Access.java
/*-
* #%L
* io.earcam.instrumental.module.jpms
* %%
* Copyright (C) 2018 earcam
* %%
* SPDX-License-Identifier: (BSD-3-Clause OR EPL-1.0 OR Apache-2.0 OR MIT)
*
* You <b>must</b> choose to accept, in full - any individual or combination of
* the following licenses:
* <ul>
* <li><a href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</a></li>
* <li><a href="https://www.eclipse.org/legal/epl-v10.html">EPL-1.0</a></li>
* <li><a href="https://www.apache.org/licenses/LICENSE-2.0">Apache-2.0</a></li>
* <li><a href="https://opensource.org/licenses/MIT">MIT</a></li>
* </ul>
* #L%
*/
package io.earcam.instrumental.module.jpms;
import static java.util.EnumSet.noneOf;
import static java.util.stream.Collectors.toCollection;
import java.util.EnumSet;
import java.util.Set;
import java.util.function.Predicate;
import java.util.stream.Collector;
final class Access {
/** Constant <code>ACC_NOT_REAL=-42</code> */
public static final int ACC_NOT_REAL = -42;
/** Constant <code>ACC_MODULE=0x8000</code> */
public static final int ACC_MODULE = 0x8000;
/** Constant <code>ACC_OPEN=0x0020</code> */
public static final int ACC_OPEN = 0x0020;
/** Constant <code>ACC_TRANSITIVE=0x0020</code> */
public static final int ACC_TRANSITIVE = 0x0020;
/** Constant <code>ACC_STATIC_PHASE=0x0040</code> */
public static final int ACC_STATIC_PHASE = 0x0040;
/** Constant <code>ACC_SYNTHETIC=0x1000</code> */
public static final int ACC_SYNTHETIC = 0x1000;
/** Constant <code>ACC_MANDATED=0x8000</code> */
public static final int ACC_MANDATED = 0x8000;
private static final Predicate<Modifier> EXCLUDE_NOT_REAL = m -> m.access() != ACC_NOT_REAL;
private Access()
{}
/**
* <p>
* access.
* </p>
*
* @param modifiers a {@link java.util.Set} object.
* @return a int.
*/
public static int access(Set<? extends Modifier> modifiers)
{
return modifiers.stream()
.filter(EXCLUDE_NOT_REAL)
.mapToInt(Modifier::access)
.reduce(0, Access::bitwiseOr);
}
/**
* <p>
* bitwiseOr.
* </p>
*
* @param a a int.
* @param b a int.
* @return a int.
*/
public static int bitwiseOr(int a, int b)
{
return a | b;
}
/**
* <p>
* modifiers.
* </p>
*
* @param modifierType a {@link java.lang.Class} object.
* @param access a int.
* @param <M> a M object.
* @return a {@link java.util.Set} object.
*/
public static <M extends Enum<M> & Modifier> Set<M> modifiers(Class<M> modifierType, int access)
{
return EnumSet.allOf(modifierType).stream()
.filter(EXCLUDE_NOT_REAL)
.filter(m -> m.inFlag(access))
.collect(toEnumSetOf(modifierType));
}
// This should be on Collectors...
private static <E extends Enum<E>> Collector<E, ?, EnumSet<E>> toEnumSetOf(Class<E> enumType)
{
return toCollection(() -> noneOf(enumType));
}
}