/**
 * Copyright © 2016, University of Washington
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 *
 *     * Neither the name of the University of Washington nor the names
 *       of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written
 *       permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UNIVERSITY OF
 * WASHINGTON BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package edu.uw.apl.tupelo.store.tools;

import java.io.IOException;
import java.util.Collection;

import edu.uw.apl.tupelo.store.Store;
import edu.uw.apl.tupelo.model.ManagedDiskDescriptor;

/**
 * Various utilities for interrogation of a Tupelo store contents
 */

public class Utils {

	static ManagedDiskDescriptor locateDescriptor( Store s,
												   String diskID,
												   String sessionID )
		throws IOException {
		for( ManagedDiskDescriptor mdd : s.enumerate() ) {
			if( mdd.getDiskID().equals( diskID ) &&
				mdd.getSession().toString().equals( sessionID ) ) {
				return mdd;
			}
		}
		return null;
	}
	
	static boolean isAttributePresent( Store s,
									   ManagedDiskDescriptor mdd,
									   String needle ) throws IOException {
		Collection<String> haystack = s.listAttributes( mdd );
		for( String attrName : haystack ) {
			if( attrName.equals( needle ) )
				return true;
		}
		return false;
	}
}

// eof

