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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package sun.nio.fs;

import java.nio.file.CopyOption;
import java.nio.file.OpenOption;
import java.nio.file.WatchEvent;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

Provides support for handling JDK-specific OpenOption, CopyOption and WatchEvent.Modifier types.
/** * Provides support for handling JDK-specific OpenOption, CopyOption and * WatchEvent.Modifier types. */
public final class ExtendedOptions { // maps InternalOption to ExternalOption private static final Map<InternalOption<?>, Wrapper<?>> internalToExternal = new ConcurrentHashMap<>();
Wraps an option or modifier.
/** * Wraps an option or modifier. */
private static final class Wrapper<T> { private final Object option; private final T param; Wrapper(Object option, T param) { this.option = option; this.param = param; } T parameter() { return param; } }
The internal version of a JDK-specific OpenOption, CopyOption or WatchEvent.Modifier.
/** * The internal version of a JDK-specific OpenOption, CopyOption or * WatchEvent.Modifier. */
public static final class InternalOption<T> { InternalOption() { } private void registerInternal(Object option, T param) { Wrapper<T> wrapper = new Wrapper<T>(option, param); internalToExternal.put(this, wrapper); }
Register this internal option as a OpenOption.
/** * Register this internal option as a OpenOption. */
public void register(OpenOption option) { registerInternal(option, null); }
Register this internal option as a CopyOption.
/** * Register this internal option as a CopyOption. */
public void register(CopyOption option) { registerInternal(option, null); }
Register this internal option as a WatchEvent.Modifier.
/** * Register this internal option as a WatchEvent.Modifier. */
public void register(WatchEvent.Modifier option) { registerInternal(option, null); }
Register this internal option as a WatchEvent.Modifier with the given parameter.
/** * Register this internal option as a WatchEvent.Modifier with the * given parameter. */
public void register(WatchEvent.Modifier option, T param) { registerInternal(option, param); }
Returns true if the given option (or modifier) maps to this internal option.
/** * Returns true if the given option (or modifier) maps to this internal * option. */
public boolean matches(Object option) { Wrapper <?> wrapper = internalToExternal.get(this); if (wrapper == null) return false; else return option == wrapper.option; }
Returns the parameter object associated with this internal option.
/** * Returns the parameter object associated with this internal option. */
@SuppressWarnings("unchecked") public T parameter() { Wrapper<?> wrapper = internalToExternal.get(this); if (wrapper == null) return null; else return (T) wrapper.parameter(); } } // Internal equivalents of the options and modifiers defined in // package com.sun.nio.file public static final InternalOption<Void> INTERRUPTIBLE = new InternalOption<>(); public static final InternalOption<Void> NOSHARE_READ = new InternalOption<>(); public static final InternalOption<Void> NOSHARE_WRITE = new InternalOption<>(); public static final InternalOption<Void> NOSHARE_DELETE = new InternalOption<>(); public static final InternalOption<Void> FILE_TREE = new InternalOption<>(); public static final InternalOption<Void> DIRECT = new InternalOption<>(); public static final InternalOption<Integer> SENSITIVITY_HIGH = new InternalOption<>(); public static final InternalOption<Integer> SENSITIVITY_MEDIUM = new InternalOption<>(); public static final InternalOption<Integer> SENSITIVITY_LOW = new InternalOption<>(); }