Computation.java

package net.iplantevin.ql.ast.statements;

import net.iplantevin.ql.ast.LineInfo;
import net.iplantevin.ql.ast.expressions.Expression;
import net.iplantevin.ql.ast.expressions.literals.ID;
import net.iplantevin.ql.ast.expressions.literals.Str;
import net.iplantevin.ql.ast.types.Type;
import net.iplantevin.ql.ast.visitors.IStatementVisitor;

/**
 * Computed question. In addition to name, label and type, also has an Expression.
 *
 * @author Ivan
 */
public class Computation extends Questionable {
    private final Expression expression;

    public Computation(ID identifier, Str label, Type type, Expression expression, LineInfo lineInfo) {
        super(identifier, label, type, lineInfo);

        this.expression = expression;
    }

    public Expression getExpression() {
        return expression;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        if (! super.equals(o)) return false;

        Computation that = (Computation) o;

        if (!expression.equals(that.expression)) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = super.hashCode();
        result = 31 * result + expression.hashCode();
        return result;
    }

    @Override
    public String toString() {
        return super.toString() + "(" + expression.toString() + ")\n";
    }

    @Override
    public <T> T accept(IStatementVisitor<T> visitor) {
        return visitor.visit(this);
    }
}