root/utils/abcasm/src/abcasm/Trait.java

DEFINITIONS

1. addAttr
2. validate
3. getKind
4. setAttr
5. hasAttr
6. getAttr
7. getIntAttr
8. getNameAttr
9. verifyContains

/* -*- Mode: Java; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is [Open Source Virtual Machine.].
 *
 * The Initial Developer of the Original Code is
 * Adobe System Incorporated.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Adobe AS3 Team
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
package abcasm;

import java.util.HashMap;

class Trait 
{
        int kind_byte;
        
        HashMap<String,Object> attrs = new HashMap<String,Object>();
        
        Trait(int kind)
        {
                this.kind_byte = kind;
        }

        void addAttr(String key, Object value)
        {
                if ( attrs.containsKey(key) )
                {
                        throw new IllegalArgumentException("Trait attribute " + key + " cannot be specified twice." );
                }

                attrs.put(key, value);
        }

        void validate()
        {
                verifyContains("name", null);
        }

        public int getKind()
        {
                return kind_byte & 0x0F;
        }
        
        public void setAttr(String attr_name, Object attr_value)
        {
                attrs.put(attr_name, attr_value);
        }

        public boolean hasAttr(String attr_name)
        {
                return attrs.containsKey(attr_name);
        }

        public Object getAttr(String attr_name)
        {
                verifyContains(attr_name, null);
                return attrs.get(attr_name);
        }

        public int getIntAttr(String attr_name)
        {
                verifyContains(attr_name, Integer.class);
                return (Integer)attrs.get(attr_name);
        }
        
        public Name getNameAttr(String attr_name)
        {
                verifyContains(attr_name, Name.class);
                return (Name)attrs.get(attr_name);
        }
        
        void verifyContains(String attr_name, Class clazz)
        {
                if ( !attrs.containsKey(attr_name) )
                        throw new IllegalArgumentException("Required attribute " + attr_name + " not found.");
                if ( ! ( null == clazz ||  attrs.get(attr_name).getClass().equals(clazz) ) )
                {
                        throw new IllegalArgumentException("Attribute " + attr_name + " must be type " + clazz.getSimpleName() );
                }
        }
}