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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.

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// @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.iterable.expressions;

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

import java.util.List;

import org.tensorics.core.math.predicates.BinaryPredicate;
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 applying a binary predicate on the results of the two operands
 * (left, right). Any instance contains the binary predicate itself as well as expressions for both operands.
 *
 * @param  the type of the results of the operands
 * @author caguiler
 */
public class BinaryPredicateIterableExpression extends AbstractDeferredExpression {

    private final BinaryPredicate predicate;
    private final Expression> left;
    private final Expression right;

    public BinaryPredicateIterableExpression(BinaryPredicate predicate, Expression> left, Expression right) {
        super();
        this.predicate = checkNotNull(predicate, "Predicate must not be null!");
        this.left = checkNotNull(left, "Left operand must not be null!");
        this.right = checkNotNull(right, "Right operand must not be null!");
    }

    public BinaryPredicate getPredicate() {
        return predicate;
    }

    public Expression> getLeft() {
        return left;
    }

    public Expression getRight() {
        return right;
    }

    @Override
    public List getChildren() {
        return ImmutableList.of(left, right);
    }

}