| /* |
| * 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; |
| |
| public class LOStream extends LogicalRelationalOperator { |
| |
| 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 boolean castInserted = false; |
| |
| 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 (isCastInserted()) { |
| schema = new LogicalSchema(); |
| for (int i=0;i<scriptSchema.size();i++) { |
| LogicalSchema.LogicalFieldSchema fs = scriptSchema.getField(i).deepCopy(); |
| fs.type = DataType.BYTEARRAY; |
| schema.addField(fs); |
| } |
| } else { |
| if (scriptSchema!=null) |
| schema = scriptSchema.deepCopy(); |
| } |
| |
| if (schema!=null) |
| uidOnlySchema = schema.mergeUid(uidOnlySchema); |
| |
| return schema; |
| } |
| |
| @Override |
| public void accept(PlanVisitor v) throws FrontendException { |
| if (!(v instanceof LogicalRelationalNodesVisitor)) { |
| throw new FrontendException("Expected LogicalPlanVisitor", 2223); |
| } |
| ((LogicalRelationalNodesVisitor)v).visit(this); |
| } |
| |
| @Override |
| public boolean isEqual(Operator other) throws FrontendException { |
| if (other != null && other instanceof LOStream) { |
| return checkEquality((LogicalRelationalOperator)other); |
| } else { |
| return false; |
| } |
| } |
| |
| public void setCastInserted(boolean flag) { |
| castInserted = flag; |
| } |
| |
| public boolean isCastInserted() { |
| return castInserted; |
| } |
| |
| @Override |
| public void resetUid() { |
| uidOnlySchema = null; |
| } |
| |
| public LogicalSchema getScriptSchema() { |
| return scriptSchema; |
| } |
| } |