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package org.apache.olingo.odata2.api.uri.expression;

/**
 * Represents a unary expression node in the expression tree
 * <br>
 * <br>
 * <p>A unary expression node is inserted in the expression tree for any valid
 * ODATA unary operator in {@link UnaryOperator} (e.g. for "not or "-" )
 * <br>
 * <br>
 * 
 */
public interface UnaryExpression extends CommonExpression {

  /**
   * @return Returns the operator object that represents the used operator
   * @see UnaryOperator
   */
  public UnaryOperator getOperator();

  /**
   * @return Returns the expression node of the operand of the unary operator
   * @see CommonExpression
   */
  public CommonExpression getOperand();

}