algebricks/algebricks-core/src/main/java/edu/uci/ics/hyracks/algebricks/core/algebra/typing/OpRefTypeEnvPointer.java

/*
 * Copyright 2009-2013 by The Regents of the University of California
 * 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 from
 * 
 *     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 edu.uci.ics.hyracks.algebricks.core.algebra.typing;

import org.apache.commons.lang3.mutable.Mutable;

import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;

public class OpRefTypeEnvPointer implements ITypeEnvPointer {

    private final Mutable<ILogicalOperator> op;
    private final ITypingContext ctx;

    public OpRefTypeEnvPointer(Mutable<ILogicalOperator> op, ITypingContext ctx) {
        this.op = op;
        this.ctx = ctx;
    }

    @Override
    public IVariableTypeEnvironment getTypeEnv() {
        return ctx.getOutputTypeEnvironment(op.getValue());
    }

    @Override
    public String toString() {
        return this.getClass().getName() + ":" + op;
    }

}