package com.jayway.jsonpath.spi.mapper;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.reflect.TypeToken;
import com.jayway.jsonpath.Configuration;
import com.jayway.jsonpath.JsonPathException;
import com.jayway.jsonpath.TypeRef;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.Callable;
public class GsonMappingProvider implements MappingProvider {
private static final Logger logger = LoggerFactory.getLogger(GsonMappingProvider.class);
private final Callable<Gson> factory;
public GsonMappingProvider(final Gson gson) {
this(new Callable<Gson>() {
@Override
public Gson call() {
return gson;
}
});
}
public GsonMappingProvider(Callable<Gson> factory) {
this.factory = factory;
}
public GsonMappingProvider() {
super();
try {
Class.forName("com.google.gson.Gson");
this.factory = new Callable<Gson>() {
@Override
public Gson call() {
return new Gson();
}
};
} catch (ClassNotFoundException e) {
logger.error("Gson not found on class path. No converters configured.");
throw new JsonPathException("Gson not found on path", e);
}
}
@Override
public <T> T map(Object source, Class<T> targetType, Configuration configuration) {
if(source == null){
return null;
}
try {
return factory.call().getAdapter(targetType).fromJsonTree((JsonElement) source);
} catch (Exception e){
throw new MappingException(e);
}
}
@Override
public <T> T map(Object source, TypeRef<T> targetType, Configuration configuration) {
if(source == null){
return null;
}
try {
return (T) factory.call().getAdapter(TypeToken.get(targetType.getType())).fromJsonTree((JsonElement) source);
} catch (Exception e){
throw new MappingException(e);
}
}
}