com.sun.source.tree.LineMap#getColumnNumber ( )源码实例Demo

public boolean run(DocletEnvironment root) {
    DocTrees trees = root.getDocTrees();

    SourcePositions sourcePositions = trees.getSourcePositions();
    for (TypeElement klass : ElementFilter.typesIn(root.getIncludedElements())) {
        for (ExecutableElement method : getMethods(klass)) {
            if (method.getSimpleName().toString().equals("tabbedMethod")) {
                TreePath path = trees.getPath(method);
                CompilationUnitTree cu = path.getCompilationUnit();
                long pos = sourcePositions.getStartPosition(cu, path.getLeaf());
                LineMap lineMap = cu.getLineMap();
                long columnNumber = lineMap.getColumnNumber(pos);
                if (columnNumber == 9) {
                    System.out.println(columnNumber + ": OK!");
                    return true;
                } else {
                    System.err.println(columnNumber + ": wrong tab expansion");
                    return false;
                }
            }
        }
    }
    return false;
}
 

private boolean testStatement(StringWriter writer, SourcePositions sp, String text, CompilationUnitTree cut, Tree statement) {
    if (statement == null) {
        return true;
    }
    int start = (int) sp.getStartPosition(cut, statement);
    int end = (int) sp.getEndPosition(cut, statement);
    char ch = text.charAt(end - 1);
    SourceCodeAnalysis.Completeness expected = COMPLETE;
    LineMap lineMap = cut.getLineMap();
    int row = (int) lineMap.getLineNumber(start);
    int column = (int) lineMap.getColumnNumber(start);
    switch (ch) {
        case ',':
        case ';':
            expected = (statement instanceof ExpressionStatementTree)
                    ? COMPLETE
                    : COMPLETE_WITH_SEMI;
            --end;
            break;
        case '}':
            break;
        default:
            writer.write(String.format("Unexpected end: row %d, column %d: '%c' -- %s\n",
                    row, column, ch, text.substring(start, end)));
            return true;
    }
    String unit = text.substring(start, end);
    SourceCodeAnalysis.CompletionInfo ci = getAnalysis().analyzeCompletion(unit);
    if (ci.completeness() != expected) {
        if (expected == COMPLETE_WITH_SEMI && (ci.completeness() == CONSIDERED_INCOMPLETE || ci.completeness() == EMPTY)) {
            writer.write(String.format("Empty statement: row %d, column %d: -- %s\n",
                    start, end, unit));
        } else {
            writer.write(String.format("Expected %s got %s: '%s'  row %d, column %d: -- %s\n",
                    expected, ci.completeness(), unit, row, column, unit));
            return false;
        }
    }
    return true;
}
 

public static Position createPosition(LineMap lm, int offset) {
    return new Position((int) lm.getLineNumber(offset) - 1,
                        (int) lm.getColumnNumber(offset) - 1);
}