domelementimpl.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 650 行 · 第 1/2 页

/*
 * Copyright 2001-2004 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.
 */

/*
 * $Id: DOMElementImpl.cpp,v 1.28 2004/09/20 15:00:50 amassari Exp $
 */

#include "DOMElementImpl.hpp"

#include <xercesc/dom/DOMAttr.hpp>
#include <xercesc/dom/DOMDocument.hpp>
#include <xercesc/dom/DOMException.hpp>
#include <xercesc/util/XMLUniDefs.hpp>
#include <xercesc/util/XMLUri.hpp>

#include "DOMAttrMapImpl.hpp"
#include "DOMAttrImpl.hpp"
#include "DOMDocumentImpl.hpp"
#include "DOMParentNode.hpp"
#include "DOMCasts.hpp"
#include "DOMElementNSImpl.hpp"
#include "DOMTypeInfoImpl.hpp"

#include "DOMDocumentTypeImpl.hpp"
#include <xercesc/util/OutOfMemoryException.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class DOMAttr;

DOMElementImpl::DOMElementImpl(DOMDocument *ownerDoc, const XMLCh *eName)
    : fNode(ownerDoc), fParent(ownerDoc), fAttributes(0), fDefaultAttributes(0)
{
    DOMDocumentImpl *docImpl = (DOMDocumentImpl *)ownerDoc;
    fName = docImpl->getPooledString(eName);
    setupDefaultAttributes();
    if (!fDefaultAttributes) {
        fDefaultAttributes = new (getOwnerDocument()) DOMAttrMapImpl(this);
        fAttributes = new (getOwnerDocument()) DOMAttrMapImpl(this);
    }
    else {
        fAttributes = new (getOwnerDocument()) DOMAttrMapImpl(this, fDefaultAttributes);
    }
}


DOMElementImpl::DOMElementImpl(const DOMElementImpl &other, bool deep)
    : fNode(other.getOwnerDocument()),
      fParent(other.getOwnerDocument()),
      fAttributes(0),
      fDefaultAttributes(0)
{
    fName = other.fName;

    if (deep)
        fParent.cloneChildren(&other);

    if (other.getAttributes())
    {
        fAttributes = ((DOMAttrMapImpl *)other.getAttributes())->cloneAttrMap(this);
    }

    if (other.getDefaultAttributes())
    {
        fDefaultAttributes = ((DOMAttrMapImpl *)other.getDefaultAttributes())->cloneAttrMap(this);
    }

    if (!fDefaultAttributes)
        setupDefaultAttributes();

    if (!fDefaultAttributes)
        fDefaultAttributes = new (getOwnerDocument()) DOMAttrMapImpl(this);

    if (!fAttributes) {
        if (!fDefaultAttributes) {
            fAttributes = new (getOwnerDocument()) DOMAttrMapImpl(this);
        }
        else {
            fAttributes = new (getOwnerDocument()) DOMAttrMapImpl(this, fDefaultAttributes);
        }
    }

}


DOMElementImpl::~DOMElementImpl()
{
}


DOMNode *DOMElementImpl::cloneNode(bool deep) const
{
    DOMNode* newNode = new (getOwnerDocument(), DOMDocumentImpl::ELEMENT_OBJECT) DOMElementImpl(*this, deep);
    fNode.callUserDataHandlers(DOMUserDataHandler::NODE_CLONED, this, newNode);
    return newNode;
}




const XMLCh * DOMElementImpl::getNodeName() const {
    return fName;
}


short DOMElementImpl::getNodeType() const {
    return DOMNode::ELEMENT_NODE;
}


const XMLCh * DOMElementImpl::getAttribute(const XMLCh *nam) const
{
    DOMNode * attr = fAttributes->getNamedItem(nam);
    if (attr)
        return attr->getNodeValue();

    return XMLUni::fgZeroLenString;
}



DOMAttr *DOMElementImpl::getAttributeNode(const XMLCh *nam) const
{
    return  (DOMAttr *)fAttributes->getNamedItem(nam);
}


DOMNamedNodeMap *DOMElementImpl::getAttributes() const
{
    DOMElementImpl *ncThis = (DOMElementImpl *)this;   // cast off const
    return ncThis->fAttributes;
}



DOMNodeList *DOMElementImpl::getElementsByTagName(const XMLCh *tagname) const
{
    DOMDocumentImpl *docImpl = (DOMDocumentImpl *)getOwnerDocument();
    return docImpl->getDeepNodeList(this,tagname);
}


const XMLCh * DOMElementImpl::getTagName() const
{
    return fName;
}


void DOMElementImpl::removeAttribute(const XMLCh *nam)
{
    if (fNode.isReadOnly())
        throw DOMException(
             DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    XMLSSize_t i = fAttributes->findNamePoint(nam);
    if (i >= 0)
    {
        DOMNode *att = fAttributes->removeNamedItemAt(i);
        ((DOMAttrImpl *)att)->removeAttrFromIDNodeMap();
        att->release();
    }
}



