import java.util.Arrays;
import java.util.List;
import java.util.Map;
-import java.util.Map.Entry;
import java.util.Objects;
import java.util.regex.Pattern;
import org.eclipse.jdt.annotation.NonNull;
checkArgument(expression, "expected one of: %s \n%but was: %s", options, value);
}
+ /**
+ * A shortcut for {@code Preconditions.checkNotNull(value, "Key component \"%s\" must not be null", name)}.
+ *
+ * @param value Value itself
+ * @param name Name of the value
+ * @return Non-null value
+ * @throws NullPointerException if value is null
+ */
+ public static <T> @NonNull T requireKeyProp(final @Nullable T value, final @NonNull String name) {
+ if (value == null) {
+ throw new NullPointerException("Key component \"" + name + "\" may not be null");
+ }
+ return value;
+ }
+
/**
* A shortcut for {@code Objects.requireNonNull(value, "Supplied value may not be null")}.
*
* @param value Value itself
* @throws NullPointerException if value is null
*/
- public static void requireValue(@Nullable final Object value) {
+ public static void requireValue(final @Nullable Object value) {
requireNonNull(value, "Supplied value may not be null");
}
}
/**
- * Utility method for comparing two augmentable objects' augmentations.
+ * Utility method for checking whether a target object is compatible.
*
- * @param <T> Augmentable type
- * @param thisObj The object representing 'this'
- * @param other The object representing 'obj'
- * @return True if both object's augmentations are equal
- * @throws NullPointerException if any argument is null
+ * @param requiredClass Required class
+ * @param fieldName name of the field being filled
+ * @param obj Object to check, may be null
+ * @return Object cast to required class, if its class matches requirement, or null
+ * @throws IllegalArgumentException if {@code obj} is not an instance of {@code requiredClass}
+ * @throws NullPointerException if {@code requiredClass} or {@code fieldName} is null
*/
- public static <T extends Augmentable<T>> boolean equalsAugmentations(final @NonNull AugmentationHolder<T> thisObj,
- final @NonNull Augmentable<T> other) {
- if (other instanceof AugmentationHolder) {
- // Simple case: other object is also an AugmentationHolder
- return thisObj.augmentations().equals(((AugmentationHolder<?>) other).augmentations());
- }
-
- // Hard case: compare our augments with presence there...
- for (Entry<Class<? extends Augmentation<T>>, Augmentation<T>> e : thisObj.augmentations().entrySet()) {
- if (!e.getValue().equals(other.augmentation(e.getKey()))) {
- return false;
- }
+ public static <T> @Nullable T checkFieldCast(final @NonNull Class<T> requiredClass, final @NonNull String fieldName,
+ final @Nullable Object obj) {
+ try {
+ return requiredClass.cast(obj);
+ } catch (ClassCastException e) {
+ throw new IllegalArgumentException("Invalid input value for property \"" + fieldName + "\"", e);
}
- // .. and give the other one the chance to do the same
- return other.equals(thisObj);
}
/**
- * Utility for extracting augmentations from an implementation of {@link AugmentationHolder} interface.
+ * Utility method for checking whether the items of target list is compatible.
*
- * @param obj Implementation object
- * @return hash code of augmentations
- * @throws NullPointerException if obj is null
+ * @param requiredClass Required item class
+ * @param fieldName name of the field being filled
+ * @param list List, which items should be checked
+ * @throws IllegalArgumentException if a list item is not instance of {@code requiredItemClass}
+ * @throws NullPointerException if {@code requiredClass} or {@code fieldName} is null
*/
- public static int hashAugmentations(final @NonNull AugmentationHolder<?> obj) {
- return obj.augmentations().hashCode();
+ @SuppressWarnings("unchecked")
+ public static <T> @Nullable List<T> checkListFieldCast(final @NonNull Class<?> requiredClass,
+ final @NonNull String fieldName, final @Nullable List<?> list) {
+ if (list != null) {
+ try {
+ list.forEach(item -> requiredClass.cast(requireNonNull(item)));
+ } catch (ClassCastException | NullPointerException e) {
+ throw new IllegalArgumentException("Invalid input list item for property \"" + requireNonNull(fieldName)
+ + "\"", e);
+ }
+ }
+ return (List<T>) list;
}
/**