Sort methods.
This commit is contained in:
Gary Gregory
parent
be1536fe56
commit
619a7024c4
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@ -39,72 +39,149 @@ public class EnumUtils {
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private static final String ENUM_CLASS_MUST_BE_DEFINED = "EnumClass must be defined.";
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/**
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* This constructor is public to permit tools that require a JavaBean
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* instance to operate.
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* Validate {@code enumClass}.
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* @param <E> the type of the enumeration
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* @param enumClass to check
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* @return {@code enumClass}
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* @throws NullPointerException if {@code enumClass} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class
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* @since 3.2
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*/
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public EnumUtils() {
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private static <E extends Enum<E>> Class<E> asEnum(final Class<E> enumClass) {
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Validate.notNull(enumClass, ENUM_CLASS_MUST_BE_DEFINED);
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Validate.isTrue(enumClass.isEnum(), S_DOES_NOT_SEEM_TO_BE_AN_ENUM_TYPE, enumClass);
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return enumClass;
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}
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/**
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* <p>Gets the {@code Map} of enums by name.</p>
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*
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* <p>This method is useful when you need a map of enums by name.</p>
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*
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* Validate that {@code enumClass} is compatible with representation in a {@code long}.
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* @param <E> the type of the enumeration
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* @param enumClass the class of the enum to query, not null
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* @return the modifiable map of enum names to enums, never null
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* @param enumClass to check
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* @return {@code enumClass}
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* @throws NullPointerException if {@code enumClass} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class or has more than 64 values
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* @since 3.0.1
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*/
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public static <E extends Enum<E>> Map<String, E> getEnumMap(final Class<E> enumClass) {
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final Map<String, E> map = new LinkedHashMap<>();
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for (final E e: enumClass.getEnumConstants()) {
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map.put(e.name(), e);
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}
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return map;
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private static <E extends Enum<E>> Class<E> checkBitVectorable(final Class<E> enumClass) {
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final E[] constants = asEnum(enumClass).getEnumConstants();
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Validate.isTrue(constants.length <= Long.SIZE, CANNOT_STORE_S_S_VALUES_IN_S_BITS,
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Integer.valueOf(constants.length), enumClass.getSimpleName(), Integer.valueOf(Long.SIZE));
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return enumClass;
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}
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/**
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* <p>Gets the {@code List} of enums.</p>
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* <p>Creates a long bit vector representation of the given array of Enum values.</p>
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*
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* <p>This method is useful when you need a list of enums rather than an array.</p>
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* <p>This generates a value that is usable by {@link EnumUtils#processBitVector}.</p>
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*
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* <p>Do not use this method if you have more than 64 values in your Enum, as this
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* would create a value greater than a long can hold.</p>
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*
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* @param enumClass the class of the enum we are working with, not {@code null}
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* @param values the values we want to convert, not {@code null}
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* @param <E> the type of the enumeration
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* @param enumClass the class of the enum to query, not null
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* @return the modifiable list of enums, never null
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* @return a long whose value provides a binary representation of the given set of enum values.
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* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class or has more than 64 values
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* @since 3.0.1
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* @see #generateBitVectors(Class, Iterable)
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*/
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public static <E extends Enum<E>> List<E> getEnumList(final Class<E> enumClass) {
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return new ArrayList<>(Arrays.asList(enumClass.getEnumConstants()));
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@SafeVarargs
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public static <E extends Enum<E>> long generateBitVector(final Class<E> enumClass, final E... values) {
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Validate.noNullElements(values);
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return generateBitVector(enumClass, Arrays.asList(values));
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}
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/**
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* <p>Checks if the specified name is a valid enum for the class.</p>
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* <p>Creates a long bit vector representation of the given subset of an Enum.</p>
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*
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* <p>This method differs from {@link Enum#valueOf} in that checks if the name is
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* a valid enum without needing to catch the exception.</p>
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* <p>This generates a value that is usable by {@link EnumUtils#processBitVector}.</p>
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*
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* <p>Do not use this method if you have more than 64 values in your Enum, as this
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* would create a value greater than a long can hold.</p>
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*
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* @param enumClass the class of the enum we are working with, not {@code null}
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* @param values the values we want to convert, not {@code null}, neither containing {@code null}
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* @param <E> the type of the enumeration
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* @param enumClass the class of the enum to query, not null
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* @param enumName the enum name, null returns false
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* @return true if the enum name is valid, otherwise false
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* @return a long whose value provides a binary representation of the given set of enum values.
