paul:
I am very Sorry for sending a bad code to you, Because that code include
some chinese character.I had read the entity-provider-1.0.1-project.zip when
sending the thread before, and i had wrote the code following the
entity-provider example.
Following the right code:
====================================
package com.jersey.sample.provider;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.ws.rs.Consumes;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.Provider;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl;
import com.jersey.sample.Constant;
/**
*
* @author Jack Dou
* @since Dec 10, 2008
*/
@Consumes("application/json")
@Provider
public class MapReader<E> implements MessageBodyReader<Map<String, List<E>>>
{
private static String[] methods = { "add", "delete", "update" };
private Map<String, List<E>> returnMap = new HashMap<String, List<E>>();
public boolean isReadable(Class<?> type, Type genericType,
Annotation[] annotations, MediaType mediaType) {
return type.isAssignableFrom(Map.class);
}
@SuppressWarnings("unchecked")
public Map<String, List<E>> readFrom(Class<Map<String, List<E>>> type,
Type genericType, Annotation[] annotations, MediaType mediaType,
MultivaluedMap<String, String> httpHeaders, InputStream
entityStream)
throws IOException, WebApplicationException {
String formData = readAsString(entityStream);
JSONObject fromObj = JSONObject.fromObject(formData);
Class<E> cls = getActualClass(genericType);
for (String method : methods) {
boolean isHasTheMethod = fromObj.containsKey(method);
if (isHasTheMethod) {
JSONArray arr = fromObj.getJSONArray(method);
List<E> list = new ArrayList<E>();
for (int i=0,size = arr.size(); i<size; i++) {
JSONObject tempObj = (JSONObject)arr.get(i);
JSONObject.toBean(tempObj, cls);
list.add((E)JSONObject.toBean(tempObj, cls));
}
returnMap.put(method, list);
}
}
return returnMap;
}
@SuppressWarnings("unchecked")
public Class<E> getActualClass(Type genericType) {
ParameterizedTypeImpl pti = (ParameterizedTypeImpl) genericType;
Type[] types = pti.getActualTypeArguments();
ParameterizedTypeImpl type = (ParameterizedTypeImpl) types[1];
Type[] types2 = type.getActualTypeArguments();
Class<E> type2 = (Class<E>) types2[0];
return type2;
}
public final String readAsString(InputStream in) throws IOException {
Reader reader = new InputStreamReader(in,Constant.CHARSET);
StringBuilder sb = new StringBuilder();
char[] c = new char[1024];
int l;
while ((l = reader.read(c)) != -1) {
sb.append(c, 0, l);
}
return sb.toString();
}
}
=====================================
Paul Sandoz wrote:
>
> Why are you passing methods in the request? The methods "add",
> "delete", "update" can correspond to POST, DELETE and PUT methods in
> HTTP.
>
We want deal batch,So we sent a HTTP POST method from browser client, This
idea is from google restful api:
http://code.google.com/apis/calendar/developers_guide_protocol.html#batch
I don't my way is right or not , Do you point it ?
whether or not , I want implement convert a json string to java Map Object,
Can you give me a example if you can, your entity-provider example is
consucesing a application/x-www-form-urlencoded MidiaType, not is
application/json.
Ps: Is Converting json string to Java Set Object implemented for jersey1.0.1
default?
I am very thanks for your so soon replay. expacting your replay again.
Best Regards!
yours Jack from beijing.
Paul Sandoz wrote:
>
> Hi,
>
> The source code you sent looks like it is corrupted, namely the
> readFrom method has the following:
>
> for (int i=0,size = arr.size(); i getActualClass(Type
> genericType) {
> ParameterizedTypeImpl pti = (ParameterizedTypeImpl)
> genericType;
> Type[] types = pti.getActualTypeArguments();
> ParameterizedTypeImpl type = (ParameterizedTypeImpl) types[1];
> Type[] types2 = type.getActualTypeArguments();
> Class type2 = (Class) types2[0];
> return type2;
>
> So i cannot evaluate the code properly.
>
> There is no existing functionality to return a Map instance for a JSON
> entity. The closest supported Java type is JSONObject from the
> jettison library.
