xml.cpp

为电力系统开发保护设备装置通讯的源代码 采用串口通讯, ret hat 9下 QT开发

#include "xml.h"
#include <qfile.h> 
#include <qtextcodec.h> 
#include <qtextstream.h> 

CXMLReader::CXMLReader()
{
	m_FileName = "";
}

CXMLReader::CXMLReader(QString filename)
{
	m_FileName = filename;
}

CXMLReader::~CXMLReader()
{
}
//打开XML文件
bool CXMLReader::OpenDomXMLFile()
{
	QFile opmlFile(m_FileName);
	if (!opmlFile.open(IO_ReadOnly)) return false;

	QString szError = NULL;
	int iErrorLine = 0, iErrorColumn = 0;
	if (!m_DomTree.setContent(&opmlFile, &szError, &iErrorLine, &iErrorColumn))
	{
		opmlFile.close();
		printf("--@@Open XML File:%s Error row:%d col:%d Data:%s @@--\n", m_FileName.data(), iErrorLine, iErrorColumn, szError.data());
		return false;
	}
	opmlFile.close();
	return true;
}
//保存XML文件
bool CXMLReader::SaveXmlFile()
{
	m_Mutex.lock();
	QFile opmlFile(m_FileName);
	if (!opmlFile.open(IO_ReadWrite))
	{
		m_Mutex.unlock();
		return false;
	}
	QTextStream ts(&opmlFile);
	ts << m_DomTree.toString(4);
	opmlFile.close();
	m_Mutex.unlock();
	return true;
}

//取得父节点szDomName下的一个子节点szNodeName,匹配在第一个找到的节点
QDomNode CXMLReader::GetDomNode(QString szDomName, QString szNodeName)
{
	QDomElement root = m_DomTree.documentElement();
	QDomNode node, childnode, ret;
	node = root.firstChild();
	while (!node.isNull())
	{
		if (node.isElement() && node.nodeName().lower() == szDomName.lower())
		{
			QDomElement childelement = node.toElement();
			childnode = childelement.firstChild();
			while (!childnode.isNull())
			{
				if (childnode.isElement() && childnode.nodeName().lower() == szNodeName.lower())
				{
					return childnode;
				}
				childnode = childnode.nextSibling();
			}
		}
		node = node.nextSibling();
	}
	
	return ret;
}
//取得父节点szDomName下的一个子节点,匹配在第一个找到的节点的属性szAttrName的值相等szAttrValue
QDomNode CXMLReader::GetDomNode(QString szDomName, QString szAttrName, QString szAttrValue)
{
	QDomElement root = m_DomTree.documentElement();
	QDomNode node, childnode, ret;
	node = root.firstChild();
	while (!node.isNull())
	{
		if (node.isElement() && node.nodeName().lower() == szDomName.lower())
		{
			QDomElement childelement = node.toElement();
			childnode = childelement.firstChild();
			while (!childnode.isNull())
			{
				QDomNamedNodeMap dm = childnode.toElement().attributes();
				for (int i=0; i<(int)dm.count(); i++)
				{
					if (dm.item(i).nodeName().lower() == szAttrName.lower())
					{
						if (dm.item(i).nodeValue() == szAttrValue)
						{
							return childnode;
						}
					}
				}
				childnode = childnode.nextSibling();
			}
		}
		node = node.nextSibling();
	}
	
	return ret;
}
//同上,只是一次查找时利用两个属性来共同查找
QDomNode CXMLReader::GetDomNode(QString szDomName, QString szAttr1Name, QString szAttr1Value, QString szAttr2Name, QString szAttr2Value)
{
	QDomElement root = m_DomTree.documentElement();
	QDomNode node, childnode, ret;
	node = root.firstChild();
	while (!node.isNull())
	{
		if (node.isElement() && node.nodeName().lower() == szDomName.lower())
		{
			QDomElement childelement = node.toElement();
			childnode = childelement.firstChild();
			while (!childnode.isNull())
			{
				QDomNamedNodeMap dm = childnode.toElement().attributes();
				int iIndex1 = -1, iIndex2 = -1;
				for (int i=0; i<(int)dm.count(); i++)
				{
					if (dm.item(i).nodeName().lower() == szAttr1Name.lower()) iIndex1 = i;
					else if (dm.item(i).nodeName().lower() == szAttr2Name.lower()) iIndex2 = i;
				}
				if (iIndex1 >= 0 && iIndex2 >= 0)
				{
					if (dm.item(iIndex1).nodeValue() == szAttr1Value &&
						dm.item(iIndex2).nodeValue() == szAttr2Value)
					{
						return childnode;
					}
				}
				childnode = childnode.nextSibling();
			}
		}
		node = node.nextSibling();
	}
	
