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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.
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/*   Copyright 2004 The Apache Software Foundation
 *
 *   Licensed 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.xmlbeans.impl.schema;

import javax.xml.namespace.QName;
import org.apache.xmlbeans.SchemaAnnotation;
import org.apache.xmlbeans.SchemaBookmark;
import org.apache.xmlbeans.SchemaType;
import org.apache.xmlbeans.SchemaLocalAttribute;
import org.apache.xmlbeans.XmlCursor;
import org.apache.xmlbeans.XmlObject;
import org.apache.xmlbeans.XmlAnySimpleType;
import org.apache.xmlbeans.XmlQName;
import org.apache.xmlbeans.soap.SOAPArrayType;
import org.apache.xmlbeans.soap.SchemaWSDLArrayType;
import org.apache.xmlbeans.impl.values.NamespaceContext;

import java.math.BigInteger;

public class SchemaLocalAttributeImpl implements SchemaLocalAttribute, SchemaWSDLArrayType
{
    public SchemaLocalAttributeImpl()
    {
    }

    public void init(QName name, SchemaType.Ref typeref, int use, String deftext, XmlObject parseObject, XmlValueRef defvalue, boolean isFixed, SOAPArrayType wsdlArray, SchemaAnnotation ann, Object userData)
    {
        if (_xmlName != null || _typeref != null)
            throw new IllegalStateException("Already initialized");
        _use = use;
        _typeref = typeref;
        _defaultText = deftext;
        _parseObject = parseObject;
        _defaultValue = defvalue;
        _isDefault = (deftext != null);
        _isFixed = isFixed;
        _xmlName = name;
        _wsdlArrayType = wsdlArray;
        _annotation = ann;
        _userData = userData;
    }

    private String _defaultText;
    /* package */ XmlValueRef _defaultValue;
    private boolean _isFixed;
    private boolean _isDefault;
    private QName _xmlName;
    private SchemaType.Ref _typeref;
    private SOAPArrayType _wsdlArrayType;
    private int _use;
    private SchemaAnnotation _annotation;
    protected XmlObject _parseObject; // for QName resolution
    private Object _userData;

    public boolean isTypeResolved()
    {
        return (_typeref != null);
    }

    public void resolveTypeRef(SchemaType.Ref typeref)
    {
        if (_typeref != null)
            throw new IllegalStateException();
        _typeref = typeref;
    }

    public int getUse()
        { return _use; }

    public QName getName()
        { return _xmlName; }

    public String getDefaultText()
        { return _defaultText; }

    public boolean isDefault()
        { return _isDefault; }

    public boolean isFixed()
        { return _isFixed; }

    public boolean isAttribute()
        { return true; }

    public SchemaAnnotation getAnnotation()
        { return _annotation; }

    public SchemaType getType()
        { return _typeref.get(); }

    public SchemaType.Ref getTypeRef()
        { return _typeref; }

    public BigInteger getMinOccurs()
        { return _use == REQUIRED ? BigInteger.ONE : BigInteger.ZERO; }

    public BigInteger getMaxOccurs()
        { return _use == PROHIBITED ? BigInteger.ZERO : BigInteger.ONE; }

    public boolean isNillable()
        { return false; }

    public SOAPArrayType getWSDLArrayType()
        { return _wsdlArrayType; }
    
    public XmlAnySimpleType getDefaultValue()
    {
        if (_defaultValue != null)
            return _defaultValue.get();
        if (_defaultText != null && XmlAnySimpleType.type.isAssignableFrom(getType()))
        {
            if (_parseObject != null)
            {
                try
                {
                    NamespaceContext.push(new NamespaceContext(_parseObject));
                    return getType().newValue(_defaultText);
                }
                finally
                {
                    NamespaceContext.pop();
                }
            }
            return getType().newValue(_defaultText);
        }
        return null;
    }

    public void setDefaultValue(XmlValueRef defaultRef)
        { _defaultValue = defaultRef; }

    public Object getUserData()
    {   return _userData; }
}