DOMAttr *DOMElementImpl::removeAttributeNode(DOMAttr *oldAttr)
{
    if (fNode.isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    DOMNode* found = 0;

    // Since there is no removeAttributeNodeNS, check if this oldAttr has NS or not
    const XMLCh* localName = oldAttr->getLocalName();
    XMLSSize_t i = 0;
    if (localName)
        i = fAttributes->findNamePoint(oldAttr->getNamespaceURI(), localName);
    else
        i = fAttributes->findNamePoint(oldAttr->getName());

    if (i >= 0) {
        // If it is in fact the right object, remove it.
        found = fAttributes->item(i);
        if (found == oldAttr) {
            fAttributes->removeNamedItemAt(i);
            ((DOMAttrImpl *)oldAttr)->removeAttrFromIDNodeMap();
        }
        else
            throw DOMException(DOMException::NOT_FOUND_ERR, 0, GetDOMNodeMemoryManager);

    }
    else
        throw DOMException(DOMException::NOT_FOUND_ERR, 0, GetDOMNodeMemoryManager);

   return (DOMAttr *)found;
}



void DOMElementImpl::setAttribute(const XMLCh *nam, const XMLCh *val)
{
    if (fNode.isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    DOMAttr* newAttr = getAttributeNode(nam);
    if (!newAttr)
    {
        newAttr = this->fNode.getOwnerDocument()->createAttribute(nam);
        fAttributes->setNamedItem(newAttr);
    }

    newAttr->setNodeValue(val);
}

void DOMElementImpl::setIdAttribute(const XMLCh* name)
{
    if (fNode.isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    DOMAttr *attr = getAttributeNode(name);

    if (!attr) 
        throw DOMException(DOMException::NOT_FOUND_ERR, 0, GetDOMNodeMemoryManager);

    ((DOMAttrImpl *)attr)->addAttrToIDNodeMap();
}

void DOMElementImpl::setIdAttributeNS(const XMLCh* namespaceURI, const XMLCh* localName) {

    if (fNode.isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    DOMAttr *attr = getAttributeNodeNS(namespaceURI, localName);

    if (!attr) 
        throw DOMException(DOMException::NOT_FOUND_ERR, 0, GetDOMNodeMemoryManager);

    ((DOMAttrImpl *)attr)->addAttrToIDNodeMap();

}


void DOMElementImpl::setIdAttributeNode(const DOMAttr *idAttr) {

    if (fNode.isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    DOMAttr *attr;
    const XMLCh* localName = idAttr->getLocalName();
    if (localName)
        attr = getAttributeNodeNS(idAttr->getNamespaceURI(), idAttr->getLocalName());
    else 
        attr = getAttributeNode(idAttr->getName());
    
    if(!attr) 
        throw DOMException(DOMException::NOT_FOUND_ERR, 0, GetDOMNodeMemoryManager);

    ((DOMAttrImpl *)attr)->addAttrToIDNodeMap();
}


DOMAttr * DOMElementImpl::setAttributeNode(DOMAttr *newAttr)
{
    if (fNode.isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    if (newAttr->getNodeType() != DOMNode::ATTRIBUTE_NODE)
        throw DOMException(DOMException::WRONG_DOCUMENT_ERR, 0, GetDOMNodeMemoryManager);
        // revisit.  Exception doesn't match test.

    // This will throw INUSE if necessary
    DOMAttr *oldAttr = (DOMAttr *) fAttributes->setNamedItem(newAttr);

    return oldAttr;
}


void DOMElementImpl::setNodeValue(const XMLCh *x)
{
    fNode.setNodeValue(x);
}



void DOMElementImpl::setReadOnly(bool readOnl, bool deep)
{
    fNode.setReadOnly(readOnl,deep);
    fAttributes->setReadOnly(readOnl,true);
}


//Introduced in DOM Level 2
const XMLCh * DOMElementImpl::getAttributeNS(const XMLCh *fNamespaceURI,
    const XMLCh *fLocalName) const
{
    DOMAttr * attr=
      (DOMAttr *)(fAttributes->getNamedItemNS(fNamespaceURI, fLocalName));
    return (attr==0) ? XMLUni::fgZeroLenString : attr->getValue();
}


void DOMElementImpl::setAttributeNS(const XMLCh *fNamespaceURI,
    const XMLCh *qualifiedName, const XMLCh *fValue)
{
    if (fNode.isReadOnly())
        throw DOMException(