UnaryExpression.java

/*
 * Copyright (C) 2014 Indeed Inc.
 *
 * 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.
 */
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 * Copyright (C) Codehaus.org                                                *
 * ------------------------------------------------------------------------- *
 * 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                                   *
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 * http://www.apache.org/licenses/LICENSE-2.0                                *
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 * Unless required by applicable law or agreed to in writing, software       *
 * distributed under the License is distributed on an "AS IS" BASIS,         *
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package com.indeed.imhotep.sql.ast;

/**
 * Models an expression with unary operator.
 * 
 * @author Ben Yu
 */
public final class UnaryExpression extends ValueObject implements Expression {
  public final Expression operand;
  public final Op operator;
  
  public UnaryExpression(Op operator, Expression operand) {
    this.operand = operand;
    this.operator = operator;
  }

    @Override
    public <Z> Z match(Matcher<Z> matcher) {
        return matcher.unaryExpression(operator, operand);
    }
}