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

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

/**
 * @author Matthieu Casanova
 */
public class BinaryExpression extends OperatorExpression {

  /** The two expressions. */
  public Expression left,right;

  public BinaryExpression(final Expression left,
                          final Expression right,
                          final int operator) {
    super(operator, left.sourceStart, right.sourceEnd);
    this.left = left;
    this.right = right;
  }

  public String toStringExpression() {
    final StringBuffer buff = new StringBuffer(left.toStringExpression());
    buff.append(operatorToString());
    buff.append(right.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(left.getModifiedVariable());
    list.addAll(right.getModifiedVariable());
    return list;
  }

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

}