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path: root/src/main/java/pl/edu/mimuw/cloudatlas/interpreter/ResultSingle.java
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/**
 * Copyright (c) 2014, University of Warsaw
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
 * with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package pl.edu.mimuw.cloudatlas.interpreter;

import java.util.ArrayList;
import java.util.List;

import pl.edu.mimuw.cloudatlas.model.Type;
import pl.edu.mimuw.cloudatlas.model.Value;
import pl.edu.mimuw.cloudatlas.model.ValueBoolean;
import pl.edu.mimuw.cloudatlas.model.ValueList;

class ResultSingle extends Result {
    private final Value value;

    public ResultSingle(Value value) {
        this.value = value;
    }

    @Override
    protected ResultSingle binaryOperationTyped(BinaryOperation operation, ResultSingle right) {
        return new ResultSingle(operation.perform(value, right.value));
    }

    @Override
    protected ResultColumn binaryOperationTyped(BinaryOperation operation, ResultColumn right) {
        List<Value> results = new ArrayList<Value>();

        for (Value value : right.getColumn()) {
            results.add(operation.perform(this.value, value));
        }

        return new ResultColumn(results);
    }

    @Override
    public ResultSingle unaryOperation(UnaryOperation operation) {
        return new ResultSingle(operation.perform(value));
    }

    @Override
    protected Result callMe(BinaryOperation operation, Result left) {
        return left.binaryOperationTyped(operation, this);
    }

    @Override
    public Value getValue() {
        return value;
    }

    @Override
    public ValueList getList() {
        throw new UnsupportedOperationException("Not a ResultList.");
    }

    @Override
    public ValueList getColumn() {
        throw new UnsupportedOperationException("Not a ResultColumn.");
    }

    @Override
    public Result filterNulls() {
        throw new UnsupportedOperationException("Operation filterNulls not supported on ResultSingle.");
    }

    @Override
    public Result first(int size) {
        throw new UnsupportedOperationException("Operation first not supported on ResultSingle.");
    }

    @Override
    public Result last(int size) {
        throw new UnsupportedOperationException("Operation last not supported on ResultSingle.");
    }

    @Override
    public Result random(int size) {
        throw new UnsupportedOperationException("Operation random not supported on ResultSingle.");
    }

    @Override
    public ResultSingle convertTo(Type to) {
        return new ResultSingle(value.convertTo(to));
    }

    @Override
    public ResultSingle isNull() {
        return new ResultSingle(new ValueBoolean(value.isNull()));
    }

    @Override
    public Type getType() {
        return value.getType();
    }
}