| package edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical; |
| |
| import java.util.ArrayList; |
| |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalOperatorTag; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.properties.TypePropagationPolicy; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.properties.VariablePropagationPolicy; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.typing.ITypeEnvPointer; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.typing.ITypingContext; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.typing.OpRefTypeEnvPointer; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.typing.PropagatingTypeEnvironment; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.visitors.ILogicalExpressionReferenceTransform; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.visitors.ILogicalOperatorVisitor; |
| import edu.uci.ics.hyracks.algebricks.core.api.exceptions.AlgebricksException; |
| |
| public class SinkOperator extends AbstractLogicalOperator { |
| |
| @Override |
| public void recomputeSchema() throws AlgebricksException { |
| schema = new ArrayList<LogicalVariable>(inputs.get(0).getValue().getSchema()); |
| } |
| |
| @Override |
| public boolean acceptExpressionTransform(ILogicalExpressionReferenceTransform transform) throws AlgebricksException { |
| return false; |
| } |
| |
| @Override |
| public <R, T> R accept(ILogicalOperatorVisitor<R, T> visitor, T arg) throws AlgebricksException { |
| return visitor.visitSinkOperator(this, arg); |
| } |
| |
| @Override |
| public boolean isMap() { |
| return false; |
| } |
| |
| @Override |
| public VariablePropagationPolicy getVariablePropagationPolicy() { |
| return VariablePropagationPolicy.ALL; |
| } |
| |
| @Override |
| public IVariableTypeEnvironment computeOutputTypeEnvironment(ITypingContext ctx) throws AlgebricksException { |
| ITypeEnvPointer[] envPointers = new ITypeEnvPointer[1]; |
| envPointers[0] = new OpRefTypeEnvPointer(inputs.get(0), ctx); |
| PropagatingTypeEnvironment env = new PropagatingTypeEnvironment(ctx.getExpressionTypeComputer(), |
| ctx.getNullableTypeComputer(), ctx.getMetadataProvider(), TypePropagationPolicy.ALL, envPointers); |
| return env; |
| } |
| |
| @Override |
| public LogicalOperatorTag getOperatorTag() { |
| return LogicalOperatorTag.SINK; |
| } |
| |
| } |