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


/**
 * An argument declaration.
 * 
 * @author Matthieu Casanova
 */
public final class ArgumentDeclaration extends VariableDeclaration {

  /**
   * Create an argument.
   * 
   * @param name           the name
   * @param reference      the variable is a reference ?
   * @param initialization the initialization
   * @param sourceStart    the start point
   */
  public ArgumentDeclaration(final Variable name,
                             final boolean reference,
                             final Expression initialization,
                             final int sourceStart) {
    super(name, initialization, VariableDeclaration.EQUAL, sourceStart);
    this.reference = reference;
  }

  /**
   * Create an argument.
   * 
   * @param name        the name
   * @param reference   the variable is a reference ?
   * @param sourceStart the start point
   */
  public ArgumentDeclaration(final Variable name,
                             final boolean reference,
                             final int sourceStart) {
    super(name, sourceStart);
    this.reference = reference;
  }

  /**
   * Return the expression as String.
   * 
   * @return the expression
   */
  public String toStringExpression() {
    if (initialization == null) {
      if (reference) {
        return '&' + variable.toStringExpression();
      } else {
        return variable.toStringExpression();
      }
    } else {
      final String variableString = variable.toStringExpression();
      final String initializationString = initialization.toStringExpression();
      final StringBuffer buff = new StringBuffer(4 +
                                                 variableString.length() +
                                                 initializationString.length());
      if (reference) {
        buff.append('&');
      }
      buff.append(variableString);
      buff.append(" = ");
      buff.append(initializationString);
      return buff.toString();
    }
  }
}