org.apache.flink.connector.mongodb.table

Class MongoFilterPushDownVisitor

java.lang.Object

org.apache.flink.table.expressions.ExpressionDefaultVisitor<org.bson.BsonValue>

org.apache.flink.connector.mongodb.table.MongoFilterPushDownVisitor

All Implemented Interfaces:

org.apache.flink.table.expressions.ExpressionVisitor<org.bson.BsonValue>

@Experimental
public class MongoFilterPushDownVisitor
extends org.apache.flink.table.expressions.ExpressionDefaultVisitor<org.bson.BsonValue>

Visitor that convert Expression to Bson filter. Return Filters.empty() if we cannot push down the filter.

Field Summary

Fields

Modifier and Type	Field and Description
static MongoFilterPushDownVisitor	INSTANCE

Method Summary

Modifier and Type	Method and Description
protected org.bson.BsonDocument	defaultMethod(org.apache.flink.table.expressions.Expression expression)
org.bson.BsonDocument	visit(org.apache.flink.table.expressions.CallExpression call)
org.bson.BsonString	visit(org.apache.flink.table.expressions.FieldReferenceExpression fieldReference)
org.bson.BsonValue	visit(org.apache.flink.table.expressions.ValueLiteralExpression litExp)

Methods inherited from class org.apache.flink.table.expressions.ExpressionDefaultVisitor

visit, visit, visit

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INSTANCE

public static final MongoFilterPushDownVisitor INSTANCE

Method Detail

visit

public org.bson.BsonDocument visit(org.apache.flink.table.expressions.CallExpression call)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<org.bson.BsonValue>

Overrides:

visit in class org.apache.flink.table.expressions.ExpressionDefaultVisitor<org.bson.BsonValue>

visit

public org.bson.BsonValue visit(org.apache.flink.table.expressions.ValueLiteralExpression litExp)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<org.bson.BsonValue>

Overrides:

visit in class org.apache.flink.table.expressions.ExpressionDefaultVisitor<org.bson.BsonValue>

visit

public org.bson.BsonString visit(org.apache.flink.table.expressions.FieldReferenceExpression fieldReference)

Specified by:

visit in interface org.apache.flink.table.expressions.ExpressionVisitor<org.bson.BsonValue>

Overrides:

visit in class org.apache.flink.table.expressions.ExpressionDefaultVisitor<org.bson.BsonValue>

defaultMethod

protected org.bson.BsonDocument defaultMethod(org.apache.flink.table.expressions.Expression expression)

Specified by:

defaultMethod in class org.apache.flink.table.expressions.ExpressionDefaultVisitor<org.bson.BsonValue>