Examples with ConstructorAccessor jdk.internal.reflect.ConstructorAccessor used on opensource projects

Example 1 with ConstructorAccessor

use of jdk.internal.reflect.ConstructorAccessor in project Bytecoder by mirkosertic.

the class Constructor method newInstance.

/**
 * Uses the constructor represented by this {@code Constructor} object to
 * create and initialize a new instance of the constructor's
 * declaring class, with the specified initialization parameters.
 * Individual parameters are automatically unwrapped to match
 * primitive formal parameters, and both primitive and reference
 * parameters are subject to method invocation conversions as necessary.
 *
 * <p>If the number of formal parameters required by the underlying constructor
 * is 0, the supplied {@code initargs} array may be of length 0 or null.
 *
 * <p>If the constructor's declaring class is an inner class in a
 * non-static context, the first argument to the constructor needs
 * to be the enclosing instance; see section 15.9.3 of
 * <cite>The Java&trade; Language Specification</cite>.
 *
 * <p>If the required access and argument checks succeed and the
 * instantiation will proceed, the constructor's declaring class
 * is initialized if it has not already been initialized.
 *
 * <p>If the constructor completes normally, returns the newly
 * created and initialized instance.
 *
 * @param initargs array of objects to be passed as arguments to
 * the constructor call; values of primitive types are wrapped in
 * a wrapper object of the appropriate type (e.g. a {@code float}
 * in a {@link java.lang.Float Float})
 *
 * @return a new object created by calling the constructor
 * this object represents
 *
 * @exception IllegalAccessException    if this {@code Constructor} object
 *              is enforcing Java language access control and the underlying
 *              constructor is inaccessible.
 * @exception IllegalArgumentException  if the number of actual
 *              and formal parameters differ; if an unwrapping
 *              conversion for primitive arguments fails; or if,
 *              after possible unwrapping, a parameter value
 *              cannot be converted to the corresponding formal
 *              parameter type by a method invocation conversion; if
 *              this constructor pertains to an enum type.
 * @exception InstantiationException    if the class that declares the
 *              underlying constructor represents an abstract class.
 * @exception InvocationTargetException if the underlying constructor
 *              throws an exception.
 * @exception ExceptionInInitializerError if the initialization provoked
 *              by this method fails.
 */
@CallerSensitive
// to ensure Reflection.getCallerClass optimization
@ForceInline
public T newInstance(Object... initargs) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
    if (!override) {
        Class<?> caller = Reflection.getCallerClass();
        checkAccess(caller, clazz, clazz, modifiers);
    }
    if ((clazz.getModifiers() & Modifier.ENUM) != 0)
        throw new IllegalArgumentException("Cannot reflectively create enum objects");
    // read volatile
    ConstructorAccessor ca = constructorAccessor;
    if (ca == null) {
        ca = acquireConstructorAccessor();
    }
    @SuppressWarnings("unchecked") T inst = (T) ca.newInstance(initargs);
    return inst;
}

Example 2 with ConstructorAccessor

use of jdk.internal.reflect.ConstructorAccessor in project Bytecoder by mirkosertic.

the class Constructor method acquireConstructorAccessor.

// NOTE that there is no synchronization used here. It is correct
// (though not efficient) to generate more than one
// ConstructorAccessor for a given Constructor. However, avoiding
// synchronization will probably make the implementation more
// scalable.
private ConstructorAccessor acquireConstructorAccessor() {
    // First check to see if one has been created yet, and take it
    // if so.
    ConstructorAccessor tmp = null;
    if (root != null)
        tmp = root.getConstructorAccessor();
    if (tmp != null) {
        constructorAccessor = tmp;
    } else {
        // Otherwise fabricate one and propagate it up to the root
        tmp = reflectionFactory.newConstructorAccessor(this);
        setConstructorAccessor(tmp);
    }
    return tmp;
}