Operation.java

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 * This file is available under and governed by the GNU General Public
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/*
   Copyright 2015 Attila Szegedi

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are
   met:
   * Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
   * Neither the name of the copyright holder nor the names of
     contributors may be used to endorse or promote products derived from
     this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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   PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
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   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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*/

package jdk.dynalink;

/**
 * An object that describes a dynamic operation. Dynalink defines a set of
 * standard operations with the {@link StandardOperation} class, as well as a
 * way to express the target {@link Namespace namespace(s)} of an operation
 * on an object using {@link NamespaceOperation} and finally a way to attach
 * a fixed target name to an operation using {@link NamedOperation}.
 * When presenting examples in this documentation, we will refer to standard
 * operations using their name (e.g. {@code GET}), to namespace operations
 * by separating their base operation with a colon from their namespace
 * (e.g. {@code GET:PROPERTY}), or in case of multiple namespaces we will
 * further separate those with the vertical line character (e.g.
 * {@code GET:PROPERTY|ELEMENT}), and finally we will refer to named operations
 * by separating the base operation and the name with the colon character (e.g.
 * {@code GET:PROPERTY|ELEMENT:color}).
 */
public interface Operation {
    /**
     * Returns a {@link NamespaceOperation} using this operation as its base.
     * @param namespace the namespace that is the target of the namespace operation.
     * @return a {@link NamespaceOperation} with this operation as its base and the specified
     * namespace as its target.
     * @throws IllegalArgumentException if this operation is already a namespace operation or a named operation.
     * @throws NullPointerException if {@code namespace} is null.
     */
    default NamespaceOperation withNamespace(final Namespace namespace) {
        return withNamespaces(namespace);
    }

    /**
     * Returns a {@link NamespaceOperation} using this operation as its base.
     * @param namespaces the namespaces that are the target of the namespace operation.
     * @return a {@link NamespaceOperation} with this operation as its base and the specified
     * namespaces as its targets.
     * @throws IllegalArgumentException if this operation is already a namespace operation or a named operation.
     * @throws NullPointerException if {@code namespace} or any of its elements is null.
     */
    default NamespaceOperation withNamespaces(final Namespace... namespaces) {
        return new NamespaceOperation(this, namespaces);
    }

    /**
     * Returns a {@link NamedOperation} using this operation as its base.
     * @param name the name that is the target of the named operation.
     * @return a {@link NamedOperation} with this operation as its base and the specified name.
     * @throws IllegalArgumentException if this operation is already a named operation.
     * @throws NullPointerException if {@code name} is null.
     */
    default NamedOperation named(final Object name) {
        return new NamedOperation(this, name);
    }
}