/*
* Copyright (C) 2015 Stratio (http://stratio.com)
*
* 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.stratio.morphlines.nlp;
import java.util.Collection;
import java.util.Collections;
import org.apache.tika.language.LanguageIdentifier;
import org.kitesdk.morphline.api.Command;
import org.kitesdk.morphline.api.CommandBuilder;
import org.kitesdk.morphline.api.MorphlineContext;
import org.kitesdk.morphline.api.Record;
import org.kitesdk.morphline.base.AbstractCommand;
import com.typesafe.config.Config;
public class LanguageExtractorBuilder implements CommandBuilder {
private final static String COMMAND_NAME = "languageExtractor";
public Collection<String> getNames() {
return Collections.singletonList(COMMAND_NAME);
}
public Command build(Config config, Command parent, Command child,
MorphlineContext context) {
return new LanguageExtractor(this, config, parent, child, context);
}
private static final class LanguageExtractor extends AbstractCommand {
private final static String INPUT_FIELD = "input";
private final static String OUTPUT_FIELD = "output";
private final String inputFieldName;
private final String outputFieldName;
public LanguageExtractor(CommandBuilder builder, Config config,
Command parent, Command child, final MorphlineContext context) {
super(builder, config, parent, child, context);
this.inputFieldName = getConfigs().getString(config, INPUT_FIELD);
this.outputFieldName = getConfigs().getString(config, OUTPUT_FIELD);
validateArguments();
}
@Override
protected boolean doProcess(Record record) {
Object value = record.get(inputFieldName).get(0);
LanguageIdentifier li = new LanguageIdentifier((String) value);
record.put(outputFieldName, li.getLanguage());
// pass record to next command in chain:
return super.doProcess(record);
}
}
}