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* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class or has more than 64 values,
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* or if any {@code values} {@code null}
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* @since 3.0.1
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* @see #generateBitVectors(Class, Iterable)
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*/
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public static <E extends Enum<E>> boolean isValidEnum(final Class<E> enumClass, final String enumName) {
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return getEnum(enumClass, enumName) != null;
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public static <E extends Enum<E>> long generateBitVector(final Class<E> enumClass, final Iterable<? extends E> values) {
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checkBitVectorable(enumClass);
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Validate.notNull(values);
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long total = 0;
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for (final E constant : values) {
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Validate.isTrue(constant != null, NULL_ELEMENTS_NOT_PERMITTED);
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total |= 1L << constant.ordinal();
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}
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return total;
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}
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/**
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* <p>Checks if the specified name is a valid enum for the class.</p>
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* <p>Creates a bit vector representation of the given subset of an Enum using as many {@code long}s as needed.</p>
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*
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* <p>This method differs from {@link Enum#valueOf} in that checks if the name is
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* a valid enum without needing to catch the exception
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* and performs case insensitive matching of the name.</p>
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* <p>This generates a value that is usable by {@link EnumUtils#processBitVectors}.</p>
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*
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* <p>Use this method if you have more than 64 values in your Enum.</p>
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*
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* @param enumClass the class of the enum we are working with, not {@code null}
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* @param values the values we want to convert, not {@code null}, neither containing {@code null}
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* @param <E> the type of the enumeration
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* @param enumClass the class of the enum to query, not null
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* @param enumName the enum name, null returns false
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* @return true if the enum name is valid, otherwise false
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* @since 3.8
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* @return a long[] whose values provide a binary representation of the given set of enum values
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* with least significant digits rightmost.
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* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class, or if any {@code values} {@code null}
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* @since 3.2
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*/
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public static <E extends Enum<E>> boolean isValidEnumIgnoreCase(final Class<E> enumClass, final String enumName) {
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return getEnumIgnoreCase(enumClass, enumName) != null;
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@SafeVarargs
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public static <E extends Enum<E>> long[] generateBitVectors(final Class<E> enumClass, final E... values) {
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asEnum(enumClass);
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Validate.noNullElements(values);
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final EnumSet<E> condensed = EnumSet.noneOf(enumClass);
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Collections.addAll(condensed, values);
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final long[] result = new long[(enumClass.getEnumConstants().length - 1) / Long.SIZE + 1];
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for (final E value : condensed) {
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result[value.ordinal() / Long.SIZE] |= 1L << (value.ordinal() % Long.SIZE);
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}
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ArrayUtils.reverse(result);
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return result;
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}
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/**
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* <p>Creates a bit vector representation of the given subset of an Enum using as many {@code long}s as needed.</p>
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*
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* <p>This generates a value that is usable by {@link EnumUtils#processBitVectors}.</p>
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*
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* <p>Use this method if you have more than 64 values in your Enum.</p>
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*
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* @param enumClass the class of the enum we are working with, not {@code null}
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* @param values the values we want to convert, not {@code null}, neither containing {@code null}
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* @param <E> the type of the enumeration
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* @return a long[] whose values provide a binary representation of the given set of enum values
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* with least significant digits rightmost.
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* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class, or if any {@code values} {@code null}
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* @since 3.2
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*/
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public static <E extends Enum<E>> long[] generateBitVectors(final Class<E> enumClass, final Iterable<? extends E> values) {
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asEnum(enumClass);
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Validate.notNull(values);
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final EnumSet<E> condensed = EnumSet.noneOf(enumClass);
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for (final E constant : values) {
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Validate.isTrue(constant != null, NULL_ELEMENTS_NOT_PERMITTED);
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condensed.add(constant);
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}
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final long[] result = new long[(enumClass.getEnumConstants().length - 1) / Long.SIZE + 1];
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for (final E value : condensed) {
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result[value.ordinal() / Long.SIZE] |= 1L << (value.ordinal() % Long.SIZE);
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}
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ArrayUtils.reverse(result);
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return result;
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}
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/**
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@ -188,117 +265,65 @@ public class EnumUtils {
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}
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/**
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* <p>Creates a long bit vector representation of the given subset of an Enum.</p>
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* <p>Gets the {@code List} of enums.</p>
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*
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* <p>This generates a value that is usable by {@link EnumUtils#processBitVector}.</p>
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* <p>This method is useful when you need a list of enums rather than an array.</p>
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*
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* <p>Do not use this method if you have more than 64 values in your Enum, as this
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* would create a value greater than a long can hold.</p>
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*
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* @param enumClass the class of the enum we are working with, not {@code null}
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* @param values the values we want to convert, not {@code null}, neither containing {@code null}
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* @param <E> the type of the enumeration
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* @return a long whose value provides a binary representation of the given set of enum values.
