Example usage for javax.tools Diagnostic getLineNumber

Introduction

In this page you can find the example usage for javax.tools Diagnostic getLineNumber.

Prototype

long getLineNumber();

Source Link

Document

Returns the line number of the character offset returned by #getPosition() .

Usage

From source file:zhwb.study.compiler.CachedCompiler.java

public Map<String, byte[]> compileFromJava(String className, String javaCode) {
    Iterable<? extends JavaFileObject> compilationUnits;
    if (sourceDir != null) {
        String filename = className.replaceAll("\\.", '\\' + File.separator) + ".java";
        File file = new File(sourceDir, filename);
        writeText(file, javaCode);//  w ww  . j  av a  2 s .c o  m
        compilationUnits = CompilerUtils.s_standardJavaFileManager.getJavaFileObjects(file);

    } else {
        javaFileObjects.add(new JavaSourceFromString(className, javaCode));
        compilationUnits = javaFileObjects;
    }
    DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>();

    // reuse the same file manager to allow caching of jar files
    Boolean status = CompilerUtils.s_compiler
            .getTask(null, CompilerUtils.s_fileManager, diagnostics, null, null, compilationUnits).call();
    if (!status) {//If compilation error occurs
        /*Iterate through each compilation problem and print it*/
        StringBuilder sb = new StringBuilder();
        sb.append(StringUtils.LF);
        for (Diagnostic diagnostic : diagnostics.getDiagnostics()) {
            sb.append(String.format("Error on line %d in %s", diagnostic.getLineNumber(), diagnostic))
                    .append(StringUtils.LF);
        }
        throw new IllegalStateException(String.format("compile error, %s", sb.toString()));
    }
    return CompilerUtils.s_fileManager.getAllBuffers();
}