/*
* 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.misc;
import com.orientechnologies.common.exception.OException;
import com.orientechnologies.orient.core.command.OCommandContext;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.id.ORecordId;
import com.orientechnologies.orient.core.record.ORecord;
import com.orientechnologies.orient.core.record.impl.ORecordBytes;
import com.orientechnologies.orient.core.serialization.OBase64Utils;
import com.orientechnologies.orient.core.serialization.OSerializableStream;
import com.orientechnologies.orient.core.sql.functions.OSQLFunctionAbstract;
/**
* Encode a string in various format (only base64 for now)
*
* @author Johann Sorel (Geomatys)
*/
public class OSQLFunctionEncode extends OSQLFunctionAbstract {
public static final String NAME = "encode";
public static final String FORMAT_BASE64 = "base64";
/**
* Get the date at construction to have the same date for all the iteration.
*/
public OSQLFunctionEncode() {
super(NAME, 2, 2);
}
public Object execute(Object iThis, OIdentifiable iCurrentRecord, Object iCurrentResult, final Object[] iParams,
OCommandContext iContext) {
final Object candidate = iParams[0];
final String format = iParams[1].toString();
byte[] data = null;
if (candidate instanceof byte[]) {
data = (byte[]) candidate;
} else if (candidate instanceof ORecordId) {
final ORecord rec = ((ORecordId) candidate).getRecord();
if (rec instanceof ORecordBytes) {
data = ((ORecordBytes) rec).toStream();
}
} else if (candidate instanceof OSerializableStream) {
data = ((OSerializableStream) candidate).toStream();
}
if (data == null) {
return null;
}
if (FORMAT_BASE64.equalsIgnoreCase(format)) {
return OBase64Utils.encodeBytes(data);
} else {
throw new OException("unknowned format :" + format);
}
}
@Override
public String getSyntax() {
return "encode(<binaryfield>, <format>)";
}
}