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Calcite APIs for LINQ (Language-Integrated Query) in Java
/*
* 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.calcite.linq4j.tree;
import java.lang.reflect.Type;
import java.util.Objects;
/**
* Represents an expression that has a binary operator.
*/
public class BinaryExpression extends Expression {
public final Expression expression0;
public final Expression expression1;
private final Primitive primitive;
BinaryExpression(ExpressionType nodeType, Type type, Expression expression0,
Expression expression1) {
super(nodeType, type);
assert expression0 != null : "expression0 should not be null";
assert expression1 != null : "expression1 should not be null";
this.expression0 = expression0;
this.expression1 = expression1;
this.primitive = Primitive.of(expression0.getType());
}
@Override public Expression accept(Shuttle visitor) {
visitor = visitor.preVisit(this);
Expression expression0 = this.expression0.accept(visitor);
Expression expression1 = this.expression1.accept(visitor);
return visitor.visit(this, expression0, expression1);
}
public R accept(Visitor visitor) {
return visitor.visit(this);
}
public Object evaluate(Evaluator evaluator) {
switch (nodeType) {
case AndAlso:
return (Boolean) expression0.evaluate(evaluator)
&& (Boolean) expression1.evaluate(evaluator);
case Add:
switch (primitive) {
case INT:
return evaluateInt(expression0, evaluator) + evaluateInt(expression1, evaluator);
case SHORT:
return evaluateShort(expression0, evaluator) + evaluateShort(expression1, evaluator);
case BYTE:
return evaluateByte(expression0, evaluator) + evaluateByte(expression1, evaluator);
case FLOAT:
return evaluateFloat(expression0, evaluator) + evaluateFloat(expression1, evaluator);
case DOUBLE:
return evaluateDouble(expression0, evaluator) + evaluateDouble(expression1, evaluator);
case LONG:
return evaluateLong(expression0, evaluator) + evaluateLong(expression1, evaluator);
default:
throw cannotEvaluate();
}
case Divide:
switch (primitive) {
case INT:
return evaluateInt(expression0, evaluator) / evaluateInt(expression1, evaluator);
case SHORT:
return evaluateShort(expression0, evaluator) / evaluateShort(expression1, evaluator);
case BYTE:
return evaluateByte(expression0, evaluator) / evaluateByte(expression1, evaluator);
case FLOAT:
return evaluateFloat(expression0, evaluator) / evaluateFloat(expression1, evaluator);
case DOUBLE:
return evaluateDouble(expression0, evaluator) / evaluateDouble(expression1, evaluator);
case LONG:
return evaluateLong(expression0, evaluator) / evaluateLong(expression1, evaluator);
default:
throw cannotEvaluate();
}
case Equal:
return expression0.evaluate(evaluator)
.equals(expression1.evaluate(evaluator));
case GreaterThan:
switch (primitive) {
case INT:
return evaluateInt(expression0, evaluator) > evaluateInt(expression1, evaluator);
case SHORT:
return evaluateShort(expression0, evaluator) > evaluateShort(expression1, evaluator);
case BYTE:
return evaluateByte(expression0, evaluator) > evaluateByte(expression1, evaluator);
case FLOAT:
return evaluateFloat(expression0, evaluator) > evaluateFloat(expression1, evaluator);
case DOUBLE:
return evaluateDouble(expression0, evaluator) > evaluateDouble(expression1, evaluator);
case LONG:
return evaluateLong(expression0, evaluator) > evaluateLong(expression1, evaluator);
default:
throw cannotEvaluate();
}
case GreaterThanOrEqual:
switch (primitive) {
case INT:
return evaluateInt(expression0, evaluator) >= evaluateInt(expression1, evaluator);
case SHORT:
return evaluateShort(expression0, evaluator) >= evaluateShort(expression1, evaluator);
case BYTE:
return evaluateByte(expression0, evaluator) >= evaluateByte(expression1, evaluator);
case FLOAT:
return evaluateFloat(expression0, evaluator) >= evaluateFloat(expression1, evaluator);
case DOUBLE:
return evaluateDouble(expression0, evaluator) >= evaluateDouble(expression1, evaluator);
case LONG:
return evaluateLong(expression0, evaluator) >= evaluateLong(expression1, evaluator);
default:
throw cannotEvaluate();
}
case LessThan:
switch (primitive) {
case INT:
return evaluateInt(expression0, evaluator) < evaluateInt(expression1, evaluator);
case SHORT:
return evaluateShort(expression0, evaluator) < evaluateShort(expression1, evaluator);
case BYTE:
