/*
* 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.byteCode.expression;
import com.facebook.presto.byteCode.Block;
import com.facebook.presto.byteCode.ByteCodeNode;
import com.facebook.presto.byteCode.instruction.LabelNode;
import com.google.common.collect.ImmutableList;
import java.util.List;
import static com.facebook.presto.byteCode.ParameterizedType.type;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
class AndByteCodeExpression
extends ByteCodeExpression
{
private final ByteCodeExpression left;
private final ByteCodeExpression right;
AndByteCodeExpression(ByteCodeExpression left, ByteCodeExpression right)
{
super(type(boolean.class));
this.left = checkNotNull(left, "left is null");
checkArgument(left.getType().getPrimitiveType() == boolean.class, "Expected left to be type boolean but is %s", left.getType());
this.right = checkNotNull(right, "right is null");
checkArgument(right.getType().getPrimitiveType() == boolean.class, "Expected right to be type boolean but is %s", right.getType());
}
@Override
public ByteCodeNode getByteCode()
{
LabelNode falseLabel = new LabelNode("false");
LabelNode endLabel = new LabelNode("end");
return new Block(null)
.append(left)
.ifFalseGoto(falseLabel)
.append(right)
.ifFalseGoto(falseLabel)
.push(true)
.gotoLabel(endLabel)
.visitLabel(falseLabel)
.push(false)
.visitLabel(endLabel);
}
@Override
public List<ByteCodeNode> getChildNodes()
{
return ImmutableList.<ByteCodeNode>of(left, right);
}
@Override
protected String formatOneLine()
{
return "(" + left + " && " + right + ")";
}
}