Example usage for java.lang.invoke SerializedLambda getFunctionalInterfaceMethodSignature

Introduction

In this page you can find the example usage for java.lang.invoke SerializedLambda getFunctionalInterfaceMethodSignature.

Prototype

public String getFunctionalInterfaceMethodSignature() 

Source Link

Document

Get the signature of the primary method for the functional interface to which this lambda has been converted.

Usage

From source file:org.lambdamatic.analyzer.LambdaExpressionAnalyzer.java

/**
 * Returns the {@link SerializedLambdaInfo} for the given {@code expression}
 * //from   w  ww  . j  a v a  2  s  . co  m
 * @param expression the expression to analyze.
 * @return the corresponding {@link SerializedLambda}
 * @throws AnalyzeException if something wrong happened (a {@link NoSuchMethodException},
 *         {@link IllegalArgumentException} or {@link InvocationTargetException} exception
 *         occurred).
 * 
 * @see http ://docs.oracle.com/javase/8/docs/api/java/lang/invoke/SerializedLambda.html
 * @see http ://stackoverflow.com/questions/21860875/printing-debug-info-on-errors
 *      -with-java-8-lambda-expressions/21879031 #21879031
 */
private static SerializedLambdaInfo getSerializedLambdaInfo(final Object expression) {
    final Class<?> cl = expression.getClass();
    try {
        final Method m = cl.getDeclaredMethod("writeReplace");
        m.setAccessible(true);
        final Object result = m.invoke(expression);
        if (result instanceof SerializedLambda) {
            final SerializedLambda serializedLambda = (SerializedLambda) result;
            LOGGER.debug(" Lambda FunctionalInterface: {}.{} ({})",
                    serializedLambda.getFunctionalInterfaceClass(),
                    serializedLambda.getFunctionalInterfaceMethodName(),
                    serializedLambda.getFunctionalInterfaceMethodSignature());
            LOGGER.debug(" Lambda Implementation: {}.{} ({})", serializedLambda.getImplClass(),
                    serializedLambda.getImplMethodName(), serializedLambda.getImplMethodSignature());
            IntStream.range(0, serializedLambda.getCapturedArgCount())
                    .forEach(i -> LOGGER.debug("  with Captured Arg(" + i + "): '"
                            + serializedLambda.getCapturedArg(i)
                            + ((serializedLambda.getCapturedArg(i) != null)
                                    ? "' (" + serializedLambda.getCapturedArg(i).getClass().getName() + ")"
                                    : "")));
            return new SerializedLambdaInfo(serializedLambda);
        }
    } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
        throw new AnalyzeException("Failed to find the Serialized form for the given Lambda Expression", e);
    }
    return null;
}

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