package net.sourceforge.phpdt.internal.compiler.ast;

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

/**
 * A ConditionalExpression is like that : booleanExpression ? trueValue : falseValue;
 * @author Matthieu Casanova
 */
public class ConditionalExpression extends OperatorExpression {

  public Expression condition, valueIfTrue, valueIfFalse;

  public ConditionalExpression(final Expression condition,
                               final Expression valueIfTrue,
                               final Expression valueIfFalse) {
    super(-1, condition.sourceStart, valueIfFalse.sourceEnd);
    this.condition = condition;
    this.valueIfTrue = valueIfTrue;
    this.valueIfFalse = valueIfFalse;
  }

  public String toStringExpression() {
    final StringBuffer buff = new StringBuffer("(");
    buff.append(condition.toStringExpression());
    buff.append(") ? ");
    buff.append(valueIfTrue.toStringExpression());
    buff.append(" : ");
    buff.append(valueIfFalse.toStringExpression());
    return buff.toString();
  }

  /**
   * Get the variables from outside (parameters, globals ...)
   * @return the variables from outside
   */
  public List getOutsideVariable() {
    return new ArrayList();
  }

  /**
   * get the modified variables.
   * @return the variables from we change value
   */
  public List getModifiedVariable() {
    final ArrayList list = new ArrayList();
    list.addAll(condition.getModifiedVariable());
    list.addAll(valueIfTrue.getModifiedVariable());
    list.addAll(valueIfFalse.getModifiedVariable());
    return list;
  }

  /**
   * Get the variables used.
   * @return the variables used
   */
  public List getUsedVariable() {
    final ArrayList list = new ArrayList();
    list.addAll(condition.getUsedVariable());
    list.addAll(valueIfTrue.getUsedVariable());
    list.addAll(valueIfFalse.getUsedVariable());
    return list;
  }
}