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* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class or has more than 64 values,
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* or if any {@code values} {@code null}
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* @since 3.0.1
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* @see #generateBitVectors(Class, Iterable)
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* @param enumClass the class of the enum to query, not null
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* @return the modifiable list of enums, never null
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*/
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public static <E extends Enum<E>> long generateBitVector(final Class<E> enumClass, final Iterable<? extends E> values) {
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checkBitVectorable(enumClass);
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Validate.notNull(values);
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long total = 0;
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for (final E constant : values) {
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Validate.isTrue(constant != null, NULL_ELEMENTS_NOT_PERMITTED);
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total |= 1L << constant.ordinal();
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}
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return total;
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public static <E extends Enum<E>> List<E> getEnumList(final Class<E> enumClass) {
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return new ArrayList<>(Arrays.asList(enumClass.getEnumConstants()));
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}
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/**
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* <p>Creates a bit vector representation of the given subset of an Enum using as many {@code long}s as needed.</p>
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* <p>Gets the {@code Map} of enums by name.</p>
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*
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* <p>This generates a value that is usable by {@link EnumUtils#processBitVectors}.</p>
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* <p>This method is useful when you need a map of enums by name.</p>
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*
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* <p>Use this method if you have more than 64 values in your Enum.</p>
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*
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* @param enumClass the class of the enum we are working with, not {@code null}
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* @param values the values we want to convert, not {@code null}, neither containing {@code null}
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* @param <E> the type of the enumeration
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* @return a long[] whose values provide a binary representation of the given set of enum values
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* with least significant digits rightmost.
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* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class, or if any {@code values} {@code null}
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* @since 3.2
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* @param enumClass the class of the enum to query, not null
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* @return the modifiable map of enum names to enums, never null
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*/
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public static <E extends Enum<E>> long[] generateBitVectors(final Class<E> enumClass, final Iterable<? extends E> values) {
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asEnum(enumClass);
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Validate.notNull(values);
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final EnumSet<E> condensed = EnumSet.noneOf(enumClass);
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for (final E constant : values) {
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Validate.isTrue(constant != null, NULL_ELEMENTS_NOT_PERMITTED);
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condensed.add(constant);
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public static <E extends Enum<E>> Map<String, E> getEnumMap(final Class<E> enumClass) {
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final Map<String, E> map = new LinkedHashMap<>();
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for (final E e: enumClass.getEnumConstants()) {
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map.put(e.name(), e);
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}
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final long[] result = new long[(enumClass.getEnumConstants().length - 1) / Long.SIZE + 1];
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for (final E value : condensed) {
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result[value.ordinal() / Long.SIZE] |= 1L << (value.ordinal() % Long.SIZE);
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}
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ArrayUtils.reverse(result);
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return result;
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return map;
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}
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/**
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* <p>Creates a long bit vector representation of the given array of Enum values.</p>
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* <p>Checks if the specified name is a valid enum for the class.</p>
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*
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* <p>This generates a value that is usable by {@link EnumUtils#processBitVector}.</p>
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* <p>This method differs from {@link Enum#valueOf} in that checks if the name is
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* a valid enum without needing to catch the exception.</p>
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*
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* <p>Do not use this method if you have more than 64 values in your Enum, as this
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* would create a value greater than a long can hold.</p>
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*
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* @param enumClass the class of the enum we are working with, not {@code null}
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* @param values the values we want to convert, not {@code null}
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* @param <E> the type of the enumeration
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* @return a long whose value provides a binary representation of the given set of enum values.