return evaluateByte(expression0, evaluator) < evaluateByte(expression1, evaluator);
case FLOAT:
return evaluateFloat(expression0, evaluator) < evaluateFloat(expression1, evaluator);
case DOUBLE:
return evaluateDouble(expression0, evaluator) < evaluateDouble(expression1, evaluator);
case LONG:
return evaluateLong(expression0, evaluator) < evaluateLong(expression1, evaluator);
default:
throw cannotEvaluate();
}
case LessThanOrEqual:
switch (primitive) {
case INT:
return evaluateInt(expression0, evaluator) <= evaluateInt(expression1, evaluator);
case SHORT:
return evaluateShort(expression0, evaluator) <= evaluateShort(expression1, evaluator);
case BYTE:
return evaluateByte(expression0, evaluator) <= evaluateByte(expression1, evaluator);
case FLOAT:
return evaluateFloat(expression0, evaluator) <= evaluateFloat(expression1, evaluator);
case DOUBLE:
return evaluateDouble(expression0, evaluator) <= evaluateDouble(expression1, evaluator);
case LONG:
return evaluateLong(expression0, evaluator) <= evaluateLong(expression1, evaluator);
default:
throw cannotEvaluate();
}
case Multiply:
switch (primitive) {
case INT:
return evaluateInt(expression0, evaluator) * evaluateInt(expression1, evaluator);
case SHORT:
return evaluateShort(expression0, evaluator) * evaluateShort(expression1, evaluator);
case BYTE:
return evaluateByte(expression0, evaluator) * evaluateByte(expression1, evaluator);
case FLOAT:
return evaluateFloat(expression0, evaluator) * evaluateFloat(expression1, evaluator);
case DOUBLE:
return evaluateDouble(expression0, evaluator) * evaluateDouble(expression1, evaluator);
case LONG:
return evaluateLong(expression0, evaluator) * evaluateLong(expression1, evaluator);
default:
throw cannotEvaluate();
}
case NotEqual:
return !expression0.evaluate(evaluator)
.equals(expression1.evaluate(evaluator));
case OrElse:
return (Boolean) expression0.evaluate(evaluator)
|| (Boolean) expression1.evaluate(evaluator);
case Subtract:
switch (primitive) {
case INT:
return evaluateInt(expression0, evaluator) - evaluateInt(expression1, evaluator);
case SHORT:
return evaluateShort(expression0, evaluator) - evaluateShort(expression1, evaluator);
case BYTE:
return evaluateByte(expression0, evaluator) - evaluateByte(expression1, evaluator);
case FLOAT:
return evaluateFloat(expression0, evaluator) - evaluateFloat(expression1, evaluator);
case DOUBLE:
return evaluateDouble(expression0, evaluator) - evaluateDouble(expression1, evaluator);
case LONG:
return evaluateLong(expression0, evaluator) - evaluateLong(expression1, evaluator);
default:
throw cannotEvaluate();
}
default:
throw cannotEvaluate();
}
}
void accept(ExpressionWriter writer, int lprec, int rprec) {
if (writer.requireParentheses(this, lprec, rprec)) {
return;
}
expression0.accept(writer, lprec, nodeType.lprec);
writer.append(nodeType.op);
expression1.accept(writer, nodeType.rprec, rprec);
}
private RuntimeException cannotEvaluate() {
return new RuntimeException("cannot evaluate " + this + ", nodeType="
+ nodeType + ", primitive=" + primitive);
}
private int evaluateInt(Expression expression, Evaluator evaluator) {
return ((Number) expression.evaluate(evaluator)).intValue();
}
private short evaluateShort(Expression expression, Evaluator evaluator) {
return ((Number) expression.evaluate(evaluator)).shortValue();
}
private long evaluateLong(Expression expression, Evaluator evaluator) {
return ((Number) expression.evaluate(evaluator)).longValue();
}
private byte evaluateByte(Expression expression, Evaluator evaluator) {
return ((Number) expression.evaluate(evaluator)).byteValue();
}
private float evaluateFloat(Expression expression, Evaluator evaluator) {
return ((Number) expression.evaluate(evaluator)).floatValue();
}
private double evaluateDouble(Expression expression, Evaluator evaluator) {
return ((Number) expression.evaluate(evaluator)).doubleValue();
}
@Override public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
if (!super.equals(o)) {
return false;
}
BinaryExpression that = (BinaryExpression) o;
if (!expression0.equals(that.expression0)) {
return false;
}
if (!expression1.equals(that.expression1)) {
return false;
}
if (primitive != that.primitive) {
return false;
}
return true;
}
@Override public int hashCode() {
return Objects.hash(nodeType, type, expression0, expression1, primitive);
}
}