	return ret;
}
//取得父节点szDomName下的一个子节点szNodeName,匹配在第一个找到的节点的属性szAttrName的值相等szAttrValue
QDomNode CXMLReader::GetDomNode(QString szDomName, QString szNodeName, QString szAttrName, QString szAttrValue)
{
	QDomElement root = m_DomTree.documentElement();
	QDomNode node, childnode, ret;
	node = root.firstChild();
	while (!node.isNull())
	{
		if (node.isElement() && node.nodeName().lower() == szDomName.lower())
		{
			QDomElement childelement = node.toElement();
			childnode = childelement.firstChild();
			while (!childnode.isNull())
			{
				if (childnode.isElement() && childnode.nodeName().lower() == szNodeName.lower())
				{
					QDomNamedNodeMap dm = childnode.toElement().attributes();
					for (int i=0; i<(int)dm.count(); i++)
					{
						if (dm.item(i).nodeName().lower() == szAttrName.lower())
						{
							if (dm.item(i).nodeValue() == szAttrValue)
							{
								return childnode;
							}
						}
					}
				}
				childnode = childnode.nextSibling();
			}
		}
		node = node.nextSibling();
	}
	
	return ret;
}
//同上,只是一次查找时利用两个属性来共同查找
QDomNode CXMLReader::GetDomNode(QString szDomName, QString szNodeName, QString szAttr1Name, QString szAttr1Value, QString szAttr2Name, QString szAttr2Value)
{
	QDomElement root = m_DomTree.documentElement();
	QDomNode node, childnode, ret;
	node = root.firstChild();
	while (!node.isNull())
	{
		if (node.isElement() && node.nodeName().lower() == szDomName.lower())
		{
			QDomElement childelement = node.toElement();
			childnode = childelement.firstChild();
			while (!childnode.isNull())
			{
				if (childnode.isElement() && childnode.nodeName().lower() == szNodeName.lower())
				{
					QDomNamedNodeMap dm = childnode.toElement().attributes();
					int iIndex1 = -1, iIndex2 = -1;
					for (int i=0; i<(int)dm.count(); i++)
					{
						if (dm.item(i).nodeName().lower() == szAttr1Name.lower()) iIndex1 = i;
						else if (dm.item(i).nodeName().lower() == szAttr2Name.lower()) iIndex2 = i;
					}
					if (iIndex1 == -1 || iIndex2 == -1) return ret;
					if (dm.item(iIndex1).nodeValue() == szAttr1Value &&
						dm.item(iIndex2).nodeValue() == szAttr2Value)
					{
						return childnode;
					}
				}
				childnode = childnode.nextSibling();
			}
		}
		node = node.nextSibling();
	}
	
	return ret;
}
//根据子节点名称szNodeName,子节点的属性名szAttrName,属性值szAttrValue,在节点DomNode中查找子节点
QDomNode CXMLReader::GetChildNode(QDomNode& DomNode, QString szNodeName, QString szAttrName, QString szAttrValue)
{
	QDomNode childnode, ret;
	if (DomNode.isNull()) return ret;
	QDomElement childelement = DomNode.toElement();
	childnode = childelement.firstChild();
	while (!childnode.isNull())
	{
		if (childnode.isElement() && childnode.nodeName().lower() == szNodeName.lower())
		{
			if (szAttrName == "")
			{
				return childnode;
			}
			QDomNamedNodeMap dm;
			dm = childnode.toElement().attributes();
			for (int i=0; i<(int)dm.count(); i++)
			{
				if (dm.item(i).nodeName().lower() == szAttrName.lower())
				{
					if (dm.item(i).nodeValue() == szAttrValue)
					{
						return childnode;
					}
				}
			}
		}
		childnode = childnode.nextSibling();
	}
	
