/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 2001, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.apache.xerces.impl.v2;

/**
 * The XML representation for an attribute group declaration
 * schema component is a global <attributeGroup> element information item
 *
 * @author Sandy Gao, IBM
 * @author Rahul Srivastava, Sun Microsystems Inc.
 * @version $Id: XSAttributeGroupDecl.java,v 1.3 2001/09/21 17:57:17 sandygao Exp $
 */
public class XSAttributeGroupDecl {

    // name of the attribute group
    public String fName = null;
    // target namespace of the attribute group
    public String fTargetNamespace = null;
    // number of attribute uses included by this attribute group
    int fAttrUseNum = 0;
    // attribute uses included by this attribute group
    private static final int INITIAL_SIZE = 5;
    XSAttributeUse[] fAttributeUses = new XSAttributeUse[INITIAL_SIZE];
    // attribute wildcard included by this attribute group
    public XSWildcardDecl fAttributeWC = null;

    void addAttributeUse(XSAttributeUse attrUse) {
        // while adding check for duplicate attribute use.
        // This will take care of union of attributeUse(s).
        
        for (int i=0; i<fAttrUseNum; i++) {
        	// if equals, then attr. already exists. No need to add again.
        	if (fAttributeUses[i].fAttrDecl.fName.equals(attrUse.fAttrDecl.fName) &&
        	    fAttributeUses[i].fAttrDecl.fTargetNamespace.equals(attrUse.fAttrDecl.fTargetNamespace))
        		break;
        }
        if (i == fAttrUseNum) {
        	// loop traversed completely. No duplicates found.
        	// resize array, if required.
        	if (fAttrUseNum == fAttributeUses.length) {
            		fAttributeUses = resize(fAttributeUses, fAttrUseNum*2);
        	}
        	fAttributeUses[fAttrUseNum++] = attrUse;
        }
    }

    public XSAttributeUse[] getAttributeUses() {
        if (fAttrUseNum < fAttributeUses.length) {
            fAttributeUses = resize(fAttributeUses, fAttrUseNum);
        }
        return fAttributeUses;
    }

    static final XSAttributeUse[] resize(XSAttributeUse[] oldArray, int newSize) {
        XSAttributeUse[] newArray = new XSAttributeUse[newSize];
        System.arraycopy(oldArray, 0, newArray, 0, Math.min(oldArray.length, newSize));
        return newArray;
    }

} // class XSAttributeGroupDecl