C++/Qt/QDomElement
Содержание
Append child to QDomElement
Foundations of Qt Development\Chapter08\xmldomwrite\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QFile>
#include <QTextStream>
#include <QDomDocument>
#include <QDomElement>
#include <QDomText>
int main( int argc, char **argv )
{
QDomDocument document;
QDomElement foo = document.createElement( "foo" );
foo.setAttribute( "name", "FooName" );
QDomElement bar = document.createElement( "bar" );
bar.setAttribute( "name", "BarName" );
QDomText text = document.createTextNode( "Some text" );
document.appendChild( foo );
foo.appendChild( bar );
foo.appendChild( text );
QFile file( "simple.xml" );
if( !file.open( QIODevice::WriteOnly | QIODevice::Text ) )
{
qDebug( "Failed to open file for writing." );
return 0;
}
QTextStream stream( &file );
stream << document.toString();
file.close();
return 0;
}
Create DOM document with QDomDocument
Foundations of Qt Development\Chapter08\xmldommodify\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QFile>
#include <QTextStream>
#include <QDomDocument>
#include <QDomElement>
#include <QDomText>
int main( int argc, char **argv )
{
QFile inFile( "simple.xml" );
if( !inFile.open( QIODevice::ReadOnly | QIODevice::Text ) )
{
qDebug( "Failed to open file for reading." );
return 0;
}
QDomDocument document;
if( !document.setContent( &inFile ) )
{
qDebug( "Failed to parse the file into a DOM tree." );
inFile.close();
return 0;
}
inFile.close();
QDomElement documentElement = document.documentElement();
QDomNodeList elements = documentElement.elementsByTagName( "bar" );
if( elements.size() == 0 )
{
QDomElement bar = document.createElement( "bar" );
documentElement.insertBefore( bar, QDomNode() );
}
else if( elements.size() == 1 )
{
QDomElement bar = elements.at(0).toElement();
QDomElement baz = document.createElement( "baz" );
baz.setAttribute( "count", QString::number( bar.elementsByTagName( "baz" ).size() + 1 ) );
bar.appendChild( baz );
}
QFile outFile( "simple-modified.xml" );
if( !outFile.open( QIODevice::WriteOnly | QIODevice::Text ) )
{
qDebug( "Failed to open file for writing." );
return 0;
}
QTextStream stream( &outFile );
stream << document.toString();
outFile.close();
return 0;
}
Create text node
Foundations of Qt Development\Chapter08\xmldomwrite\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QFile>
#include <QTextStream>
#include <QDomDocument>
#include <QDomElement>
#include <QDomText>
int main( int argc, char **argv )
{
QDomDocument document;
QDomElement foo = document.createElement( "foo" );
foo.setAttribute( "name", "FooName" );
QDomElement bar = document.createElement( "bar" );
bar.setAttribute( "name", "BarName" );
QDomText text = document.createTextNode( "Some text" );
document.appendChild( foo );
foo.appendChild( bar );
foo.appendChild( text );
QFile file( "simple.xml" );
if( !file.open( QIODevice::WriteOnly | QIODevice::Text ) )
{
qDebug( "Failed to open file for writing." );
return 0;
}
QTextStream stream( &file );
stream << document.toString();
file.close();
return 0;
}
Create xml element and insert to DOM tree
Foundations of Qt Development\Chapter08\xmldommodify\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QFile>
#include <QTextStream>
#include <QDomDocument>
#include <QDomElement>
#include <QDomText>
int main( int argc, char **argv )
{
QFile inFile( "simple.xml" );
if( !inFile.open( QIODevice::ReadOnly | QIODevice::Text ) )
{
qDebug( "Failed to open file for reading." );
return 0;
}
QDomDocument document;
if( !document.setContent( &inFile ) )
{
qDebug( "Failed to parse the file into a DOM tree." );
inFile.close();
return 0;
}
inFile.close();
QDomElement documentElement = document.documentElement();
QDomNodeList elements = documentElement.elementsByTagName( "bar" );
if( elements.size() == 0 )
{
QDomElement bar = document.createElement( "bar" );
documentElement.insertBefore( bar, QDomNode() );
}
else if( elements.size() == 1 )
{
QDomElement bar = elements.at(0).toElement();
QDomElement baz = document.createElement( "baz" );
baz.setAttribute( "count", QString::number( bar.elementsByTagName( "baz" ).size() + 1 ) );
bar.appendChild( baz );
}
QFile outFile( "simple-modified.xml" );
if( !outFile.open( QIODevice::WriteOnly | QIODevice::Text ) )
{
qDebug( "Failed to open file for writing." );
return 0;
}
QTextStream stream( &outFile );
stream << document.toString();
outFile.close();
return 0;
}
Get attribute from QDomElement
Foundations of Qt Development\Chapter08\xmldomread\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QFile>
#include <QTextStream>
#include <QDomDocument>
#include <QDomElement>
#include <QDomText>
#include <QtDebug>
int main( int argc, char **argv )
{
QFile file( "simple.xml" );
if( !file.open( QIODevice::ReadOnly | QIODevice::Text ) )
{
qDebug( "Failed to open file for reading." );
return 0;
}
QDomDocument document;
if( !document.setContent( &file ) )
{
qDebug( "Failed to parse the file into a DOM tree." );
file.close();
return 0;
}
file.close();
QDomElement documentElement = document.documentElement();
QDomNode node = documentElement.firstChild();
while( !node.isNull() )
{
if( node.isElement() )
{
QDomElement element = node.toElement();
qDebug() << "ELEMENT" << element.tagName();
qDebug() << "ELEMENT ATTRIBUTE NAME" << element.attribute( "name", "not set" );
}
if( node.isText() )
{
QDomText text = node.toText();
qDebug() << text.data();
}
node = node.nextSibling();
}
return 0;
}