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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (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.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.xerces.xs;

/**
 * Represents an actual value of a simple type.
 */
public interface XSValue {
    
    /**
     * The schema normalized value.
     */
    public String getNormalizedValue();

    /**
     * The actual value. null if the value is in error. 
     */
    public Object getActualValue();

    /**
     * The declared simple type definition used to validate this value.
     * It can be a union type.
     */
    public XSSimpleTypeDefinition getTypeDefinition();

    /**
     * If the declared simple type definition is a union, return the member
     * type actually used to validate the value. Otherwise null.
     */
    public XSSimpleTypeDefinition getMemberTypeDefinition();

    /**
     * If getTypeDefinition() returns a list type whose item type
     * is a union type, then this method returns a list with the same length
     * as the value list, for simple types that actually validated
     * the corresponding item in the value. 
     */
    public XSObjectList getMemberTypeDefinitions();

    /**
     * The actual value built-in datatype, e.g. 
     * STRING_DT, SHORT_DT. If the type definition of this 
     * value is a list type definition, this method returns 
     * LIST_DT. If the type definition of this value is a list 
     * type definition whose item type is a union type definition, this 
     * method returns LISTOFUNION_DT. To query the actual value 
     * of the list or list of union type definitions use 
     * itemValueTypes().
     */
    public short getActualValueType();

    /**
     * In the case the actual value represents a list, i.e. the 
     * actualNormalizedValueType is LIST_DT, the 
     * returned array consists of one type kind which represents the itemType
     * . For example: 
     *  <simpleType name="listtype"> <list 
     * itemType="positiveInteger"/> </simpleType> <element 
     * name="list" type="listtype"/> ... <list>1 2 3</list> 
     *  
     * The schemaNormalizedValue value is "1 2 3", the 
     * actualNormalizedValueType value is LIST_DT, 
     * and the itemValueTypes is an array of size 1 with the 
     * value POSITIVEINTEGER_DT. 
     * 
 If the actual value represents a list type definition whose item 
     * type is a union type definition, i.e. LISTOFUNION_DT, 
     * for each actual value in the list the array contains the 
     * corresponding memberType kind. For example: 
     *  <simpleType 
     * name='union_type' memberTypes="integer string"/> <simpleType 
     * name='listOfUnion'> <list itemType='union_type'/> 
     * </simpleType> <element name="list" type="listOfUnion"/> 
     * ... <list>1 2 foo</list> 
     *  The 
     * schemaNormalizedValue value is "1 2 foo", the 
     * actualNormalizedValueType is LISTOFUNION_DT
     * , and the itemValueTypes is an array of size 3 with the 
     * following values: INTEGER_DT, INTEGER_DT, STRING_DT. 
     */
    public ShortList getListValueTypes();

}