com.facebook.presto.jdbc.internal.spi.relation.RowExpression Maven / Gradle / Ivy
/*
* Licensed 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 com.facebook.presto.jdbc.internal.spi.relation;
import com.facebook.presto.jdbc.internal.common.type.Type;
import com.facebook.presto.jdbc.internal.spi.SourceLocation;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonCreator;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonProperty;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonSubTypes;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonTypeInfo;
import java.util.Optional;
@JsonTypeInfo(
use = JsonTypeInfo.Id.NAME,
include = JsonTypeInfo.As.PROPERTY,
property = "@type")
@JsonSubTypes({
@JsonSubTypes.Type(value = CallExpression.class, name = "call"),
@JsonSubTypes.Type(value = SpecialFormExpression.class, name = "special"),
@JsonSubTypes.Type(value = LambdaDefinitionExpression.class, name = "lambda"),
@JsonSubTypes.Type(value = InputReferenceExpression.class, name = "input"),
@JsonSubTypes.Type(value = VariableReferenceExpression.class, name = "variable"),
@JsonSubTypes.Type(value = ConstantExpression.class, name = "constant")})
public abstract class RowExpression
{
private final Optional sourceLocation;
@JsonCreator
public RowExpression(@JsonProperty("sourceLocation") Optional sourceLocation)
{
this.sourceLocation = sourceLocation;
}
public RowExpression()
{
this(Optional.empty());
}
@JsonProperty
public Optional getSourceLocation()
{
return sourceLocation;
}
public abstract Type getType();
@Override
public abstract boolean equals(Object other);
@Override
public abstract int hashCode();
@Override
public abstract String toString();
public abstract R accept(RowExpressionVisitor visitor, C context);
/**
* @return Canonical form of RowExpression by removing non-critical information
* from the node, like source location. Does NOT canonicalize the child expressions.
*/
public abstract RowExpression canonicalize();
}
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