Jackson Map Serialize/Deserialize (#1511)

* Solr w Apache SolrJ * Solr w Apache SolrJ * updated test names and moved add to @before method * create apache-solrj module, moved code from spring-data-solr * More examples for indexing,delete,and query for solrj * More examples for indexing,delete,and query for solrj * Jackson Map Serialize/Deserialize * Jackson Map Serialize/Deserialize
2017-03-27 05:46:58 -07:00
parent e6836c01c7
commit 427077ebfa
4 changed files with 239 additions and 0 deletions
@@ -0,0 +1,63 @@
+package com.baeldung.jackson.deserialization;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.baeldung.jackson.entities.MyPair;
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class JacksonMapDeserializeTest {
+
+	private Map<MyPair, String> map;
+	private Map<MyPair, MyPair> cmap;
+
+	@Test
+	public void whenSimpleMapDeserialize_thenCorrect()
+			throws JsonParseException, JsonMappingException, IOException {
+
+		final String jsonInput = "{\"key\": \"value\"}";
+		final ObjectMapper mapper = new ObjectMapper();
+		TypeReference<HashMap<String, String>> typeRef = new TypeReference<HashMap<String, String>>() {
+		};
+
+		final Map<String, String> map = mapper.readValue(jsonInput, typeRef);
+
+		Assert.assertEquals("value", map.get("key"));
+	}
+
+	@Test
+	public void whenObjectStringMapDeserialize_thenCorrect()
+			throws JsonParseException, JsonMappingException, IOException {
+
+		final String jsonInput = "{\"Abbott and Costello\" : \"Comedy\"}";
+		final ObjectMapper mapper = new ObjectMapper();
+
+		TypeReference<HashMap<MyPair, String>> typeRef = new TypeReference<HashMap<MyPair, String>>() {
+		};
+		map = mapper.readValue(jsonInput, typeRef);
+
+		Assert.assertEquals("Comedy", map.get(new MyPair("Abbott", "Costello")));
+	}
+
+	@Test
+	public void whenObjectObjectMapDeserialize_thenCorrect()
+			throws JsonParseException, JsonMappingException, IOException {
+
+		final String jsonInput = "{\"Abbott and Costello\" : \"Comedy and 1940s\"}";
+		final ObjectMapper mapper = new ObjectMapper();
+		TypeReference<HashMap<MyPair, MyPair>> typeRef = new TypeReference<HashMap<MyPair, MyPair>>() {
+		};
+
+		cmap = mapper.readValue(jsonInput, typeRef);
+
+		Assert.assertEquals(new MyPair("Comedy", "1940s"),
+				cmap.get(new MyPair("Abbott", "Costello")));
+	}
+}
@@ -0,0 +1,71 @@
+package com.baeldung.jackson.serialization;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.baeldung.jackson.entities.MyPair;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import com.fasterxml.jackson.databind.ser.std.MapSerializer;
+
+public class JacksonMapSerializeTest {
+
+	@JsonSerialize(keyUsing = MyPairSerializer.class)
+	private Map<MyPair, String> map;
+
+	@JsonSerialize(keyUsing = MapSerializer.class)
+	private Map<MyPair, MyPair> cmap;
+
+	@JsonSerialize(keyUsing = MyPairSerializer.class)
+	private MyPair mapKey;
+
+	@JsonSerialize(keyUsing = MyPairSerializer.class)
+	private MyPair mapValue;
+
+	@Test
+	public void whenSimpleMapSerialize_thenCorrect()
+			throws JsonProcessingException {
+
+		Map<String, String> map = new HashMap<String, String>();
+		map.put("key", "value");
+
+		final ObjectMapper mapper = new ObjectMapper();
+		final String jsonResult = mapper.writeValueAsString(map);
+
+		Assert.assertEquals("{\"key\":\"value\"}", jsonResult);
+	}
+
+	@Test
+	public void whenCustomObjectStringMapSerialize_thenCorrect()
+			throws JsonProcessingException {
+
+		map = new HashMap<MyPair, String>();
+		MyPair key = new MyPair("Abbott", "Costello");
+		map.put(key, "Comedy");
+
+		final ObjectMapper mapper = new ObjectMapper();
+		final String jsonResult = mapper.writeValueAsString(map);
+
+		Assert.assertEquals("{\"Abbott and Costello\":\"Comedy\"}", jsonResult);
+	}
+
+	@Test
+	public void whenCustomObjectObjectMapSerialize_thenCorrect()
+			throws JsonProcessingException {
+
+		cmap = new HashMap<MyPair, MyPair>();
+		mapKey = new MyPair("Abbott", "Costello");
+		mapValue = new MyPair("Comedy", "1940's");
+		cmap.put(mapKey, mapValue);
+
+		final ObjectMapper mapper = new ObjectMapper();
+		final String jsonResult = mapper.writeValueAsString(cmap);
+
+		Assert.assertEquals("{\"Abbott and Costello\":\"Comedy and 1940's\"}",
+				jsonResult);
+	}
+}