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    1   /*   Copyright 2004 The Apache Software Foundation
    2    *
    3    *   Licensed under the Apache License, Version 2.0 (the "License");
    4    *   you may not use this file except in compliance with the License.
    5    *   You may obtain a copy of the License at
    6    *
    7    *       http://www.apache.org/licenses/LICENSE-2.0
    8    *
    9    *   Unless required by applicable law or agreed to in writing, software
   10    *   distributed under the License is distributed on an "AS IS" BASIS,
   11    *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   12    *   See the License for the specific language governing permissions and
   13    *  limitations under the License.
   14    */
   15   
   16   package org.apache.xmlbeans;
   17   
   18   import javax.xml.namespace.QName;
   19   
   20   /**
   21    * Represents an attribute group.
   22    * <p>
   23    * An attribute group is a syntactic construct, not a part
   24    * of the logical model. For example, types declared within an
   25    * attribute group become local to the type that uses the group -
   26    * they're not local to the attribute group itself. Therefore
   27    * in the logical model of a schema type system, an attribute
   28    * group doesn't represent anything. Its contents are merged
   29    * into the logical model at parse time.
   30    * 
   31    * @see SchemaTypeLoader#findAttributeGroup
   32    */
   33   public interface SchemaAttributeGroup extends SchemaComponent, SchemaAnnotated
   34   {
   35       /**
   36        * Returns SchemaComponent.ATTRIBUTE_GROUP.
   37        */
   38       int getComponentType();
   39   
   40       /**
   41        * The name of the model group.
   42        */
   43       QName getName();
   44   
   45       /**
   46        * Used to allow on-demand loading of attribute groups.
   47        * 
   48        * @exclude
   49        */
   50       public final static class Ref extends SchemaComponent.Ref
   51       {
   52           public Ref(SchemaAttributeGroup attributeGroup)
   53               { super(attributeGroup); }
   54   
   55           public Ref(SchemaTypeSystem system, String handle)
   56               { super(system, handle); }
   57   
   58           public final int getComponentType()
   59               { return SchemaComponent.ATTRIBUTE_GROUP; }
   60   
   61           public final SchemaAttributeGroup get()
   62               { return (SchemaAttributeGroup)getComponent(); }
   63       }
   64   
   65       /**
   66        * Returns user-specific information.
   67        * @see SchemaBookmark
   68        */
   69       Object getUserData();
   70   }

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