter looks right Assert.assertTrue( queryFilter instanceof LogicalFilter1 ); Assert.assertEquals( QueryParam.AND, queryFilter.getQueryParam() ); Assert.assertTrue( queryFilter.isLogical() ); Assert.assertEquals( 3, queryFilter.getFilters().size() ); Assert.assertNotNull( queryFilter.getFilters().get( QueryParam.OR ) ); // Make sure one of the top level RealFilters looks right QueryFilter productIdFilter = queryFilter.getFilters().get( QueryParam.PRODUCTID ); Assert.assertTrue( productIdFilter.isReal() ); Assert.assertEquals( QueryParam.PRODUCTID, productIdFilter.getQueryParam() ); Assert.assertEquals( "Acme-1234", productIdFilter.getValue() ); // Make sure the nested OR looks right QueryFilter orFilter = queryFilter.getFilters().get( QueryParam.OR ); Assert.assertTrue( orFilter.isLogical() ); Assert.assertEquals( QueryParam.OR, orFilter.getQueryParam() ); Assert.assertEquals( 2, orFilter.getFilters().size() ); // Make sure nested AND looks right QueryFilter nestedAndFilter = orFilter.getFilters().get( QueryParam.AND ); Assert.assertTrue( nestedAndFilter.isLogical() ); Assert.assertEquals( QueryParam.AND, nestedAndFilter.getQueryParam() ); Assert.assertEquals( 2, nestedAndFilter.getFilters().size() ); // SERIALIZE TO STRING to test serialization logic String unitTestString = jsonUtil.toJsonString( queryFilter ); // LOAD and Diffy the plain vanilla JSON versions of the documents Map<String, Object> actual = JsonUtils.jsonToMap( unitTestString ); Map<String, Object> expected = JsonUtils.classpathToMap( testFixture ); // Diffy the vanilla versions Diffy.Result result = diffy.diff( expected, actual ); if (!result.isEmpty()) { Assert.fail( "Failed.\nhere is a diff:\nexpected: " + JsonUtils.toJsonString( result.expected ) + "\n actual: " + JsonUtils.toJsonString( result.actual ) ); } } }