Examples with JavaSnippetCompiler org.knime.base.node.jsnippet.util.JavaSnippetCompiler used on opensource projects

Example 1 with JavaSnippetCompiler

use of org.knime.base.node.jsnippet.util.JavaSnippetCompiler in project knime-core by knime.

the class JSnippetParser method parse.

/**
 * {@inheritDoc}
 */
@Override
public ParseResult parse(final RSyntaxDocument doc, final String style) {
    assert m_snippet.getDocument() == doc;
    JavaSnippetCompiler compiler = new JavaSnippetCompiler(m_snippet);
    StringWriter log = new StringWriter();
    DiagnosticCollector<JavaFileObject> digsCollector = new DiagnosticCollector<>();
    CompilationTask compileTask = null;
    try {
        compileTask = compiler.getTask(log, digsCollector);
    } catch (IOException e) {
        LOGGER.error("Cannot create an compile task.", e);
        return new DefaultParseResult(this);
    }
    compileTask.call();
    DefaultParseResult parseResult = new DefaultParseResult(this);
    parseResult.setError(null);
    for (Diagnostic<? extends JavaFileObject> d : digsCollector.getDiagnostics()) {
        boolean isSnippet = m_snippet.isSnippetSource(d.getSource());
        if (isSnippet) {
            DefaultParserNotice notice = new DefaultParserNotice(this, d.getMessage(Locale.US), (int) d.getLineNumber(), (int) d.getStartPosition(), (int) (d.getEndPosition() - d.getStartPosition() + 1));
            if (d.getKind().equals(Kind.ERROR)) {
                notice.setLevel(ParserNotice.Level.ERROR);
            // LOGGER.error(d.getMessage(Locale.US));
            } else if (d.getKind().equals(Kind.WARNING)) {
                notice.setLevel(ParserNotice.Level.WARNING);
            // LOGGER.warn(d.getMessage(Locale.US));
            } else {
                notice.setLevel(ParserNotice.Level.INFO);
            // LOGGER.debug(d.getMessage(Locale.US));
            }
            parseResult.addNotice(notice);
        }
    }
    return parseResult;
}

Example 2 with JavaSnippetCompiler

use of org.knime.base.node.jsnippet.util.JavaSnippetCompiler in project knime-core by knime.

the class JavaSnippet method createSnippetClass.

/**
 * Create the class file of the snippet.
 *
 * Creates a URLClassLoader which may open jar files referenced by the Java Snippet class. Make sure to match every
 * call to this method with a call to {@link #close()} in order for KNIME to be able to clean up .jar files that
 * were downloaded from URLs.
 *
 * @return the compiled snippet
 */
@SuppressWarnings("unchecked")
private Class<? extends AbstractJSnippet> createSnippetClass() {
    JavaSnippetCompiler compiler = new JavaSnippetCompiler(this);
    /* Recompile/Reload either if the code changed or the class loader has been closed since */
    if (m_classLoader != null && m_snippetCache.isValid(getDocument())) {
        if (!m_snippetCache.hasCustomFields()) {
            return m_snippetCache.getSnippetClass();
        }
    } else {
        // recompile
        m_snippetCache.invalidate();
        StringWriter log = new StringWriter();
        DiagnosticCollector<JavaFileObject> digsCollector = new DiagnosticCollector<>();
        CompilationTask compileTask = null;
        try {
            compileTask = compiler.getTask(log, digsCollector);
        } catch (IOException e) {
            throw new IllegalStateException("Compile with errors: " + e.getMessage(), e);
        }
        boolean success = compileTask.call();
        if (!success) {
            StringBuilder msg = new StringBuilder();
            msg.append("Compile with errors:\n");
            for (Diagnostic<? extends JavaFileObject> d : digsCollector.getDiagnostics()) {
                boolean isSnippet = this.isSnippetSource(d.getSource());
                if (isSnippet && d.getKind().equals(javax.tools.Diagnostic.Kind.ERROR)) {
                    long line = d.getLineNumber();
                    if (line != Diagnostic.NOPOS) {
                        msg.append("Error in line " + line + ": ");
                    } else {
                        msg.append("Error: ");
                    }
                    msg.append(d.getMessage(Locale.US));
                    msg.append('\n');
                }
            }
            throw new IllegalStateException(msg.toString());
        }
    }
    try {
        close();
        final LinkedHashSet<ClassLoader> customTypeClassLoaders = new LinkedHashSet<>();
        customTypeClassLoaders.add(JavaSnippet.class.getClassLoader());
        for (final InCol col : m_fields.getInColFields()) {
            customTypeClassLoaders.addAll(getClassLoadersFor(col.getConverterFactoryId()));
        }
        for (final OutCol col : m_fields.getOutColFields()) {
            customTypeClassLoaders.addAll(getClassLoadersFor(col.getConverterFactoryId()));
        }
        /* Add class loaders of additional bundles */
        customTypeClassLoaders.addAll(getAdditionalBundlesClassLoaders());
        // remove core class loader:
        // (a) it's referenced via JavaSnippet.class classloader and
        // (b) it would collect buddies when used directly (see support ticket #1943)
        customTypeClassLoaders.remove(DataCellToJavaConverterRegistry.class.getClassLoader());
        final MultiParentClassLoader customTypeLoader = new MultiParentClassLoader(customTypeClassLoaders.stream().toArray(ClassLoader[]::new));
        // TODO (Next version bump) change return value of createClassLoader instead of cast
        m_classLoader = (URLClassLoader) compiler.createClassLoader(customTypeLoader);
        Class<? extends AbstractJSnippet> snippetClass = (Class<? extends AbstractJSnippet>) m_classLoader.loadClass("JSnippet");
        m_snippetCache.update(getDocument(), snippetClass, m_settings);
        return snippetClass;
    } catch (ClassNotFoundException e) {
        throw new IllegalStateException("Could not load class file.", e);
    } catch (IOException e) {
        throw new IllegalStateException("Could not load jar files.", e);
    }
}