com.orientechnologies.orient.core.sql.functions.text.OSQLMethodToJSON Maven / Gradle / Ivy
/*
* Copyright 2010-2016 OrientDB LTD (http://orientdb.com)
* Copyright 2013 Geomatys.
*
* 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 com.orientechnologies.orient.core.sql.functions.text;
import com.orientechnologies.common.collection.OMultiValue;
import com.orientechnologies.orient.core.command.OCommandContext;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.record.ORecord;
import com.orientechnologies.orient.core.record.impl.ODocument;
import com.orientechnologies.orient.core.sql.executor.OResult;
import com.orientechnologies.orient.core.sql.method.misc.OAbstractSQLMethod;
import java.util.Map;
/**
* Converts a document in JSON string.
*
* @author Johann Sorel (Geomatys)
* @author Luca Garulli (l.garulli--(at)--orientdb.com)
*/
public class OSQLMethodToJSON extends OAbstractSQLMethod {
public static final String NAME = "tojson";
public OSQLMethodToJSON() {
super(NAME, 0, 1);
}
@Override
public String getSyntax() {
return "toJSON([])";
}
@Override
public Object execute(
Object iThis,
OIdentifiable iCurrentRecord,
OCommandContext iContext,
Object ioResult,
Object[] iParams) {
if (iThis == null) {
return null;
}
final String format = iParams.length > 0 ? ((String) iParams[0]).replace("\"", "") : null;
if (iThis instanceof OResult) {
iThis = ((OResult) iThis).toElement();
}
if (iThis instanceof ORecord) {
final ORecord record = (ORecord) iThis;
return iParams.length == 1 ? record.toJSON(format) : record.toJSON();
} else if (iThis instanceof Map) {
final ODocument doc = new ODocument().fromMap((Map) iThis);
return iParams.length == 1 ? doc.toJSON(format) : doc.toJSON();
} else if (OMultiValue.isMultiValue(iThis)) {
StringBuilder builder = new StringBuilder();
builder.append("[");
boolean first = true;
for (Object o : OMultiValue.getMultiValueIterable(iThis, false)) {
if (!first) {
builder.append(",");
}
builder.append(execute(o, iCurrentRecord, iContext, ioResult, iParams));
first = false;
}
builder.append("]");
return builder.toString();
}
return null;
}
}