/*
 * 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.impl.xs;

import org.apache.xerces.impl.dv.ValidatedInfo;
import org.apache.xerces.impl.xs.util.StringListImpl;
import org.apache.xerces.xs.ElementPSVI;
import org.apache.xerces.xs.ItemPSVI;
import org.apache.xerces.xs.ShortList;
import org.apache.xerces.xs.StringList;
import org.apache.xerces.xs.XSElementDeclaration;
import org.apache.xerces.xs.XSModel;
import org.apache.xerces.xs.XSNotationDeclaration;
import org.apache.xerces.xs.XSSimpleTypeDefinition;
import org.apache.xerces.xs.XSTypeDefinition;
import org.apache.xerces.xs.XSValue;

Element PSV infoset augmentations implementation.
The following information will be available at the startElement call:
name, namespace, type, notation, validation context
The following information will be available at the endElement call:
nil, specified, normalized value, member type, validity, error codes,
default
Author:
Elena Litani IBM
@xerces.internal
Version:
$Id: ElementPSVImpl.java 1065753 2011-01-31 20:31:00Z mrglavas $/**
 * Element PSV infoset augmentations implementation.
 * The following information will be available at the startElement call:
 * name, namespace, type, notation, validation context
 *
 * The following information will be available at the endElement call:
 * nil, specified, normalized value, member type, validity, error codes,
 * default
 *
 * @xerces.internal 
 *
 * @author Elena Litani IBM
 * @version $Id: ElementPSVImpl.java 1065753 2011-01-31 20:31:00Z mrglavas $
 */
public class ElementPSVImpl implements ElementPSVI {

    
element declaration /** element declaration */
    protected XSElementDeclaration fDeclaration = null;

    
type of element, could be xsi:type /** type of element, could be xsi:type */
    protected XSTypeDefinition fTypeDecl = null;

    
true if clause 3.2 of Element Locally Valid (Element) (3.3.4) 
is satisfied, otherwise false 
/** true if clause 3.2 of Element Locally Valid (Element) (3.3.4) 
      * is satisfied, otherwise false 
      */
    protected boolean fNil = false;

    
true if the element value was provided by the schema; false otherwise. 
/** true if the element value was provided by the schema; false otherwise. 
     */
    protected boolean fSpecified = false;

    
Schema value /** Schema value */
    protected ValidatedInfo fValue = new ValidatedInfo();

    
http://www.w3.org/TR/xmlschema-1/#e-notation/** http://www.w3.org/TR/xmlschema-1/#e-notation*/
    protected XSNotationDeclaration fNotation = null;

    
validation attempted: none, partial, full /** validation attempted: none, partial, full */
    protected short fValidationAttempted = ElementPSVI.VALIDATION_NONE;

    
validity: valid, invalid, unknown /** validity: valid, invalid, unknown */
    protected short fValidity = ElementPSVI.VALIDITY_NOTKNOWN;

    
error codes and error messages /** error codes and error messages */
    protected String[] fErrors = null;

    
validation context: could be QName or XPath expression/** validation context: could be QName or XPath expression*/
    protected String fValidationContext = null;
    
    
deferred XSModel /** deferred XSModel **/
    protected SchemaGrammar[] fGrammars = null;

    
the schema information property /** the schema information property */
    protected XSModel fSchemaInformation = null;
    
    
true if this object is immutable /** true if this object is immutable **/
    protected boolean fIsConstant;
    
    public ElementPSVImpl() {}
    
    public ElementPSVImpl(boolean isConstant, ElementPSVI elementPSVI) {
        fDeclaration = elementPSVI.getElementDeclaration();
        fTypeDecl = elementPSVI.getTypeDefinition();
        fNil = elementPSVI.getNil();
        fSpecified = elementPSVI.getIsSchemaSpecified();
        fValue.copyFrom(elementPSVI.getSchemaValue());
        fNotation = elementPSVI.getNotation();
        fValidationAttempted = elementPSVI.getValidationAttempted();
        fValidity = elementPSVI.getValidity();
        fValidationContext = elementPSVI.getValidationContext();
        if (elementPSVI instanceof ElementPSVImpl) {
            final ElementPSVImpl elementPSVIImpl = (ElementPSVImpl) elementPSVI;
            fErrors = (elementPSVIImpl.fErrors != null) ?
                    (String[]) elementPSVIImpl.fErrors.clone() : null;
            elementPSVIImpl.copySchemaInformationTo(this);
        }
        else {
            final StringList errorCodes = elementPSVI.getErrorCodes();
            final int length = errorCodes.getLength();
            if (length > 0) {
                final StringList errorMessages = elementPSVI.getErrorMessages();
                final String[] errors = new String[length << 1];
                for (int i = 0, j = 0; i < length; ++i) {
                    errors[j++] = errorCodes.item(i);
                    errors[j++] = errorMessages.item(i);
                }
                fErrors = errors;
            }
            fSchemaInformation = elementPSVI.getSchemaInformation();
        }
        fIsConstant = isConstant;
    }
    
