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@@ -0,0 +1,124 @@
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+/*
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+ * Password Management Servlets (PWM)
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+ * http://www.pwm-project.org
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+ *
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+ * Copyright (c) 2006-2009 Novell, Inc.
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+ * Copyright (c) 2009-2021 The PWM Project
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+ *
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+ * Licensed under the Apache License, Version 2.0 (the "License");
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+ * you may not use this file except in compliance with the License.
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+ * You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+package password.pwm.util.java;
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+
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+import java.util.Collections;
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+import java.util.EnumSet;
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+import java.util.Optional;
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+import java.util.Set;
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+import java.util.function.Consumer;
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+import java.util.function.Predicate;
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+import java.util.stream.Collectors;
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+import java.util.stream.Stream;
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+
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+public final class EnumUtil
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+{
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+ private EnumUtil()
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+ {
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+ }
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+
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+ public static <E extends Enum<E>> Optional<E> readEnumFromCaseIgnoreString( final Class<E> enumClass, final String input )
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+ {
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+ return readEnumFromPredicate( enumClass, loopValue -> loopValue.name().equalsIgnoreCase( input ) );
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+ }
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+
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+ public static <E extends Enum<E>> Optional<E> readEnumFromPredicate( final Class<E> enumClass, final Predicate<E> match )
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+ {
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+ if ( match == null )
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+ {
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+ return Optional.empty();
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+ }
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+
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+ if ( enumClass == null || !enumClass.isEnum() )
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+ {
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+ return Optional.empty();
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+ }
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+
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+ return enumStream( enumClass ).filter( match ).findFirst();
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+ }
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+
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+ public static <E extends Enum<E>> Set<E> readEnumsFromPredicate( final Class<E> enumClass, final Predicate<E> match )
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+ {
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+ if ( match == null )
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+ {
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+ return Collections.emptySet();
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+ }
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+
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+ if ( enumClass == null || !enumClass.isEnum() )
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+ {
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+ return Collections.emptySet();
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+ }
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+
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+ return enumStream( enumClass ).filter( match ).collect( Collectors.toUnmodifiableSet() );
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+ }
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+
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+ public static <E extends Enum<E>> Optional<E> readEnumFromString( final Class<E> enumClass, final String input )
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+ {
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+ if ( StringUtil.isEmpty( input ) )
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+ {
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+ return Optional.empty();
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+ }
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+
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+ if ( enumClass == null || !enumClass.isEnum() )
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+ {
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+ return Optional.empty();
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+ }
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+
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+ try
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+ {
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+ return Optional.of( Enum.valueOf( enumClass, input ) );
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+ }
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+ catch ( final IllegalArgumentException e )
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+ {
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+ /* noop */
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+ }
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+
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+ return Optional.empty();
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+ }
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+
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+ public static <E extends Enum<E>> boolean enumArrayContainsValue( final E[] enumArray, final E enumValue )
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+ {
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+ if ( enumArray == null || enumArray.length == 0 )
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+ {
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+ return false;
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+ }
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+
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+ for ( final E loopValue : enumArray )
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+ {
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+ if ( loopValue == enumValue )
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+ {
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+ return true;
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+ }
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+ }
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+
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+ return false;
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+ }
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+
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+ public static <E extends Enum<E>> Stream<E> enumStream( final Class<E> enumClass )
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+ {
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+ return EnumSet.allOf( enumClass ).stream();
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+ }
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+
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+ public static <E extends Enum<E>> void forEach( final Class<E> enumClass, final Consumer<E> consumer )
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+ {
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+ EnumSet.allOf( enumClass ).forEach( consumer );
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+ }
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+}
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