com.samskivert.depot.impl.operator.LessThanEquals Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of depot Show documentation

A library for relational-database-based persistence in Java.

There is a newer version: 1.7.5

//
// Depot library - a Java relational persistence library
// https://github.com/threerings/depot/blob/master/LICENSE

package com.samskivert.depot.impl.operator;

import com.samskivert.depot.expression.SQLExpression;

/**
 * The SQL '<=' operator.
 */
public class LessThanEquals extends BinaryOperator
{
    public LessThanEquals (SQLExpression column, Comparable value)
    {
        super(column, value);
    }

    public LessThanEquals (SQLExpression column, SQLExpression value)
    {
        super(column, value);
    }

    @Override // from BinaryOperator
    public String operator()
    {
        return "<=";
    }

    @Override // from BinaryOperator
    public Object evaluate (Object left, Object right)
    {
        if (all(NUMERICAL, left, right)) {
            return NUMERICAL.apply(left) <= NUMERICAL.apply(right);
        }
        if (all(STRING, left, right) || all(DATE, left, right)) {
            return compare(STRING, left, right) <= 0;
        }
        return new NoValue("Non-comparable operand to '<=': (" + left + ", " + right + ")");
    }
}