src/xalanc/DOMSupport/XalanDocumentPrefixResolver.hpp

/*
 * 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.
 */
#if !defined(XALANDOCUMENTPREFIXRESOLVER_HEADER_GUARD_1357924680)
#define XALANDOCUMENTPREFIXRESOLVER_HEADER_GUARD_1357924680



// Base include file.  Must be first.
#include <xalanc/DOMSupport/DOMSupportDefinitions.hpp>



#include <xalanc/XalanDOM/XalanDOMString.hpp>



#include <xalanc/PlatformSupport/PrefixResolver.hpp>
#include <xalanc/PlatformSupport/DOMStringHelper.hpp>



#include <xalanc/Include/XalanVector.hpp>
#include <xalanc/Include/XalanMap.hpp>
#include <xalanc/Include/STLHelper.hpp>



#include <xalanc/DOMSupport/TreeWalker.hpp>



namespace XALAN_CPP_NAMESPACE {





class XalanAttr;
class XalanDocument;

typedef XalanVector<const XalanNode*>               AttributeVectorTypeDecl;
XALAN_USES_MEMORY_MANAGER(AttributeVectorTypeDecl)


class XALAN_DOMSUPPORT_EXPORT XalanDocumentPrefixResolver : public PrefixResolver
{
public:

    typedef AttributeVectorTypeDecl                     AttributeVectorType;
    typedef XalanMap<const XalanDOMString*,
                    AttributeVectorType>                NamespacesMapType;

    /**
     * Constructor.
     *
     * @param theDocument The XalanDocument instance to use for namespace bindings.
     * @param theURI The base URI for the instance.  This is rarely needed, but can be provided if the URI for the XalanDocument instance is known.
     */
    XalanDocumentPrefixResolver(
            const XalanDocument*    theDocument,
            const XalanDOMString&   theURI = XalanDOMString(XalanMemMgrs::getDummyMemMgr()),
            MemoryManager&      theManager XALAN_DEFAULT_MEMMGR);

    virtual
    ~XalanDocumentPrefixResolver();


    virtual const XalanDOMString*
    getNamespaceForPrefix(const XalanDOMString&     prefix) const;

    virtual const XalanDOMString&
    getURI() const;

    /**
     * A utility class to walk the XalanDocument instance and look for attribute nodes that declare namespaces.
     */
    class NamespaceNodesTreeWalker : public TreeWalker
    {
    public:

        NamespaceNodesTreeWalker(NamespacesMapType&     theMap);

        virtual
        ~NamespaceNodesTreeWalker();

    protected:

        virtual bool
        startNode(const XalanNode*  node);

        virtual bool
        startNode(XalanNode*    node);

        virtual bool
        endNode(const XalanNode*    node);

        virtual bool
        endNode(XalanNode*  node);

    private:

        NamespacesMapType&  m_map;
    };


protected:

    /**
     * This function is called when more than one binding exists for a given prefix.
     * The default behavior uses the first binding, but a deriving class can change
     * that behavior by overriding.
     *
     * @param theVector The vector associated with the namespace prefix. 
     * @return A pointer to a const XalanDOMString containing the desired binding, or NULL.
     */
    virtual const XalanDOMString*
    duplicateBinding(const AttributeVectorType&     theVector) const;

private:

    NamespacesMapType       m_namespaces;

    const XalanDOMString    m_uri;
};



}



#endif  // XALANDOCUMENTPREFIXRESOLVER_HEADER_GUARD_1357924680