>
> Why are you passing methods in the request? The methods "add",
> "delete", "update" can correspond to POST, DELETE and PUT methods in
> HTTP.
>
> For an example of implementing providers you can look at the following
> sample:
>
>
> http://download.java.net/maven/2/com/sun/jersey/samples/entity-provider/1.0.1/entity-provider-1.0.1-project.zip
>
> Paul.
> On Dec 10, 2008, at 11:39 AM, beanor wrote:
>
>> hi paul: I want Unmarshall a json string to Map param of Resource'
>> method，now , I do it as follow:
>> package com.jersey.sample.provider;
>>
>> import java.io.IOException;
>> import java.io.InputStream;
>> import java.io.InputStreamReader;
>> import java.io.Reader;
>> import java.lang.annotation.Annotation;
>> import java.lang.reflect.Type;
>> import java.util.ArrayList;
>> import java.util.HashMap;
>> import java.util.List;
>> import java.util.Map;
>>
>> import javax.ws.rs.Consumes;
>> import javax.ws.rs.WebApplicationException;
>> import javax.ws.rs.core.MediaType;
>> import javax.ws.rs.core.MultivaluedMap;
>> import javax.ws.rs.ext.MessageBodyReader;
>> import javax.ws.rs.ext.Provider;
>>
>> import net.sf.json.JSONArray;
>> import net.sf.json.JSONObject;
>> import sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl;
>>
>> import com.jersey.sample.Constant;
>>
>> /**
>> *
>> * @author Jack Dou
>> * @since Dec 10, 2008
>> */
>> @Consumes("application/json")
>> @Provider
>> public class MapReader implements MessageBodyReader>> {
>> private static String[] methods = { "add", "delete", "update" };
>> private Map> returnMap = new HashMap>();
>>
>> public boolean isReadable(Class type, Type genericType,
>> Annotation[] annotations, MediaType mediaType) {
>> return type.isAssignableFrom(Map.class);
>> }
>>
>> @SuppressWarnings("unchecked")
>> public Map> readFrom(Class>> type,
>> Type genericType, Annotation[] annotations, MediaType
>> mediaType,
>> MultivaluedMap httpHeaders, InputStream entityStream)
>> throws IOException, WebApplicationException {
>> String formData = readAsString(entityStream);
>> JSONObject fromObj = JSONObject.fromObject(formData);
>> Class cls = getActualClass(genericType);
>> for (String method : methods) {
>> boolean isHasTheMethod = fromObj.containsKey(method);
>> if (isHasTheMethod) {
>> JSONArray arr = fromObj.getJSONArray(method);
>> List list = new ArrayList();
>> for (int i=0,size = arr.size(); i
>> getActualClass(Type genericType) {
>> ParameterizedTypeImpl pti = (ParameterizedTypeImpl)
>> genericType;
>> Type[] types = pti.getActualTypeArguments();
>> ParameterizedTypeImpl type = (ParameterizedTypeImpl) types[1];
>> Type[] types2 = type.getActualTypeArguments();
>> Class type2 = (Class) types2[0];
>> return type2;
>> }
>>
>> /**
>> * 转化读取输入流中的数据为字符串型
>> *
>> * @param in 输入流
>> * @return 输入流转化后的字符串
>> * @throws IOException 输入流转化字符串失败，则报IO
>> 异常
>> */
>> public final String readAsString(InputStream in) throws
>> IOException {
>> Reader reader = new InputStreamReader(in,Constant.CHARSET);
>> StringBuilder sb = new StringBuilder();
>> char[] c = new char[1024];
>> int l;
>> while ((l = reader.read(c)) != -1) {
>> sb.append(c, 0, l);
>> }
>> return sb.toString();
>> }
>> }
>> But I use json-lib.jar ,not jettison.jar, Can you gei me a demo for
>> manual Unmarshall a json string to Map param using jersey default
>> way? My English is poor,Sorry,Do you understand my meaning?
>> View this message in context: can i use jersey's json Unmarshaller?
>> Sent from the Jersey mailing list archive at Nabble.com.
>
>
>
--
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