/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.epl.spec;
import com.espertech.esper.epl.table.mgmt.TableMetadata;
/**
* Mirror class to {@link SelectClauseStreamRawSpec} but added the stream number for the name.
*/
public class SelectClauseStreamCompiledSpec implements SelectClauseElementCompiled {
private final String streamName;
private final String optionalColumnName;
private int streamNumber = -1;
private boolean isFragmentEvent = false;
private boolean isProperty = false;
private Class propertyType;
private TableMetadata tableMetadata;
/**
* Ctor.
*
* @param streamName is the stream name of the stream to select
* @param optionalColumnName is the column name
*/
public SelectClauseStreamCompiledSpec(String streamName, String optionalColumnName) {
this.streamName = streamName;
this.optionalColumnName = optionalColumnName;
}
/**
* Returns the stream name (e.g. select streamName from MyEvent as streamName).
*
* @return name
*/
public String getStreamName() {
return streamName;
}
/**
* Returns the column name.
*
* @return name
*/
public String getOptionalName() {
return optionalColumnName;
}
/**
* Returns the stream number of the stream for the stream name.
*
* @return stream number
*/
public int getStreamNumber() {
if (streamNumber == -1) {
throw new IllegalStateException("Not initialized for stream number and tagged event");
}
return streamNumber;
}
/**
* Returns true to indicate that we are meaning to select a tagged event in a pattern, or false if
* selecting an event from a stream.
*
* @return true for tagged event in pattern, false for stream
*/
public boolean isFragmentEvent() {
if (streamNumber == -1) {
throw new IllegalStateException("Not initialized for stream number and tagged event");
}
return isFragmentEvent;
}
/**
* Sets the stream number of the selected stream within the context of the from-clause.
*
* @param streamNumber to set
*/
public void setStreamNumber(int streamNumber) {
this.streamNumber = streamNumber;
}
/**
* Sets a flag indicating whether the stream wildcard is for a tagged event in a pattern.
*
* @param taggedEvent in pattern
*/
public void setFragmentEvent(boolean taggedEvent) {
isFragmentEvent = taggedEvent;
}
/**
* Sets an indicate that a property was selected with wildcard.
*
* @param property selected
* @param propertyType the return type
*/
public void setProperty(boolean property, Class propertyType) {
this.isProperty = property;
this.propertyType = propertyType;
}
/**
* True if selecting from a property, false if not
*
* @return indicator whether property or not
*/
public boolean isProperty() {
return isProperty;
}
/**
* Returns property type.
*
* @return property type
*/
public Class getPropertyType() {
return propertyType;
}
public TableMetadata getTableMetadata() {
return tableMetadata;
}
public void setTableMetadata(TableMetadata tableMetadata) {
this.tableMetadata = tableMetadata;
}
}