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org.frameworkset.http.converter.json.MappingJackson1HttpMessageConverter Maven / Gradle / Ivy
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/*
* Copyright 2008-2010 biaoping.yin
*
* 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 org.frameworkset.http.converter.json;
import org.codehaus.jackson.JsonEncoding;
import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializationConfig;
import org.codehaus.jackson.map.type.TypeFactory;
import org.codehaus.jackson.type.JavaType;
import org.frameworkset.http.HttpInputMessage;
import org.frameworkset.http.HttpOutputMessage;
import org.frameworkset.http.MediaType;
import org.frameworkset.http.ServerHttpRequest;
import org.frameworkset.http.converter.AbstractHttpMessageConverter;
import org.frameworkset.http.converter.HttpMessageNotReadableException;
import org.frameworkset.http.converter.HttpMessageNotWritableException;
import org.frameworkset.spi.InitializingBean;
import org.frameworkset.util.Assert;
import org.frameworkset.util.annotations.DateFormateMeta;
import org.frameworkset.util.annotations.ValueConstants;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.List;
/**
* Implementation of {@link }
* that can read and write JSON using Jackson's {@link ObjectMapper}.
*
* This converter can be used to bind to typed beans, or untyped {@link java.util.HashMap HashMap} instances.
*
*
By default, this converter supports {@code application/json}. This can be overridden by setting the
* {@link #setSupportedMediaTypes(List) supportedMediaTypes} property.
*
* @author Arjen Poutsma
* @since 3.0
* @see org.frameworkset.web.servlet.view.json.MappingJacksonJsonView
*/
public class MappingJackson1HttpMessageConverter extends AbstractHttpMessageConverter implements JsonConvertInf,InitializingBean{
private String jsonpCallback = ServerHttpRequest.JSONPCALLBACK_PARAM_NAME;
private ObjectMapper objectMapper = null;
private String dateFormat;
private String locale;
private String timeZone;
private boolean disableTimestamp = false;
private boolean prefixJson = false;
/**
* Construct a new {@code BindingJacksonHttpMessageConverter}.
*/
public MappingJackson1HttpMessageConverter() {
super(jsonmediatypes);
objectMapper = new ObjectMapper();
this.objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES,false);
}
public void setFailedOnUnknownProperties(boolean failedOnUnknownProperties) {
this.objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES,failedOnUnknownProperties);
}
public String getDateFormat() {
return dateFormat;
}
public void setDateFormat(String dateFormat) {
this.dateFormat = dateFormat;
}
public String getLocale() {
return locale;
}
public void setLocale(String locale) {
this.locale = locale;
}
public String getTimeZone() {
return timeZone;
}
public void setTimeZone(String timeZone) {
this.timeZone = timeZone;
}
public boolean isDisableTimestamp() {
return disableTimestamp;
}
public void setDisableTimestamp(boolean disableTimestamp) {
this.disableTimestamp = disableTimestamp;
}
/**
* Sets the {@code ObjectMapper} for this view. If not set, a default
* {@link ObjectMapper#ObjectMapper() ObjectMapper} is used.
* Setting a custom-configured {@code ObjectMapper} is one way to take further control of the JSON serialization
* process. For example, an extended {@link org.codehaus.jackson.map.SerializerFactory} can be configured that provides
* custom serializers for specific types. The other option for refining the serialization process is to use Jackson's
* provided annotations on the types to be serialized, in which case a custom-configured ObjectMapper is unnecessary.
*/
public void setObjectMapper(Object objectMapper) {
Assert.notNull(objectMapper, "'objectMapper' must not be null");
this.objectMapper = (ObjectMapper)objectMapper;
}
public void init() {
if(dateFormat != null && !dateFormat.equals("")) {
DateFormateMeta dateFormateMeta = DateFormateMeta.buildDateFormateMeta(this.dateFormat, this.locale, this.timeZone);
this.objectMapper.setDateFormat(dateFormateMeta.toDateFormat());
}
if(this.disableTimestamp){
objectMapper.disable(SerializationConfig.Feature.WRITE_DATES_AS_TIMESTAMPS);
}
}
public boolean canWrite(MediaType mediaType) {
if (mediaType == null || MediaType.ALL.equals(mediaType)) {
return false;
}
for (MediaType supportedMediaType : getSupportedMediaTypes()) {
if (supportedMediaType.isCompatibleWith(mediaType)) {
return true;
}
}
return false;
}
/**
* Indicates whether the JSON output by this view should be prefixed with "{} &&". Default is false.
*
Prefixing the JSON string in this manner is used to help prevent JSON Hijacking. The prefix renders the string
* syntactically invalid as a script so that it cannot be hijacked. This prefix does not affect the evaluation of JSON,
* but if JSON validation is performed on the string, the prefix would need to be ignored.
*/
public void setPrefixJson(boolean prefixJson) {
this.prefixJson = prefixJson;
}
@Override
public boolean canRead(Class clazz, MediaType mediaType) {
JavaType javaType = getJavaType(clazz);
return this.objectMapper.canDeserialize(javaType) && canRead(mediaType);
}
/**
* Returns the Jackson {@link JavaType} for the specific class.
