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/*
*(c) Copyright QNX Software Systems Ltd. 2002.
* All Rights Reserved.
*
*/
package org.eclipse.cdt.launch.sourcelookup;
import java.io.IOException;
import java.io.StringReader;
import java.text.MessageFormat;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.xerces.dom.DocumentImpl;
import org.eclipse.cdt.debug.core.ICDTLaunchConfigurationConstants;
import org.eclipse.cdt.debug.core.sourcelookup.ICSourceLocator;
import org.eclipse.cdt.debug.core.sourcelookup.ISourceMode;
import org.eclipse.cdt.debug.internal.core.CDebugUtils;
import org.eclipse.cdt.debug.ui.sourcelookup.CUISourceLocator;
import org.eclipse.cdt.launch.internal.ui.LaunchUIPlugin;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.model.IPersistableSourceLocator;
import org.eclipse.debug.core.model.IStackFrame;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
/**
* The wrapper for the CUISourceLocator class.
*
* @since: Dec 11, 2002
*/
public class DefaultSourceLocator implements IPersistableSourceLocator, IAdaptable
{
private static final String ELEMENT_NAME = "PromptingSourceLocator";
private static final String ATTR_PROJECT = "project";
private static final String ATTR_MEMENTO = "memento";
/**
* Identifier for the 'Default C/C++ Source Locator' extension
* (value <code>"org.eclipse.cdt.launch.DefaultSourceLocator"</code>).
*/
public static final String ID_DEFAULT_SOURCE_LOCATOR = LaunchUIPlugin.getUniqueIdentifier() + ".DefaultSourceLocator"; //$NON-NLS-1$
private CUISourceLocator fSourceLocator = null;
private final static int ERROR = 1000; // ????
/**
* Constructor for DefaultSourceLocator.
*/
public DefaultSourceLocator()
{
}
/**
* Constructor for DefaultSourceLocator.
*/
public DefaultSourceLocator( CUISourceLocator locator )
{
fSourceLocator = locator;
}
/* (non-Javadoc)
* @see org.eclipse.debug.core.model.IPersistableSourceLocator#getMemento()
*/
public String getMemento() throws CoreException
{
if ( fSourceLocator != null )
{
Document doc = new DocumentImpl();
Element node = doc.createElement( ELEMENT_NAME );
doc.appendChild( node );
node.setAttribute( ATTR_PROJECT, fSourceLocator.getProject().getName() );
IPersistableSourceLocator psl = getPersistableSourceLocator();
if ( psl != null )
{
node.setAttribute( ATTR_MEMENTO, psl.getMemento() );
}
try
{
return CDebugUtils.serializeDocument( doc, " " );
}
catch( IOException e )
{
abort( "Unable to create memento for C/C++ source locator.", e );
}
}
return null;
}
/* (non-Javadoc)
* @see org.eclipse.debug.core.model.IPersistableSourceLocator#initializeFromMemento(String)
*/
public void initializeFromMemento( String memento ) throws CoreException
{
Exception ex = null;
try
{
Element root = null;
DocumentBuilder parser = DocumentBuilderFactory.newInstance().newDocumentBuilder();
StringReader reader = new StringReader( memento );
InputSource source = new InputSource( reader );
root = parser.parse( source ).getDocumentElement();
if ( !root.getNodeName().equalsIgnoreCase( ELEMENT_NAME ) )
{
abort( "Unable to restore prompting source locator - invalid format.", null );
}
String projectName = root.getAttribute( ATTR_PROJECT );
String data = root.getAttribute( ATTR_MEMENTO );
if ( isEmpty( projectName ) )
{
abort( "Unable to restore prompting source locator - invalid format.", null );
}
IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject( projectName );
if ( project != null )
{
fSourceLocator = new CUISourceLocator( project );
}
else
{
abort( MessageFormat.format( "Unable to restore prompting source locator - project {0} not found.", new String[] { projectName } ), null );
}
IPersistableSourceLocator psl = getPersistableSourceLocator();
if ( psl != null )
{
psl.initializeFromMemento( data );
}
else
{
abort( "Unable to restore C/C++ source locator - invalid format.", null );
}
return;
}
catch( ParserConfigurationException e )
{
ex = e;
}
catch( SAXException e )
{
ex = e;
}
catch( IOException e )
{
ex = e;
}
abort( "Exception occurred initializing source locator.", ex );
}
/* (non-Javadoc)
* @see org.eclipse.debug.core.model.IPersistableSourceLocator#initializeDefaults(ILaunchConfiguration)
*/
public void initializeDefaults( ILaunchConfiguration configuration ) throws CoreException
{
fSourceLocator = new CUISourceLocator( getProject( configuration ) );
}
/* (non-Javadoc)
* @see org.eclipse.debug.core.model.ISourceLocator#getSourceElement(IStackFrame)
*/
public Object getSourceElement( IStackFrame stackFrame )
{
return ( fSourceLocator != null ) ? fSourceLocator.getSourceElement( stackFrame ) : null;
}
private IProject getProject( ILaunchConfiguration configuration ) throws CoreException
{
String projectName = configuration.getAttribute( ICDTLaunchConfigurationConstants.ATTR_PROJECT_NAME, (String)null );
if ( !isEmpty( projectName ) )
{
IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject( projectName );
if ( project.exists() )
{
return project;
}
}
abort( MessageFormat.format( "Project \"{0}\" does not exist.", new String[] { projectName } ), null );
return null;
}
/* (non-Javadoc)
* @see org.eclipse.core.runtime.IAdaptable#getAdapter(Class)
*/
public Object getAdapter( Class adapter )
{
if ( fSourceLocator != null )
{
if ( adapter.equals( ICSourceLocator.class ) )
{
return fSourceLocator.getAdapter( adapter );
}
if ( adapter.equals( IResourceChangeListener.class ) )
{
return fSourceLocator.getAdapter( adapter );
}
if ( adapter.equals( ISourceMode.class ) )
{
return fSourceLocator.getAdapter( adapter );
}
}
return null;
}
private ICSourceLocator getCSourceLocator()
{
if ( fSourceLocator != null )
{
return (ICSourceLocator)fSourceLocator.getAdapter( ICSourceLocator.class );
}
return null;
}
private IPersistableSourceLocator getPersistableSourceLocator()
{
ICSourceLocator sl = getCSourceLocator();
return ( sl instanceof IPersistableSourceLocator ) ? (IPersistableSourceLocator)sl : null;
}
/**
* Throws an internal error exception
*/
private void abort( String message, Throwable e ) throws CoreException
{
IStatus s = new Status( IStatus.ERROR,
LaunchUIPlugin.getUniqueIdentifier(),
ERROR,
message,
e );
throw new CoreException( s );
}
private boolean isEmpty( String string )
{
return string == null || string.length() == 0;
}
}
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