jcdiagnostic.java

是一款用JAVA 编写的编译器 具有很强的编译功能

            this.pos = pos;
        }
        
        public JCTree getTree() {
            return null;
        }
        
        public int getStartPosition() {
            return pos;
        }
        
        public int getPreferredPosition() {
            return pos;
        }
        
        public int getEndPosition(Map<JCTree, Integer> endPosTable) {
            return pos;
        }
        
        private final int pos;
    }

    private final Messages messages;
    private final DiagnosticType type;
    private final DiagnosticSource source;
    private final DiagnosticPosition position;
    private final int line;
    private final int column;
    private final String key;
    private final Object[] args;
    private boolean mandatory;

    /**
     * Create a diagnostic object.
     * @param messages the resource for localized messages
     * @param dt the type of diagnostic
     * @param name the name of the source file, or null if none.
     * @param pos the character offset within the source file, if given.
     * @param key a resource key to identify the text of the diagnostic
     * @param args arguments to be included in the text of the diagnostic
     */
    protected JCDiagnostic(Messages messages, 
		       DiagnosticType dt, 
		       boolean mandatory, 
		       DiagnosticSource source, 
		       DiagnosticPosition pos, 
		       String key, 
		       Object ... args) {
	if (source == null && pos != null && pos.getPreferredPosition() != Position.NOPOS)
	    throw new IllegalArgumentException();

	this.messages = messages;
	this.type = dt;
	this.mandatory = mandatory;
	this.source = source;
	this.position = pos;
	this.key = key;
	this.args = args;

        int n = (pos == null ? Position.NOPOS : pos.getPreferredPosition());
	if (n == Position.NOPOS || source == null)
	    line = column = -1;
	else {
	    line = source.getLineNumber(n);
	    column = source.getColumnNumber(n);
	}
    }

    /**
     * Get the type of this diagnostic.
     * @return the type of this diagnostic
     */
    public DiagnosticType getType() {
	return type;
    }

    /**
     * Check whether or not this diagnostic is required to be shown.
     * @return true if this diagnostic is required to be shown.
     */
    public boolean isMandatory() {
	return mandatory;
    }

    /**
     * Get the name of the source file referred to by this diagnostic.
     * @return the name of the source referred to with this diagnostic, or null if none
     */
    public JavaFileObject getSource() {
        if (source == null)
            return null;
        else
            return source.getFile();
    }

    /**
     * Get the name of the source file referred to by this diagnostic.
     * @return the name of the source referred to with this diagnostic, or null if none
     */
    public String getSourceName() {
	JavaFileObject s = getSource();
        return s == null ? null : JavacFileManager.getJavacFileName(s);
    }

    /**
     * Get the source referred to by this diagnostic.
     * @return the source referred to with this diagnostic, or null if none
     */
    public DiagnosticSource getDiagnosticSource() {
	return source;
    }

    protected int getIntStartPosition() {
        return (position == null ? Position.NOPOS : position.getStartPosition());
    }

    protected int getIntPosition() {
	return (position == null ? Position.NOPOS : position.getPreferredPosition());
    }

    protected int getIntEndPosition() {
        return (position == null ? Position.NOPOS : position.getEndPosition(source.getEndPosTable()));
    }

    public long getStartPosition() {
        return getIntStartPosition();
    }

    public long getPosition() {
	return getIntPosition();
    }

    public long getEndPosition() {
        return getIntEndPosition();
    }

    /**
     * Get the line number within the source referred to by this diagnostic.
     * @return  the line number within the source referred to by this diagnostic
     */
    public long getLineNumber() {
	return line;
    }

    /**
     * Get the column number within the line of source referred to by this diagnostic.
     * @return  the column number within the line of source referred to by this diagnostic
     */
    public long getColumnNumber() {
	return column;
    }

    /**
     * Get the arguments to be included in the text of the diagnostic.
     * @return  the arguments to be included in the text of the diagnostic
     */
    public Object[] getArgs() {
	return args;
    }

    /**
     * Get the prefix string associated with this type of diagnostic.
     * @return the prefix string associated with this type of diagnostic
     */
    public String getPrefix() {
	return getPrefix(type);
    }

    /**
     * Get the prefix string associated with a particular type of diagnostic.
     * @return the prefix string associated with a particular type of diagnostic
     */
    public String getPrefix(DiagnosticType dt) {
	switch (dt) {
	case FRAGMENT: return "";
	case NOTE:     return getLocalizedString("compiler.note.note");
	case WARNING:  return getLocalizedString("compiler.warn.warning");
	case ERROR:    return getLocalizedString("compiler.err.error");
	default:
	    throw new AssertionError("Unknown diagnostic type: " + dt);
	}
    }

    /**
     * Return the standard presentation of this diagnostic.
     */
    public String toString() {
        if (defaultFormatter == null) {
            defaultFormatter =
                new DiagnosticFormatter();
        }
        return defaultFormatter.format(this);
    }

    private static DiagnosticFormatter defaultFormatter;

    private static final String messageBundleName =
	"com.sun.tools.javac.resources.compiler";

    private String getLocalizedString(String key, Object... args) {
	String[] strings = new String[args.length];
	for (int i = 0; i < strings.length; i++) {
	    Object arg = args[i];
	    if (arg == null)
		strings[i] = null;
	    else if (arg instanceof JCDiagnostic)
		strings[i] = ((JCDiagnostic) arg).getMessage(null);
	    else
		strings[i] = arg.toString();
	}

	return messages.getLocalizedString(key, (Object[]) strings);
    }

    // Methods for javax.tools.Diagnostic

    public Diagnostic.Kind getKind() {
	switch (type) {
	case NOTE:
            return Diagnostic.Kind.NOTE;
	case WARNING:
            return mandatory ? Diagnostic.Kind.MANDATORY_WARNING
                             : Diagnostic.Kind.WARNING;
	case ERROR:
            return Diagnostic.Kind.ERROR;
	default:
            return Diagnostic.Kind.OTHER;
	}
    }

    public String getCode() {
	return key;
    }

    public String getMessage(Locale locale) {
        // RFE 6406133: JCDiagnostic.getMessage ignores locale argument
        return getLocalizedString(key, args);
    }

}