    //
    // ElementPSVI methods
    //
    
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.ItemPSVI#constant()
     */
    public ItemPSVI constant() {
        if (isConstant()) {
            return this;
        }
        return new ElementPSVImpl(true, this);
    }
    
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.ItemPSVI#isConstant()
     */
    public boolean isConstant() {
        return fIsConstant;
    }

    
[schema default]
See Also:
Returns:
The canonical lexical representation of the declaration's {value constraint} value./**
     * [schema default]
     *
     * @return The canonical lexical representation of the declaration's {value constraint} value.
     * @see <a href="http://www.w3.org/TR/xmlschema-1/#e-schema_default>XML Schema Part 1: Structures [schema default]</a>
     */
    public String getSchemaDefault() {
        return fDeclaration == null ? null : fDeclaration.getConstraintValue();
    }

    
[schema normalized value]
See Also:
Returns:
the normalized value of this item after validation/**
     * [schema normalized value]
     *
     *
     * @see <a href="http://www.w3.org/TR/xmlschema-1/#e-schema_normalized_value>XML Schema Part 1: Structures [schema normalized value]</a>
     * @return the normalized value of this item after validation
     */
    public String getSchemaNormalizedValue() {
        return fValue.getNormalizedValue();
    }

    
[schema specified] 
See Also:
XML Schema Part 1: Structures [schema specified]
Returns:
true - value was specified in schema, false - value comes from the infoset/**
     * [schema specified] 
     * @see <a href="http://www.w3.org/TR/xmlschema-1/#e-schema_specified">XML Schema Part 1: Structures [schema specified]</a>
     * @return true - value was specified in schema, false - value comes from the infoset
     */
    public boolean getIsSchemaSpecified() {
        return fSpecified;
    }

    
Determines the extent to which the document has been validated
Returns:
return the [validation attempted] property. The possible values are
        NO_VALIDATION, PARTIAL_VALIDATION and FULL_VALIDATION/**
     * Determines the extent to which the document has been validated
     *
     * @return return the [validation attempted] property. The possible values are
     *         NO_VALIDATION, PARTIAL_VALIDATION and FULL_VALIDATION
     */
    public short getValidationAttempted() {
        return fValidationAttempted;
    }

    
Determine the validity of the node with respect
to the validation being attempted
Returns:
return the [validity] property. Possible values are:
        UNKNOWN_VALIDITY, INVALID_VALIDITY, VALID_VALIDITY/**
     * Determine the validity of the node with respect
     * to the validation being attempted
     *
     * @return return the [validity] property. Possible values are:
     *         UNKNOWN_VALIDITY, INVALID_VALIDITY, VALID_VALIDITY
     */
    public short getValidity() {
        return fValidity;
    }

    
A list of error codes generated from validation attempts.
Need to find all the possible subclause reports that need reporting
Returns:
Array of error codes/**
     * A list of error codes generated from validation attempts.
     * Need to find all the possible subclause reports that need reporting
     *
     * @return Array of error codes
     */
    public StringList getErrorCodes() {
        if (fErrors == null || fErrors.length == 0) {
            return StringListImpl.EMPTY_LIST;
        }
        return new PSVIErrorList(fErrors, true);
    }
    
    
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.
/**
     * A list of error messages generated from the validation attempt or
     * an empty <code>StringList</code> if no errors occurred during the 
     * validation attempt. The indices of error messages in this list are 
     * aligned with those in the <code>[schema error code]</code> list.
     */
    public StringList getErrorMessages() {
        if (fErrors == null || fErrors.length == 0) {
            return StringListImpl.EMPTY_LIST;
        }
        return new PSVIErrorList(fErrors, false);
    }

