org.tensorics.core.expressions.UnaryOperationExpression Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of tensorics-core Show documentation

Tensorics is a java framework which uses a tensor as a central object. A tensor represents a set of values placed in an N-dimensional space. Wherever you are tempted to use maps of maps, a tensor might be a good choice ;-) Tensorics provides methods to create, transform and performing calculations with those tensors.

There is a newer version: 0.0.81

Show newest version

// @formatter:off
 /*******************************************************************************
 *
 * This file is part of tensorics.
 * 
 * Copyright (c) 2008-2011, CERN. All rights reserved.
 *
 * 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.
 * 
 ******************************************************************************/
// @formatter:on
package org.tensorics.core.expressions;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.List;

import org.tensorics.core.math.operations.UnaryOperation;
import org.tensorics.core.tree.domain.AbstractDeferredExpression;
import org.tensorics.core.tree.domain.Expression;
import org.tensorics.core.tree.domain.Node;

import com.google.common.collect.ImmutableList;

/**
 * An unresolved expression, which can be resolved by a corresponding resolver by evaluating an unary operation. The
 * information it contains for the resolver, are the operation itself and an expression for the single operand on whose
 * resolved result the unary operation shall be performed.
 * 
 * @author kfuchsbe
 * @param  the type of the unary operand on which to perform the unary operation
 */
public class UnaryOperationExpression extends AbstractDeferredExpression {

    private final UnaryOperation operation;
    private final Expression operand;

    public UnaryOperationExpression(UnaryOperation operation, Expression operand) {
        super();
        this.operation = checkNotNull(operation, "Operation must not be null!");
        this.operand = checkNotNull(operand, "Operand must not be null!");
    }

    public UnaryOperation getOperation() {
        return operation;
    }

    public Expression getOperand() {
        return operand;
    }

    @Override
    public List getChildren() {
        return ImmutableList. of(operand);
    }

}