*
*
Default implementation returns {@link TypeFactory#type(java.lang.reflect.Type)}, but this can be overridden
* in subclasses, to allow for custom generic collection handling. For instance:
*
* protected JavaType getJavaType(Class<?> clazz) {
* if (List.class.isAssignableFrom(clazz)) {
* return TypeFactory.collectionType(ArrayList.class, MyBean.class);
* } else {
* return super.getJavaType(clazz);
* }
* }
*
*
* @param clazz the class to return the java type for
* @return the java type
*/
protected JavaType getJavaType(Class clazz) {
return objectMapper.getTypeFactory().type(clazz);
}
@Override
public boolean canWrite( Class clazz, MediaType mediaType) {
return (this.objectMapper.canSerialize(clazz) && this.canWrite(mediaType));
}
@Override
public boolean supports(Class clazz) {
// should not be called, since we override canRead/Write instead
throw new UnsupportedOperationException();
}
@Override
public Object readInternal(Class clazz, HttpInputMessage inputMessage)
throws IOException, HttpMessageNotReadableException {
JavaType javaType = getJavaType(clazz);
try {
return this.objectMapper.readValue(inputMessage.getBody(), javaType);
}
catch (JsonParseException ex) {
throw new HttpMessageNotReadableException("Could not read JSON: " + ex.getMessage(), ex);
}
}
/**
* Abstract template method that reads the actual object. Invoked from {@link #read}.
* @param clazz the type of object to return
* @param inputMessage the HTTP input message to read from
* @return the converted object
* @throws IOException in case of I/O errors
* @throws HttpMessageNotReadableException in case of conversion errors
*/
@Override
public Object readInternal(Class clazz,Class[] elementTypes, HttpInputMessage inputMessage)
throws IOException, HttpMessageNotReadableException{
JavaType javaType = null;
if(elementTypes == null || elementTypes.length == 0)
javaType = getJavaType(clazz);
else
javaType = objectMapper.getTypeFactory().constructParametricType(clazz, elementTypes);
return this.objectMapper.readValue(inputMessage.getBody(), javaType);
}
@Override
public void writeInternal(Object o, HttpOutputMessage outputMessage,HttpInputMessage inputMessage)
throws IOException, HttpMessageNotWritableException {
MediaType contenttype = outputMessage.getHeaders().getContentType();
JsonEncoding encoding = getEncoding(contenttype);
JsonGenerator jsonGenerator =
this.objectMapper.getJsonFactory().createJsonGenerator(outputMessage.getBody(), encoding);
try {
if(!contenttype.isCompatibleWith(this.jsonmediatypes[1]))
{
if (this.prefixJson) {
jsonGenerator.writeRaw("{} && ");
}
this.objectMapper.writeValue(jsonGenerator, o);
}
else
{
HttpServletRequest request = inputMessage.getServletRequest();
String callback = request.getParameter(jsonpCallback);
if(callback == null || callback.equals(""))
{
logger.warn("jsonp responsed warn:callback function is not post by client request,direct to reponse json datas.");
if (this.prefixJson) {
jsonGenerator.writeRaw("{} && ");
}
this.objectMapper.writeValue(jsonGenerator, o);
}
else
{
jsonGenerator.writeRaw(callback);
jsonGenerator.writeRaw("(");
if (this.prefixJson) {
jsonGenerator.writeRaw("{} && ");
}
this.objectMapper.writeValue(jsonGenerator, o);
jsonGenerator.writeRaw(")");
jsonGenerator.flush();
}
}
}
catch (JsonGenerationException ex) {
throw new HttpMessageNotWritableException("Could not write JSON: " + ex.getMessage(), ex);
}
}
private JsonEncoding getEncoding(MediaType contentType) {
if (contentType != null && contentType.getCharSet() != null) {
Charset charset = contentType.getCharSet();
for (JsonEncoding encoding : JsonEncoding.values()) {
if (charset.name().equals(encoding.getJavaName())) {
return encoding;
}
}
}
return JsonEncoding.UTF8;
}
/**
* 获取用户请求报文对应的数据类型：String,json
* @return
*/
public String getRequetBodyDataType()
{
return ValueConstants.datatype_json;
}
/**
* 获取用户请求报文对应的数据类型：String,json
* @return
*/
public String getResponseBodyDataType()
{
return ValueConstants.datatype_json;
}
public boolean canWrite(String datatype) {
// TODO Auto-generated method stub
if(datatype == null)
return false;
if(datatype.equals(ValueConstants.datatype_json))
return true;
else if(datatype.equals(ValueConstants.datatype_jsonp))
return true;
else
return false;
}
public String getJsonpCallback() {
return jsonpCallback;
}
public void setJsonpCallback(String jsonpCallback) {
this.jsonpCallback = jsonpCallback;
}
@Override
public void afterPropertiesSet() throws Exception {
this.init();
}
}