	return ret;
}
//同上,只是一次查找时利用两个属性来共同查找
QDomNode CXMLReader::GetChildNode(QDomNode& DomNode, QString szNodeName, QString szAttr1Name, QString szAttr1Value, QString szAttr2Name, QString szAttr2Value)
{
	QDomNode childnode, ret;
	if (DomNode.isNull()) return ret;
	QDomElement childelement = DomNode.toElement();
	childnode = childelement.firstChild();
	while (!childnode.isNull())
	{
		if (childnode.isElement() && childnode.nodeName().lower() == szNodeName.lower())
		{
			QDomNamedNodeMap dm;
			dm = childnode.toElement().attributes();
			int iIndex1 = -1, iIndex2 = -1;
			for (int i=0; i<(int)dm.count(); i++)
			{
				if (dm.item(i).nodeName().lower() == szAttr1Name.lower()) iIndex1 = i;
				else if (dm.item(i).nodeName().lower() == szAttr2Name.lower()) iIndex2 = i;
			}
			if (iIndex1 == -1 || iIndex2 == -1) return ret;
			if (dm.item(iIndex1).nodeValue() == szAttr1Value &&
				dm.item(iIndex2).nodeValue() == szAttr2Value)
			{
				return childnode;
			}
		}
		childnode = childnode.nextSibling();
	}
	
	return ret;
}
//取得Node的属性szAttrName的值szAttrValue(用来返回值)
bool CXMLReader::GetNodeAttr(QDomNode& Node, QString szAttrName, QString& szAttrValue)
{
	szAttrValue = "";
	if (Node.isNull()) return false;
	QDomNamedNodeMap dm = Node.toElement().attributes();
	
	for (int i=0; i<(int)dm.count(); i++)
    {
		if (dm.item(i).nodeName().lower() == szAttrName.lower())
		{
			QString sztmp = dm.item(i).nodeValue();
			QTextCodec* codec = QTextCodec::codecForName("GB2312");
			QCString szutf = codec->fromUnicode(sztmp);
			szAttrValue = szutf.data();
			
			return true;
		}
    }
	return false;
}
//取得Node下子节点的个数
int CXMLReader::GetChildNodeCount(QDomNode& Node)
{
	if (Node.isNull()) return 0;
	if (!Node.hasChildNodes()) return 0;
	QDomNodeList nodelist = Node.childNodes();
	return nodelist.count();
}

//在szDomName节点的最后插入子节点szNodeName
QDomNode CXMLReader::InsertDomNode(QString szDomName, QString szNodeName)
{
	m_Mutex.lock();
	QDomElement root = m_DomTree.documentElement();
	QDomNode node, DomNode, ret;
	node = root.firstChild();
	while (!node.isNull())
	{
		if (node.isElement() && node.nodeName().lower() == szDomName.lower())
		{
			QDomElement childelement = m_DomTree.createElement(szNodeName);
			node.appendChild(childelement);
			DomNode = node.lastChild();
			m_Mutex.unlock();
			return DomNode;
		}
		node = node.nextSibling();
	}
	m_Mutex.unlock();
	return ret;
}
//在DomNode节点的最后插入子节点szChildName,返回新插入子节点的指针
QDomNode CXMLReader::InsertChildNode(QDomNode& DomNode, QString szChildName)
{
	m_Mutex.lock();
	QDomElement childelement = m_DomTree.createElement(szChildName);
	DomNode.appendChild(childelement);
	m_Mutex.unlock();
	return DomNode.lastChild();
}
//在Node节点中添加或修改属性szAttrName,值为szAttrValue
bool CXMLReader::InsertNodeAttr(QDomNode& Node, QString szAttrName, QString szAttrValue)
{
	m_Mutex.lock();
	QDomElement childelement = Node.toElement();
	childelement.setAttribute(szAttrName, szAttrValue);
	m_Mutex.unlock();
	return true;
}