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  package org.apache.cayenne.exp.parser;
  
  import org.apache.cayenne.exp.Expression;
  
  /**
   * "Greater Than Or Equal To" expression.
   * 
   * @since 1.1
   */
  public class ASTGreaterOrEqual extends ConditionNode {
  
  	private static final long serialVersionUID = -2926530926896058935L;
  
  	/**
  	 * Constructor used by expression parser. Do not invoke directly.
  	 */
  	ASTGreaterOrEqual(int id) {
  		super(id);
  	}
  
  	public ASTGreaterOrEqual() {
  		super(ExpressionParserTreeConstants.JJTGREATEROREQUAL);
  	}
  
  	public ASTGreaterOrEqual(SimpleNode path, Object value) {
  		super(ExpressionParserTreeConstants.JJTGREATEROREQUAL);
  		jjtAddChild(path, 0);
  		jjtAddChild(new ASTScalar(value), 1);
  		connectChildren();
  	}
  
  	@Override
  	protected int getRequiredChildrenCount() {
  		return 2;
  	}
  
  	@Override
  	protected Boolean evaluateSubNode(Object o, Object[] evaluatedChildren) throws Exception {
  		Object o2 = evaluatedChildren[1];
  		Integer c = Evaluator.evaluator(o).compare(o, o2);
  		if(c == null) {
  			return null;
  		}
  		return c >= 0 ? Boolean.TRUE : Boolean.FALSE;
  	}
  
  	/**
  	 * Creates a copy of this expression node, without copying children.
  	 */
  	@Override
  	public Expression shallowCopy() {
  		return new ASTGreaterOrEqual(id);
  	}
  
  	@Override
  	protected String getExpressionOperator(int index) {
  		return ">=";
  	}
  
  	@Override
  	public int getType() {
  		return Expression.GREATER_THAN_EQUAL_TO;
  	}
  }
  