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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $Id$
package scala.tools.util;
import java.util.HashSet;
/**
* This abstract class implements most aspects of a Reporter, only how
* things are displayed has to be implemented in subclasses.
*/
public abstract class AbstractReporter implements Reporter {
//########################################################################
// Private Fields
/** Log of error positions (used to avoid printing errors twice) */
private final HashSet positions;
/** Whether information messages should be issued */
private boolean verbose;
/** Whether warnings should be issued */
private boolean nowarn;
/** Whether a prompt should be displayed after errors and warnings */
private boolean prompt;
/** Number of warning issued totally */
private int warnings;
/** Number of errors issued totally */
private int errors;
//########################################################################
// Public Constructors
/** Initializes a new instance. */
public AbstractReporter() {
this.positions = new HashSet();
this.verbose = false;
this.nowarn = false;
this.prompt = false;
this.warnings = 0;
this.errors = 0;
}
//########################################################################
// Public Methods - Display
/** Displays the information. The position may be null. */
public abstract void displayInfo(Position position, String message);
/** Displays the warning. The position may be null. */
public abstract void displayWarning(Position position, String message);
/** Displays the error. The position may be null. */
public abstract void displayError(Position position, String message);
/** Displays a prompt. */
public abstract void displayPrompt();
//########################################################################
// Public Methods - Flags
public boolean verbose() {
return verbose;
}
public boolean nowarn() {
return nowarn;
}
public boolean prompt() {
return prompt;
}
public void verbose(boolean verbose) {
this.verbose = verbose;
}
public void nowarn(boolean nowarn) {
this.nowarn = nowarn;
}
public void prompt(boolean prompt) {
this.prompt = prompt;
}
//########################################################################
// Public Methods - Count
public int warnings() {
return warnings;
}
public int errors() {
return errors;
}
public void resetCounters() {
errors = 0;
warnings = 0;
}
//########################################################################
// Public Methods - Report
public void info(Position position, String message, boolean force) {
if (force || verbose) displayInfo(null, message);
}
public void warning(Position position, String message) {
boolean hidden = testAndLog(position);
if (nowarn) return;
if (!hidden || prompt) displayWarning(position, message);
if (!hidden) warnings++;
if (prompt) displayPrompt();
}
public void error(Position position, String message) {
boolean hidden = testAndLog(position);
if (!hidden || prompt) displayError(position, message);
if (!hidden) errors++;
if (prompt) displayPrompt();
}
//########################################################################
// Private Methods
/** Logs a position and returns true if it was already logged. */
private boolean testAndLog(Position position) {
if (position == null) return false;
if (position.getColumnNumber() == 0) return false;
if (positions.contains(position)) return true;
positions.add(position);
return false;
}
//########################################################################
}
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