com.sun.xml.ws.client.sei.ValueGetter Maven / Gradle / Ivy
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/*
* Copyright (c) 1997, 2019 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.xml.ws.client.sei;
import javax.jws.WebParam.Mode;
import javax.xml.ws.Holder;
/**
* Gets a value from an object that represents a parameter passed
* as a method argument.
*
*
* This abstraction hides the handling of {@link Holder}.
*
*
* {@link ValueGetter} is a stateless behavior encapsulation.
*
* @author Kohsuke Kawaguchi
*/
enum ValueGetter {
/**
* {@link ValueGetter} that works for {@link Mode#IN} parameter.
*
*
* Since it's the IN mode, the parameter is not a {@link Holder},
* therefore the parameter itself is a value.
*/
PLAIN() {
Object get(Object parameter) {
return parameter;
}
},
/**
* Creates {@link ValueGetter} that works for {@link Holder},
* which is {@link Mode#INOUT} or {@link Mode#OUT}.
*
*
* In those {@link Mode}s, the parameter is a {@link Holder},
* so the value to be sent is obtained by getting the value of the holder.
*/
HOLDER() {
Object get(Object parameter) {
if(parameter==null)
// the user is allowed to pass in null where a Holder is expected.
return null;
return ((Holder)parameter).value;
}
};
/**
* Gets the value to be sent, from a parameter given as a method argument.
* @param parameter that is passed by proxy
* @return if it holder then its value, otherise parameter itself
*/
abstract Object get(Object parameter);
}