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

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

/**
 * an else statement.
 * it's else
 * @author Matthieu Casanova
 */
public class Else extends Statement {

  /** the statements. */
  public Statement[] statements;

  /**
   * An else statement bad version ( : endif).
   * @param statements the statements
   * @param sourceStart the starting offset
   * @param sourceEnd the ending offset
   */
  public Else(final Statement[] statements,
              final int sourceStart,
              final int sourceEnd) {
    super(sourceStart, sourceEnd);
    this.statements = statements;
  }

  /**
   * An else statement good version
   * @param statement the statement (it could be a block)
   * @param sourceStart the starting offset
   * @param sourceEnd the ending offset
   */
  public Else(final Statement statement,
              final int sourceStart,
              final int sourceEnd) {
    super(sourceStart, sourceEnd);
    this.statements = new Statement[1];
    this.statements[0] = statement;
  }

  /**
   * Return the object into String.
   * @param tab how many tabs (not used here
   * @return a String
   */
  public String toString(final int tab) {
    final StringBuffer buff = new StringBuffer(tabString(tab));
    buff.append("else \n");//$NON-NLS-1$
    Statement statement;
    for (int i = 0; i < statements.length; i++) {
      statement = statements[i];
      buff.append(statement.toString(tab + 1)).append("\n");//$NON-NLS-1$
    }
    return buff.toString();
  }

  /**
   * Get the variables from outside (parameters, globals ...)
   * @return the variables from outside
   */
  public List getOutsideVariable() {
    final ArrayList list = new ArrayList();
    for (int i = 0; i < statements.length; i++) {
      list.addAll(statements[i].getOutsideVariable());
    }
    return list;
  }

  /**
   * get the modified variables.
   * @return the variables from outside
   */
  public List getModifiedVariable() {
    final ArrayList list = new ArrayList();
    for (int i = 0; i < statements.length; i++) {
      list.addAll(statements[i].getModifiedVariable());
    }
    return list;
  }

  /**
   * Get the variables used.
   * @return the variables from outside
   */
  public List getUsedVariable() {
    final ArrayList list = new ArrayList();
    for (int i = 0; i < statements.length; i++) {
      list.addAll(statements[i].getUsedVariable());
    }
    return list;
  }
}