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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 abstract PSVI item for an element or an attribute 
 * information item.
 */
public interface ItemPSVI {
    /**
     * Validity value indicating that validation has either not been performed 
     * or that a strict assessment of validity could not be performed. 
     */
    public static final short VALIDITY_NOTKNOWN         = 0;
    /**
     * Validity value indicating that validation has been strictly assessed 
     * and the item in question is invalid according to the rules of schema 
     * validation. 
     */
    public static final short VALIDITY_INVALID          = 1;
    /**
     * Validation status indicating that schema validation has been performed 
     * and the item in question is valid according to the rules of schema 
     * validation. 
     */
    public static final short VALIDITY_VALID            = 2;
    /**
     * Validation status indicating that schema validation has been performed 
     * and the item in question has specifically been skipped. 
     */
    public static final short VALIDATION_NONE           = 0;
    /**
     * Validation status indicating that schema validation has been performed 
     * on the item in question under the rules of lax validation. 
     */
    public static final short VALIDATION_PARTIAL        = 1;
    /**
     * Validation status indicating that full schema validation has been 
     * performed on the item. 
     */
    public static final short VALIDATION_FULL           = 2;
    
    /**
     * Returns a reference to an immutable instance with the same data
     * that this instance of ItemPSVI currently has.
     */
    public ItemPSVI constant();
    
    /** 
     * Returns true if this specific instance of
     * ItemPSVI is immutable, otherwise false.
     */
    public boolean isConstant();
    
    /**
     * The nearest ancestor element information item with a 
     * [schema information] property (or this element item 
     * itself if it has such a property). For more information refer to 
     * element validation context and attribute validation context . 
     */
    public String getValidationContext();

    /**
     * [validity]: determines the validity of the schema item 
     * with respect to the validation being attempted. The value will be one 
     * of the constants: VALIDITY_NOTKNOWN, 
     * VALIDITY_INVALID or VALIDITY_VALID. 
     */
    public short getValidity();

    /**
     * [validation attempted]: determines the extent to which 
     * the schema item has been validated. The value will be one of the 
     * constants: VALIDATION_NONE, 
     * VALIDATION_PARTIAL or VALIDATION_FULL. 
     */
    public short getValidationAttempted();

    /**
     * [schema error code]: a list of error codes generated from 
     * the validation attempt or an empty StringList if no 
     * errors occurred during the validation attempt. 
     */
    public StringList getErrorCodes();
    
    /**
     * A list of error messages generated from the validation attempt or
     * an empty StringList if no errors occurred during the 
     * validation attempt. The indices of error messages in this list are 
     * aligned with those in the [schema error code] list.
     */
    public StringList getErrorMessages();

    /**
     * [schema normalized value]: the normalized value of this 
     * item after validation. 
     * 
     * @deprecated Use getSchemaValue().getNormalizedValue() instead
     */
    public String getSchemaNormalizedValue();

    /**
     * [schema normalized value]: Binding specific actual value 
     * or null if the value is in error. 
     * @exception XSException
     *   NOT_SUPPORTED_ERR: Raised if the implementation does not support this 
     *   method.
     * 
     * @deprecated Use getSchemaValue().getActualValue() instead
     */
    public Object getActualNormalizedValue()
                                   throws XSException;

    /**
     * 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. If the actualNormalizedValue
     *  is null, this method returns UNAVAILABLE_DT. 
     * @exception XSException
     *   NOT_SUPPORTED_ERR: Raised if the implementation does not support this 
     *   method.
     *   
     *  @deprecated Use getSchemaValue().getActualValueType() instead
     */
    public short getActualNormalizedValueType()
                                   throws XSException;

    /**
     * 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. * @exception XSException * NOT_SUPPORTED_ERR: Raised if the implementation does not support this * method. * * @deprecated Use getSchemaValue().getListValueTypes() instead */ public ShortList getItemValueTypes() throws XSException; /** * If this item has a simple type definition or a complex type with simple * content, then return the value with respect to the simple type. If * this item doesn't have a simple-typed value, the behavior of this method * is not specified. */ public XSValue getSchemaValue(); /** * [type definition]: an item isomorphic to the type * definition used to validate the schema item. */ public XSTypeDefinition getTypeDefinition(); /** * [member type definition]: if and only if that type * definition is a simple type definition with {variety} union, or a * complex type definition whose {content type} is a simple type * definition with {variety} union, then an item isomorphic to that * member of the union's {member type definitions} which actually * validated the schema item's normalized value. */ public XSSimpleTypeDefinition getMemberTypeDefinition(); /** * [schema default]: the canonical lexical representation of * the declaration's {value constraint} value. For more information * refer to element schema default and attribute schema default. */ public String getSchemaDefault(); /** * [schema specified]: if true, the value was specified in * the schema. If false, the value comes from the infoset. For more * information refer to element specified and attribute specified. */ public boolean getIsSchemaSpecified(); }




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