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WW-3629: Provide a JSON Content Handler based on Jackson Lib

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git-svn-id: https://svn.apache.org/repos/asf/struts/struts2/trunk@1203772 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Johannes Geppert
2011-11-18 18:02:03 +00:00
parent 380b6df4f7
commit 077bea8a6f
3 changed files with 185 additions and 7 deletions
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plugins/rest/pom.xml
+22 -7
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@@ -21,17 +21,22 @@
* under the License.
*/
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<parent>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-plugins</artifactId>
<version>2.3.1-SNAPSHOT</version>
</parent>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-rest-plugin</artifactId>
<version>2.3.1-SNAPSHOT</version>
<name>Struts 2 REST Plugin</name>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-rest-plugin</artifactId>
<version>2.3.1-SNAPSHOT</version>
<name>Struts 2 REST Plugin</name>
<properties>
<jackson.version>1.9.2</jackson.version>
</properties>
<dependencies>
<dependency>
@@ -43,6 +48,16 @@
<artifactId>json-lib</artifactId>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
@@ -66,7 +81,7 @@
<optional>true</optional>
</dependency>
<dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<optional>true</optional>
plugins/rest/src/main/java/org/apache/struts2/rest/handler/JacksonLibHandler.java
+68
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@@ -0,0 +1,68 @@
/*
* $Id: JsonLibHandler.java 1097172 2011-04-27 16:36:54Z jogep $
*
* 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.struts2.rest.handler;
import com.opensymphony.xwork2.inject.Inject;
import org.apache.struts2.StrutsConstants;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.ObjectReader;
import org.codehaus.jackson.map.SerializationConfig.Feature;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
/**
* Handles JSON content using jackson-lib
*/
public class JacksonLibHandler implements ContentTypeHandler {
private static final String DEFAULT_CONTENT_TYPE = "application/json";
private String defaultEncoding = "ISO-8859-1";
private ObjectMapper mapper = new ObjectMapper();
public void toObject(Reader in, Object target) throws IOException {
mapper.configure(Feature.WRITE_NULL_MAP_VALUES, false);
ObjectReader or = mapper.readerForUpdating(target);
or.readValue(in); //, new TypeReference<clazz>);
}
public String fromObject(Object obj, String resultCode, Writer stream) throws IOException {
mapper.configure(Feature.WRITE_NULL_MAP_VALUES, false);
mapper.writeValue(stream, obj);
return null;
}
public String getContentType() {
return DEFAULT_CONTENT_TYPE + ";charset=" + this.defaultEncoding;
}
public String getExtension() {
return "json";
}
@Inject(StrutsConstants.STRUTS_I18N_ENCODING)
public void setDefaultEncoding(String val) {
this.defaultEncoding = val;
}
}
plugins/rest/src/test/java/org/apache/struts2/rest/handler/JacksonLibHandlerTest.java
+95
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@@ -0,0 +1,95 @@
/*
* $Id: JsonLibHandlerTest.java 1097172 2011-04-27 16:36:54Z jogep $
*
* 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.struts2.rest.handler;
import junit.framework.TestCase;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class JacksonLibHandlerTest extends TestCase {
public void testFromObject() throws IOException {
Contact contact = new Contact("bob", true, 44);
StringWriter writer = new StringWriter();
JacksonLibHandler handler = new JacksonLibHandler();
handler.fromObject(contact, "success", writer);
String data = writer.toString();
assertTrue(data.startsWith("{"));
assertTrue(data.contains("\"age\":44"));
assertTrue(data.contains("\"important\":true"));
assertTrue(data.contains("\"name\":\"bob\""));
}
public void testFromObjectArray() throws IOException {
Contact contact = new Contact("bob", true, 44);
StringWriter writer = new StringWriter();
JacksonLibHandler handler = new JacksonLibHandler();
handler.fromObject(Arrays.asList(contact), "success", writer);
String data = writer.toString();
assertTrue(data.startsWith("[{"));
assertTrue(data.contains("\"age\":44"));
assertTrue(data.contains("\"important\":true"));
assertTrue(data.contains("\"name\":\"bob\""));
}
public void testToObject() throws IOException {
Contact contact = new Contact("bob", true, 44);
Contact target = new Contact();
StringReader reader = new StringReader("{\"age\":44,\"important\":true,\"name\":\"bob\"}");
JacksonLibHandler handler = new JacksonLibHandler();
handler.toObject(reader, target);
assertEquals(contact, target);
}
public void testToObjectList() throws IOException {
List<Contact> source = new ArrayList<Contact>();
source.add(new Contact("bob", true, 44));
source.add(new Contact("john", false, 33));
List<Contact> target = new ArrayList<Contact>();
StringReader reader = new StringReader("[{\"age\":44,\"important\":true,\"name\":\"bob\"},{\"age\":33,\"important\":false,\"name\":\"john\"}]");
JacksonLibHandler handler = new JacksonLibHandler();
handler.toObject(reader, target);
assertEquals(source.size(), target.size());
}
public void testContentType() throws IOException {
JacksonLibHandler handler = new JacksonLibHandler();
assertEquals(handler.getContentType(), "application/json;charset=ISO-8859-1");
}
public void testDefaultEncoding() throws IOException {
JacksonLibHandler handler = new JacksonLibHandler();
handler.setDefaultEncoding("UTF-8");
assertEquals(handler.getContentType(), "application/json;charset=UTF-8");
}
}