/*
* Hibernate Search, full-text search for your domain model
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.search.elasticsearch.settings.impl.translation;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.hibernate.search.elasticsearch.logging.impl.Log;
import org.hibernate.search.elasticsearch.settings.impl.model.AnalysisDefinition;
import org.hibernate.search.exception.AssertionFailure;
import org.hibernate.search.util.logging.impl.LoggerFactory;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonParser;
class JsonPassThroughAnalysisDefinitionFactory<D extends AnalysisDefinition> implements AnalysisDefinitionFactory<D> {
static final Log LOG = LoggerFactory.make( Log.class );
private final Class<D> targetClass;
private final Class<?> factoryClass;
private final JsonParser jsonParser = new JsonParser();
public JsonPassThroughAnalysisDefinitionFactory(Class<D> targetClass, Class<?> factoryClass) {
super();
this.targetClass = targetClass;
this.factoryClass = factoryClass;
}
@Override
public String getType() {
throw new UnsupportedOperationException( "This factory defines the definition type based on the Hibernate Search parameters." );
}
@Override
public D create(Map<String,String> parameters) {
D result;
try {
result = targetClass.newInstance();
}
catch (InstantiationException | IllegalAccessException e) {
throw new AssertionFailure( "Unexpected failure while instanciating a definition", e );
}
Map<String, JsonElement> parameterMap = new LinkedHashMap<>();
for ( Entry<String, String> parameter : parameters.entrySet() ) {
String name = parameter.getKey();
String value = parameter.getValue();
switch ( name ) {
case "type":
result.setType( parseJsonString( name, value ) );
break;
default:
parameterMap.put( name, parseJson( name, value ) );
break;
}
}
if ( !parameterMap.isEmpty() ) {
result.setParameters( parameterMap );
}
return result;
}
private String parseJsonString(String name, String value) {
try {
/*
* Use getAsJsonPrimitive() first in order to throw an exception
* if the element is an array, number, or other
*/
return jsonParser.parse( value ).getAsJsonPrimitive().getAsString();
}
catch (JsonParseException | ClassCastException | IllegalStateException e) {
throw LOG.invalidAnalysisDefinitionJsonStringParameter( factoryClass, name, e.getLocalizedMessage(), e );
}
}
private JsonElement parseJson(String name, String value) {
try {
return jsonParser.parse( value );
}
catch (JsonParseException e) {
throw LOG.invalidAnalysisDefinitionJsonParameter( factoryClass, name, e.getLocalizedMessage(), e );
}
}
@Override
public String toString() {
return new StringBuilder( getClass().getSimpleName() )
.append( "[" )
.append( "targetClass = " ).append( targetClass )
.append( "]" )
.toString();
}
}