org.apache.pig.newplan.logical.relational.LOStream Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.pig.newplan.logical.relational;
import org.apache.pig.data.DataType;
import org.apache.pig.impl.logicalLayer.FrontendException;
import org.apache.pig.impl.streaming.ExecutableManager;
import org.apache.pig.impl.streaming.StreamingCommand;
import org.apache.pig.newplan.Operator;
import org.apache.pig.newplan.PlanVisitor;
import org.apache.pig.newplan.logical.relational.LOLoad.CastState;
public class LOStream extends LogicalRelationalOperator {
public enum CastState {INSERTED, NONEED, NOADJUST};
private LogicalSchema scriptSchema;
private static final long serialVersionUID = 2L;
//private static Log log = LogFactory.getLog(LOFilter.class);
// the StreamingCommand object for the
// Stream Operator this operator represents
private StreamingCommand command;
transient private ExecutableManager executableManager;
private LogicalSchema uidOnlySchema;
private CastState castState = CastState.NOADJUST;
public LOStream(LogicalPlan plan, ExecutableManager exeManager, StreamingCommand cmd, LogicalSchema schema) {
super("LOStream", plan);
command = cmd;
executableManager = exeManager;
scriptSchema = schema;
}
/**
* Get the StreamingCommand object associated
* with this operator
*
* @return the StreamingCommand object
*/
public StreamingCommand getStreamingCommand() {
return command;
}
/**
* @return the ExecutableManager
*/
public ExecutableManager getExecutableManager() {
return executableManager;
}
@Override
public LogicalSchema getSchema() throws FrontendException {
if (schema!=null)
return schema;
if (isCastAdjusted()) {
schema = new LogicalSchema();
for (int i=0;i