odata2-lib/odata-api/src/main/java/org/apache/olingo/odata2/api/uri/expression/FilterExpression.java

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

/**
 * Represents a $filter expression in the expression tree
 * Used to define the <b>root</b> expression node in an $filter expression tree.
 * 
 * 
 */
public interface FilterExpression extends CommonExpression {

  /**
   * @return Returns the $filter expression string used to build the expression tree
   */
  String getExpressionString();

  /**
   * @return Returns the expression node representing the first <i>operator</i>,<i>method</i>,<i>literal</i> or
   * <i>property</i> of the expression tree
   */
  CommonExpression getExpression();

}