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* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class or has more than 64 values
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* @since 3.0.1
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* @see #generateBitVectors(Class, Iterable)
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* @param enumClass the class of the enum to query, not null
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* @param enumName the enum name, null returns false
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* @return true if the enum name is valid, otherwise false
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*/
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@SafeVarargs
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public static <E extends Enum<E>> long generateBitVector(final Class<E> enumClass, final E... values) {
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Validate.noNullElements(values);
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return generateBitVector(enumClass, Arrays.asList(values));
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public static <E extends Enum<E>> boolean isValidEnum(final Class<E> enumClass, final String enumName) {
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return getEnum(enumClass, enumName) != null;
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}
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/**
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* <p>Creates a bit vector representation of the given subset of an Enum using as many {@code long}s as needed.</p>
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* <p>Checks if the specified name is a valid enum for the class.</p>
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*
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* <p>This generates a value that is usable by {@link EnumUtils#processBitVectors}.</p>
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* <p>This method differs from {@link Enum#valueOf} in that checks if the name is
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* a valid enum without needing to catch the exception
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* and performs case insensitive matching of the name.</p>
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*
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* <p>Use this method if you have more than 64 values in your Enum.</p>
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*
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* @param enumClass the class of the enum we are working with, not {@code null}
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* @param values the values we want to convert, not {@code null}, neither containing {@code null}
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* @param <E> the type of the enumeration
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* @return a long[] whose values provide a binary representation of the given set of enum values
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* with least significant digits rightmost.
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* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class, or if any {@code values} {@code null}
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* @since 3.2
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* @param enumClass the class of the enum to query, not null
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* @param enumName the enum name, null returns false
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* @return true if the enum name is valid, otherwise false
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* @since 3.8
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*/
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@SafeVarargs
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public static <E extends Enum<E>> long[] generateBitVectors(final Class<E> enumClass, final E... values) {
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asEnum(enumClass);
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Validate.noNullElements(values);
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final EnumSet<E> condensed = EnumSet.noneOf(enumClass);
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Collections.addAll(condensed, values);
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final long[] result = new long[(enumClass.getEnumConstants().length - 1) / Long.SIZE + 1];
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for (final E value : condensed) {
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result[value.ordinal() / Long.SIZE] |= 1L << (value.ordinal() % Long.SIZE);
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}
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ArrayUtils.reverse(result);
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return result;
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public static <E extends Enum<E>> boolean isValidEnumIgnoreCase(final Class<E> enumClass, final String enumName) {
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return getEnumIgnoreCase(enumClass, enumName) != null;
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}
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/**
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@ -346,34 +371,9 @@ public class EnumUtils {
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}
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/**
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* Validate that {@code enumClass} is compatible with representation in a {@code long}.
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* @param <E> the type of the enumeration
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* @param enumClass to check
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* @return {@code enumClass}
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* @throws NullPointerException if {@code enumClass} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class or has more than 64 values
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* @since 3.0.1
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* This constructor is public to permit tools that require a JavaBean
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* instance to operate.
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*/
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private static <E extends Enum<E>> Class<E> checkBitVectorable(final Class<E> enumClass) {
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final E[] constants = asEnum(enumClass).getEnumConstants();
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Validate.isTrue(constants.length <= Long.SIZE, CANNOT_STORE_S_S_VALUES_IN_S_BITS,
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Integer.valueOf(constants.length), enumClass.getSimpleName(), Integer.valueOf(Long.SIZE));
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return enumClass;
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}
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/**
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* Validate {@code enumClass}.
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* @param <E> the type of the enumeration
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* @param enumClass to check
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* @return {@code enumClass}
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* @throws NullPointerException if {@code enumClass} is {@code null}
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* @throws IllegalArgumentException if {@code enumClass} is not an enum class
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* @since 3.2
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*/
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private static <E extends Enum<E>> Class<E> asEnum(final Class<E> enumClass) {
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Validate.notNull(enumClass, ENUM_CLASS_MUST_BE_DEFINED);
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Validate.isTrue(enumClass.isEnum(), S_DOES_NOT_SEEM_TO_BE_AN_ENUM_TYPE, enumClass);
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return enumClass;
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public EnumUtils() {
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}
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}
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