org.kitesdk.morphline.stdlib.Pipe Maven / Gradle / Ivy
/*
* 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 org.kitesdk.morphline.stdlib;
import java.util.Arrays;
import java.util.List;
import org.kitesdk.morphline.api.Command;
import org.kitesdk.morphline.api.CommandBuilder;
import org.kitesdk.morphline.api.MorphlineContext;
import org.kitesdk.morphline.base.AbstractCommand;
import com.typesafe.config.Config;
/**
* A morphline has a name and contains a chain of zero or more commands, through which the morphline
* pipes each input record. A command transforms the record into zero or more records.
*/
final class Pipe extends AbstractCommand {
private final String id;
private final Command realChild;
public Pipe(CommandBuilder builder, Config config, Command parent, Command child, MorphlineContext context) {
super(builder, config, parent, child, context);
this.id = getConfigs().getString(config, "id");
List importCommandSpecs = getConfigs().getStringList(config, "importCommands",
Arrays.asList("com.**", "org.**", "net.**"));
context.importCommandBuilders(importCommandSpecs);
getConfigs().getConfigList(config, "commands", null);
List childCommands = buildCommandChain(config, "commands", child, false);
if (childCommands.size() > 0) {
this.realChild = childCommands.get(0);
} else {
this.realChild = child;
}
validateArguments();
}
@Override
protected Command getChild() {
return realChild;
}
}