| /* |
| * Copyright 1999-2015 dangdang.com. |
| * <p> |
| * 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. |
| * </p> |
| */ |
| |
| package io.elasticjob.cloud.restful; |
| |
| import io.elasticjob.cloud.util.json.GsonFactory; |
| |
| import javax.ws.rs.Consumes; |
| import javax.ws.rs.Produces; |
| 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.MessageBodyWriter; |
| import javax.ws.rs.ext.Provider; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.OutputStream; |
| import java.io.OutputStreamWriter; |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.Type; |
| |
| /** |
| * 基于GSON解析JSON的解析器. |
| * |
| * @author zhangliang |
| */ |
| @Provider |
| @Produces(MediaType.APPLICATION_JSON) |
| @Consumes(MediaType.APPLICATION_JSON) |
| public final class GsonJsonProvider implements MessageBodyWriter<Object>, MessageBodyReader<Object> { |
| |
| private static final String UTF_8 = "UTF-8"; |
| |
| @Override |
| public Object readFrom(final Class<Object> type, final Type genericType, final Annotation[] annotations, |
| final MediaType mediaType, final MultivaluedMap<String, String> httpHeaders, final InputStream entityStream) { |
| try (InputStreamReader streamReader = new InputStreamReader(entityStream, UTF_8)) { |
| return GsonFactory.getGson().fromJson(streamReader, type.equals(genericType) ? type : genericType); |
| } catch (final IOException ex) { |
| throw new RestfulException(ex); |
| } |
| } |
| |
| @Override |
| public void writeTo(final Object object, final Class<?> type, final Type genericType, final Annotation[] annotations, final MediaType mediaType, |
| final MultivaluedMap<String, Object> httpHeaders, final OutputStream entityStream) throws IOException, WebApplicationException { |
| try (OutputStreamWriter writer = new OutputStreamWriter(entityStream, UTF_8)) { |
| GsonFactory.getGson().toJson(object, type.equals(genericType) ? type : genericType, writer); |
| } catch (final IOException ex) { |
| throw new RestfulException(ex); |
| } |
| } |
| |
| @Override |
| public boolean isReadable(final Class<?> type, final Type genericType, final Annotation[] annotations, final MediaType mediaType) { |
| return true; |
| } |
| |
| @Override |
| public boolean isWriteable(final Class<?> type, final Type genericType, final Annotation[] annotations, final MediaType mediaType) { |
| return true; |
| } |
| |
| @Override |
| public long getSize(final Object object, final Class<?> type, final Type genericType, final Annotation[] annotations, final MediaType mediaType) { |
| return -1; |
| } |
| } |