org.apache.commons.javaflow.examples.invokedynamic.SimpleDynamicLinkage.java Source code

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Here is the source code for org.apache.commons.javaflow.examples.invokedynamic.SimpleDynamicLinkage.java

Source

package org.apache.commons.javaflow.examples.invokedynamic;

import java.lang.invoke.CallSite;
import java.lang.invoke.ConstantCallSite;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;

import org.apache.commons.javaflow.api.continuable;
import org.apache.commons.javaflow.api.Continuation;

public class SimpleDynamicLinkage {

    @continuable
    static void sayHello() {
        System.out.println("There we go!");
        for (char c = 'A'; c < 'G'; c++)
            Continuation.suspend("Data" + c);
        System.out.println("CallSite continuation finished");
    }

    public static CallSite bootstrapDynamic(final MethodHandles.Lookup caller, final String name,
            final MethodType type) throws NoSuchMethodException, IllegalAccessException {
        final MethodHandles.Lookup lookup = MethodHandles.lookup();
        final Class<?> thisClass = lookup.lookupClass(); // (who am I?)
        final MethodHandle sayHello = lookup.findStatic(thisClass, "sayHello", MethodType.methodType(void.class));
        return new ConstantCallSite(sayHello.asType(type));
    }

}