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/*
* Use is subject to the license terms.
*/
package com.sun.tools.xjc;
import com.sun.istack.SAXParseException2;
import com.sun.tools.xjc.api.ErrorListener;
import org.xml.sax.ErrorHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXParseException;
/**
* Implemented by the driver of the compiler engine to handle
* errors found during the compiliation.
*
*
* This class implements {@link ErrorHandler} so it can be
* passed to anywhere where {@link ErrorHandler} is expected.
*
*
* However, to make the error handling easy (and make it work
* with visitor patterns nicely),
* none of the methods on thi class throws {@link org.xml.sax.SAXException}.
* Instead, when the compilation needs to be aborted,
* it throws {@link AbortException}, which is unchecked.
*
*
* This also implements the externally visible {@link ErrorListener}
* so that we can reuse our internal implementation for testing and such.
*
* @author Kohsuke Kawaguchi ([email protected])
*/
public abstract class ErrorReceiver implements ErrorHandler, ErrorListener {
//
//
// convenience methods for callers
//
//
/**
* @param loc
* can be null if the location is unknown
*/
public final void error( Locator loc, String msg ) {
error( new SAXParseException2(msg,loc) );
}
public final void error( Locator loc, String msg, Exception e ) {
error( new SAXParseException2(msg,loc,e) );
}
public final void error( String msg, Exception e ) {
error( new SAXParseException2(msg,null,e) );
}
public void error(Exception e) {
error(e.getMessage(),e);
}
/**
* @param loc
* can be null if the location is unknown
*/
public final void warning( Locator loc, String msg ) {
warning( new SAXParseException(msg,loc) );
}
//
//
// ErrorHandler implementation, but can't throw SAXException
//
//
public abstract void error(SAXParseException exception) throws AbortException;
public abstract void fatalError(SAXParseException exception) throws AbortException;
public abstract void warning(SAXParseException exception) throws AbortException;
/**
* This method will be invoked periodically to allow {@link AbortException}
* to be thrown, especially when this is driven by some kind of GUI.
*/
public void pollAbort() throws AbortException {
}
/**
* Reports verbose messages to users.
*
* This method can be used to report additional non-essential
* messages. The implementation usually discards them
* unless some specific debug option is turned on.
*/
public abstract void info(SAXParseException exception) /*REVISIT:throws AbortException*/;
/**
* Reports a debug message to users.
*
* @see #info(SAXParseException)
*/
public final void debug( String msg ) {
info( new SAXParseException(msg,null) );
}
//
//
// convenience methods for derived classes
//
//
/**
* Returns the human readable string representation of the
* {@link org.xml.sax.Locator} part of the specified
* {@link SAXParseException}.
*
* @return non-null valid object.
*/
protected final String getLocationString( SAXParseException e ) {
if(e.getLineNumber()!=-1 || e.getSystemId()!=null) {
int line = e.getLineNumber();
return Messages.format( Messages.LINE_X_OF_Y,
line==-1?"?":Integer.toString( line ),
getShortName( e.getSystemId() ) );
} else {
return Messages.format( Messages.UNKNOWN_LOCATION );
}
}
/** Computes a short name of a given URL for display. */
private String getShortName( String url ) {
if(url==null)
return Messages.format( Messages.UNKNOWN_FILE );
// sometimes the user deals with a set of schems that reference each other
// in a complicated way, and end up importing two versions of the same schema.
// just printing the file name makes it very difficult to recognize of this problem.
// so I decided to change it back to print the full URL.
// int idx;
//
// // system Id can be URL, so we can't use File.separator
// idx = url.lastIndexOf('/');
// if(idx!=-1) return url.substring(idx+1);
// idx = url.lastIndexOf('\\');
// if(idx!=-1) return url.substring(idx+1);
return url;
}
}