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

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

/**
 * an echo statement.
 * echo something;
 * @author Matthieu Casanova
 */
public class EchoStatement extends Statement {

  /** An array of expressions in this echo statement. */
  public Expression[] expressions;

  public EchoStatement (final Expression[] expressions, final int sourceStart, final int sourceEnd) {
    super(sourceStart, sourceEnd);
    this.expressions = expressions;
  }

  public String toString() {
    final StringBuffer buff = new StringBuffer("echo ");//$NON-NLS-1$
    for (int i = 0; i < expressions.length; i++) {
      if (i != 0) {
        buff.append(", ");//$NON-NLS-1$
      }
      buff.append(expressions[i].toStringExpression());
    }
    return buff.toString();
  }

  /**
   * Return the object into String.
   * @param tab how many tabs (not used here
   * @return a String
   */
  public String toString(final int tab) {
    final String tabs = tabString(tab);
    final String str = toString();
    final StringBuffer buff = new StringBuffer(tabs.length()+str.length());
    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 < expressions.length; i++) {
      list.addAll(expressions[i].getOutsideVariable());
    }
    return list;
  }

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

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