    // This is the only information we can provide in a pipeline.
    public String getValidationContext() {
        return fValidationContext;
    }

    
[nil]
See Also:
Returns:
true if clause 3.2 of Element Locally Valid (Element) (3.3.4) above is satisfied, otherwise false/**
     * [nil]
     * @see <a href="http://www.w3.org/TR/xmlschema-1/#e-nil>XML Schema Part 1: Structures [nil]</a>
     * @return true if clause 3.2 of Element Locally Valid (Element) (3.3.4) above is satisfied, otherwise false
     */
    public boolean getNil() {
        return fNil;
    }

    
[notation] 
See Also:
Returns:
The notation declaration./**
     * [notation] 
     * @see <a href="http://www.w3.org/TR/xmlschema-1/#e-notation>XML Schema Part 1: Structures [notation]</a>
     * @return The notation declaration. 
     */
    public XSNotationDeclaration getNotation() {
        return fNotation;
    }

    
An item isomorphic to the type definition used to validate this element.
Returns:
 a type declaration/**
     * An item isomorphic to the type definition used to validate this element.
     * 
     * @return  a type declaration
     */
    public XSTypeDefinition getTypeDefinition() {
        return fTypeDecl;
    }
    
    
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 thype definition with {variety} union, then an item isomorphic
to that member of the union's {member type definitions} which actually
validated the element item's normalized value.
Returns:
 a simple type declaration/**
     * 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 thype definition with {variety} union, then an item isomorphic
     * to that member of the union's {member type definitions} which actually
     * validated the element item's normalized value.
     * 
     * @return  a simple type declaration
     */
    public XSSimpleTypeDefinition getMemberTypeDefinition() {
        return fValue.getMemberTypeDefinition();
    }

    
An item isomorphic to the element declaration used to validate
this element.
Returns:
 an element declaration/**
     * An item isomorphic to the element declaration used to validate
     * this element.
     * 
     * @return  an element declaration
     */
    public XSElementDeclaration getElementDeclaration() {
        return fDeclaration;
    }

    
[schema information]
See Also:
XML Schema Part 1: Structures [schema information]
Returns:
The schema information property if it's the validation root,
        null otherwise./**
     * [schema information]
     * @see <a href="http://www.w3.org/TR/xmlschema-1/#e-schema_information">XML Schema Part 1: Structures [schema information]</a>
     * @return The schema information property if it's the validation root,
     *         null otherwise.
     */
    public synchronized XSModel getSchemaInformation() {
        if (fSchemaInformation == null && fGrammars != null) {
            fSchemaInformation = new XSModelImpl(fGrammars);
        }
        return fSchemaInformation;
    }
    
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.ItemPSVI#getActualNormalizedValue()
     */
    public Object getActualNormalizedValue() {
        return fValue.getActualValue();
    }

    /* (non-Javadoc)
     * @see org.apache.xerces.xs.ItemPSVI#getActualNormalizedValueType()
     */
    public short getActualNormalizedValueType() {
        return fValue.getActualValueType();
    }

    /* (non-Javadoc)
     * @see org.apache.xerces.xs.ItemPSVI#getItemValueTypes()
     */
    public ShortList getItemValueTypes() {
        return fValue.getListValueTypes();
    }

    /* (non-Javadoc)
     * @see org.apache.xerces.xs.ItemPSVI#getSchemaValue()
     */
    public XSValue getSchemaValue() {
        return fValue;
    }
    
    
Reset() should be called in validator startElement(..) method.
/**
     * Reset() should be called in validator startElement(..) method.
     */
    public void reset() {
        fDeclaration = null;
        fTypeDecl = null;
        fNil = false;
        fSpecified = false;
        fNotation = null;
        fValidationAttempted = ElementPSVI.VALIDATION_NONE;
        fValidity = ElementPSVI.VALIDITY_NOTKNOWN;
        fErrors = null;
        fValidationContext = null;
        fValue.reset();
    }
    
    public void copySchemaInformationTo(ElementPSVImpl target) {
        target.fGrammars = fGrammars;
        target.fSchemaInformation = fSchemaInformation;
    }
}