package org.sigmah.shared.computation.instruction;
/*
* #%L
* Sigmah
* %%
* Copyright (C) 2010 - 2016 URD
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/gpl-3.0.html>.
* #L%
*/
import java.util.Map;
import java.util.Stack;
import org.sigmah.shared.computation.dependency.Dependency;
import org.sigmah.shared.computation.dependency.SingleDependency;
import org.sigmah.shared.computation.value.ComputedValue;
import org.sigmah.shared.dto.element.FlexibleElementDTO;
/**
* Reference an existing flexible element.
*
* @author Raphaƫl Calabro (raphael.calabro@netapsys.fr)
* @since 2.1
*/
public class Variable implements Instruction, HasHumanReadableFormat {
private final Dependency dependency;
public Variable(FlexibleElementDTO flexibleElement) {
this.dependency = new SingleDependency(flexibleElement);
}
public Variable(Dependency dependency) {
this.dependency = dependency;
}
public Dependency getDependency() {
return dependency;
}
/**
* {@inheritDoc}
*/
@Override
public void execute(Stack<ComputedValue> stack, Map<Dependency, ComputedValue> variables) {
stack.push(variables.get(dependency));
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return dependency.toString();
}
/**
* {@inheritDoc}
*/
@Override
public String toHumanReadableString() {
return dependency.toHumanReadableString();
}
}