/*
 * @(#)InQueryExp.java	4.19 03/12/19
 * 
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.management;


/**
 * This class is used by the query-building mechanism to represent binary
 * operations.
 * @serial include
 *
 * @since 1.5
 */
class InQueryExp extends QueryEval implements QueryExp { 

    /* Serial version */
    private static final long serialVersionUID = -5801329450358952434L;

    /** 
     * @serial The {@link ValueExp} to be found 
     */
    private ValueExp val;

    /** 
     * @serial The array of {@link ValueExp} to be searched 
     */
    private ValueExp[]  valueList;


    /**
     * Basic Constructor.
     */
    public InQueryExp() { 
    } 
    
    /**
     * Creates a new InQueryExp with the specified ValueExp to be found in
     * a specified array of ValueExp.
     */
    public InQueryExp(ValueExp v1, ValueExp items[]) { 
	val	  = v1;
	valueList = items;
    } 
    

    /**
     * Returns the checked value of the query.
     */       
    public ValueExp getCheckedValue()  { 
	return val;
    } 
    
    /**
     * Returns the array of values of the query.
     */
    public ValueExp[] getExplicitValues()  { 
	return valueList;
    } 

    /**
     * Applies the InQueryExp on a MBean.
     *
     * @param name The name of the MBean on which the InQueryExp will be applied.
     *
     * @return  True if the query was successfully applied to the MBean, false otherwise.
     *
     * @exception BadStringOperationException
     * @exception BadBinaryOpValueExpException
     * @exception BadAttributeValueExpException 
     * @exception InvalidApplicationException
     */
    public boolean apply(ObjectName name) throws BadStringOperationException, BadBinaryOpValueExpException,
	BadAttributeValueExpException, InvalidApplicationException  { 
	if (valueList != null) {
	    ValueExp v	    = val.apply(name);
	    boolean numeric = v instanceof NumericValueExp;
	    
	    for (int i = 0; i < valueList.length; i++) {
		if (numeric) {
		    if (((NumericValueExp)valueList[i]).doubleValue() ==
			((NumericValueExp)v).doubleValue()) {
			return true;
		    }
		} else {
		    if (((StringValueExp)valueList[i]).getValue().equals(
			((StringValueExp)v).getValue())) {
			return true;
		    }
		}
	    }
	}	
	return false;
    } 

    /**
     * Returns the string representing the object.
     */
    public String toString()  { 
	return val + " in (" + generateValueList() + ")";
    } 


    private String generateValueList() {
	if (valueList == null || valueList.length == 0) {
	    return "";
	}
	
	StringBuffer result = new StringBuffer(valueList[0].toString());
	
	for (int i = 1; i < valueList.length; i++) {
	    result.append(", ");
	    result.append(valueList[i]);
	}
	
	return result.toString();
    }
 
 }