/*
* Copyright 2014-2016 the original author or authors.
*
* 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.springframework.integration.support.json;
import java.io.File;
import java.io.FileReader;
import java.io.InputStream;
import java.io.PipedReader;
import java.io.PipedWriter;
import java.io.Reader;
import java.io.Writer;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.Collection;
import java.util.Map;
import java.util.concurrent.Executors;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.boon.json.JsonFactory;
import org.boon.json.JsonParserAndMapper;
import org.boon.json.JsonParserFactory;
import org.boon.json.JsonSerializerFactory;
import org.boon.json.JsonSlurper;
import org.boon.json.ObjectMapper;
import org.springframework.beans.factory.BeanClassLoaderAware;
import org.springframework.integration.mapping.support.JsonHeaders;
import org.springframework.util.ClassUtils;
/**
* The Boon (@link https://github.com/RichardHightower/boon) {@link JsonObjectMapper} implementation.
*
* @author Artem Bilan
* @since 4.1
*/
public class BoonJsonObjectMapper extends JsonObjectMapperAdapter<Map<String, Object>, Object>
implements BeanClassLoaderAware {
private static final Log logger = LogFactory.getLog(BoonJsonObjectMapper.class);
private static final Collection<Class<?>> supportedJsonTypes =
Arrays.<Class<?>>asList(String.class, byte[].class, byte[].class, File.class, InputStream.class, Reader.class);
private final ObjectMapper objectMapper;
private final JsonSlurper slurper = new JsonSlurper();
private volatile ClassLoader classLoader = ClassUtils.getDefaultClassLoader();
public BoonJsonObjectMapper() {
this.objectMapper = JsonFactory.create();
}
public BoonJsonObjectMapper(JsonParserFactory parserFactory, JsonSerializerFactory serializerFactory) {
this.objectMapper = JsonFactory.create(parserFactory, serializerFactory);
}
@Override
public void setBeanClassLoader(ClassLoader classLoader) {
this.classLoader = classLoader;
}
@Override
public String toJson(Object value) throws Exception {
return this.objectMapper.writeValueAsString(value);
}
@Override
public void toJson(Object value, Writer writer) {
this.objectMapper.toJson(value, writer);
}
@Override
@SuppressWarnings("unchecked")
public Map<String, Object> toJsonNode(final Object value) throws Exception {
PipedReader in = new PipedReader();
final PipedWriter out = new PipedWriter(in);
Executors.newSingleThreadExecutor().execute(() -> toJson(value, out));
return (Map<String, Object>) this.slurper.parse(in);
}
@Override
public <T> T fromJson(Object json, Class<T> type) throws Exception {
if (json instanceof String) {
return this.objectMapper.readValue((String) json, type);
}
else if (json instanceof byte[]) {
return this.objectMapper.readValue((byte[]) json, type);
}
else if (json instanceof char[]) {
return this.objectMapper.readValue((char[]) json, type);
}
else if (json instanceof File) {
return this.objectMapper.readValue((File) json, type);
}
else if (json instanceof InputStream) {
return this.objectMapper.readValue((InputStream) json, type);
}
else if (json instanceof Reader) {
return this.objectMapper.readValue((Reader) json, type);
}
else {
throw new IllegalArgumentException("'json' argument must be an instance of: " + supportedJsonTypes
+ " , but gotten: " + json.getClass());
}
}
@Override
@SuppressWarnings({ "unchecked", "rawtypes" })
public <T> T fromJson(Object json, Map<String, Object> javaTypes) throws Exception {
JsonParserAndMapper parser = this.objectMapper.parser();
Class<?> classType = this.createJavaType(javaTypes, JsonHeaders.TYPE_ID);
Class<?> contentClassType = this.createJavaType(javaTypes, JsonHeaders.CONTENT_TYPE_ID);
Class<?> keyClassType = this.createJavaType(javaTypes, JsonHeaders.KEY_TYPE_ID);
if (keyClassType != null) {
logger.warn("Boon doesn't support the Map 'key' conversion. Will be returned raw Map<String, Object>");
if (json instanceof String) {
return (T) parser.parseMap((String) json);
}
else if (json instanceof byte[]) {
return (T) parser.parseMap((byte[]) json);
}
else if (json instanceof char[]) {
return (T) parser.parseMap((char[]) json);
}
else if (json instanceof File) {
return (T) parser.parseMap(new FileReader((File) json));
}
else if (json instanceof InputStream) {
return (T) parser.parseMap((InputStream) json);
}
else if (json instanceof Reader) {
return (T) parser.parseMap((Reader) json);
}
else {
throw new IllegalArgumentException("'json' argument must be an instance of: " + supportedJsonTypes
+ " , but gotten: " + json.getClass());
}
}
if (contentClassType != null) {
if (json instanceof String) {
return (T) this.objectMapper.readValue((String) json, (Class<Collection>) classType, contentClassType);
}
else if (json instanceof byte[]) {
return (T) this.objectMapper.readValue((byte[]) json, (Class<Collection>) classType, contentClassType);
}
else if (json instanceof char[]) {
return (T) this.objectMapper.readValue((char[]) json, (Class<Collection>) classType, contentClassType);
}
else if (json instanceof File) {
return (T) this.objectMapper.readValue((File) json, (Class<Collection>) classType, contentClassType);
}
else if (json instanceof InputStream) {
return (T) this.objectMapper.readValue((InputStream) json, (Class<Collection>) classType,
contentClassType);
}
else if (json instanceof Reader) {
return (T) this.objectMapper.readValue((Reader) json, (Class<Collection>) classType, contentClassType);
}
else {
throw new IllegalArgumentException("'json' argument must be an instance of: " + supportedJsonTypes
+ " , but gotten: " + json.getClass());
}
}
return (T) fromJson(json, classType);
}
protected Class<?> createJavaType(Map<String, Object> javaTypes, String javaTypeKey) throws Exception {
Object classValue = javaTypes.get(javaTypeKey);
if (classValue instanceof Class<?>) {
return (Class<?>) classValue;
}
else if (classValue != null) {
return ClassUtils.forName(classValue.toString(), this.classLoader);
}
else {
return null;
}
}
@Override
public <T> T fromJson(Object parser, Type valueType) throws Exception {
throw new UnsupportedOperationException("Boon doesn't support JSON reader parser abstraction");
}
}