/*
* Copyright 2013 Cloudera Inc.
*
* 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.cloudera.cdk.morphline.stdlib;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import com.cloudera.cdk.morphline.api.Command;
import com.cloudera.cdk.morphline.api.CommandBuilder;
import com.cloudera.cdk.morphline.api.MorphlineContext;
import com.cloudera.cdk.morphline.api.Record;
import com.cloudera.cdk.morphline.base.AbstractCommand;
import com.cloudera.cdk.morphline.base.Configs;
import com.cloudera.cdk.morphline.base.FieldExpression;
import com.typesafe.config.Config;
/**
* Base class for addValues/setValues/addValuesIfAbsent commands.
*/
abstract class AbstractAddValuesCommand extends AbstractCommand {
private final Set<Map.Entry<String, Object>> entrySet;
public AbstractAddValuesCommand(CommandBuilder builder, Config config, Command parent, Command child, MorphlineContext context) {
super(builder, config, parent, child, context);
entrySet = new Configs().getEntrySet(config);
}
@Override
protected boolean doProcess(Record record) {
for (Map.Entry<String, Object> entry : entrySet) {
String fieldName = entry.getKey();
prepare(record, fieldName);
Object entryValue = entry.getValue();
Collection results;
if (entryValue instanceof Collection) {
results = (Collection)entryValue;
} else {
results = new FieldExpression(entryValue.toString(), getConfig()).evaluate(record);
}
putAll(record, fieldName, results);
}
// pass record to next command in chain:
return super.doProcess(record);
}
protected void prepare(Record record, String key) {
}
protected void putAll(Record record, String key, Collection values) {
record.getFields().putAll(key, values);
}
protected void put(Record record, String key, Object value) {
record.getFields().put(key, value);
}
}