com.speedment.runtime.field.EnumField Maven / Gradle / Ivy
/**
*
* Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); You may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.speedment.runtime.field;
import com.speedment.runtime.compute.ToDoubleNullable;
import com.speedment.runtime.compute.ToEnumNullable;
import com.speedment.runtime.config.identifier.ColumnIdentifier;
import com.speedment.runtime.field.internal.EnumFieldImpl;
import com.speedment.runtime.field.method.ReferenceGetter;
import com.speedment.runtime.field.method.ReferenceSetter;
import com.speedment.runtime.field.predicate.FieldIsNotNullPredicate;
import com.speedment.runtime.field.predicate.FieldIsNullPredicate;
import com.speedment.runtime.field.predicate.Inclusion;
import com.speedment.runtime.field.trait.HasStringOperators;
import com.speedment.runtime.typemapper.TypeMapper;
import java.util.EnumSet;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.function.ToDoubleFunction;
/**
* A field representing an {@code Enum} value in the entity.
*
* @author Emil Forslund
* @since 3.0.10
*
* @see ComparableField
*/
public interface EnumField>
extends ComparableField,
HasStringOperators,
ToEnumNullable {
@Override
EnumField tableAlias(String tableAlias);
/**
* Returns the enum class of this field.
*
* @return the enum class
* @since 3.0.13
*/
Class enumClass();
/**
* Returns the set of possible values for this enum. The order will be the
* ordinal order of the enum.
*
* This method creates a copy of the internal storage structure so changes
* to the returned collection are allowed.
*
* @return the constants
*/
EnumSet constants();
/**
* A method that takes a {@code String} and converts it into an enum for
* this field.
*
* The function should return {@code null} if a {@code null} value is
* specified as input and throw an exception if the value is invalid.
*
* @return the string-to-enum mapper
*/
Function stringToEnum();
/**
* A method that takes an enum and converts it into a {@code String}.
*
* The function should return {@code null} if a {@code null} value is
* specified as input and throw an exception if the value is invalid.
*
* @return the enum-to-string mapper
*/
Function enumToString();
/**
* Returns a new predicate that evaluates if entities has a enum value for
* this field with a value that is equal to the specified value. The string
* of the enum is determined using the {@link #enumToString()}-method.
*
* @param value the argument
* @return the predicate
*/
Predicate equal(String value);
/**
* Returns a new predicate that evaluates if entities has a enum value for
* this field with a value that is not equal to the specified value. The
* string of the enum is determined using the
* {@link #enumToString()}-method.
*
* @param value the argument
* @return the predicate
*/
Predicate notEqual(String value);
/**
* Returns a new predicate that evaluates if entities has a enum value for
* this field with a value that is less than the specified value. The
* string of the enum is determined using the
* {@link #enumToString()}-method.
*
* @param value the argument
* @return the predicate
*/
Predicate lessThan(String value);
/**
* Returns a new predicate that evaluates if entities has a enum value for
* this field with a value that is less or equal to the specified value. The
* string of the enum is determined using the
* {@link #enumToString()}-method.
*
* @param value the argument
* @return the predicate
*/
Predicate lessOrEqual(String value);
/**
* Returns a new predicate that evaluates if entities has a enum value for
* this field with a value that is greater than the specified value. The
* string of the enum is determined using the
* {@link #enumToString()}-method.
*
* @param value the argument
* @return the predicate
*/
Predicate greaterThan(String value);
/**
* Returns a new predicate that evaluates if entities has a enum value for
* this field with a value that is greater or equal to the specified value.
* The string of the enum is determined using the
* {@link #enumToString()}-method.
*
* @param value the argument
* @return the predicate
*/
Predicate greaterOrEqual(String value);
/**
* Returns a new predicate that evaluates if entities has a enum value for
* this field with a value that is between the two specified values.
* The string of the enum is determined using the
* {@link #enumToString()}-method.
*
* @param start the start (inclusive)
* @param end the end (exclusive)
* @return the predicate
*/
default Predicate between(String start, String end) {
return between(start, end, Inclusion.START_INCLUSIVE_END_EXCLUSIVE);
}
/**
* Returns a new predicate that evaluates if entities has a enum value for
* this field with a value that is between the two specified values.
* The string of the enum is determined using the
* {@link #enumToString()}-method.
*
* @param start the start
* @param end the end
* @param inclusion if start and end are inclusive or exclusive
* @return the predicate
*/
Predicate between(String start, String end, Inclusion inclusion);
/**
* Returns a new predicate that evaluates if entities has a enum value for
* this field with a value that is not between the two specified values.
* The string of the enum is determined using the
* {@link #enumToString()}-method.
*
* @param start the start (inclusive)
* @param end the end (exclusive)
* @return the predicate
*/
default Predicate notBetween(String start, String end) {
return notBetween(start, end, Inclusion.START_INCLUSIVE_END_EXCLUSIVE);
}
/**
* Returns a new predicate that evaluates if entities has a enum value for
* this field with a value that is not between the two specified values.
* The string of the enum is determined using the
* {@link #enumToString()}-method.
*
* @param start the start
* @param end the end
* @param inclusion if start and end are inclusive or exclusive
* @return the predicate
*/
Predicate notBetween(String start, String end, Inclusion inclusion);
@Override
FieldIsNullPredicate isNull();
@Override
default FieldIsNotNullPredicate isNotNull() {
return isNull().negate();
}
@Override
default E apply(ENTITY entity) {
return get(entity);
}
@Override
default ToDoubleNullable mapToDoubleIfPresent(ToDoubleFunction mapper) {
return ComparableField.super.mapToDoubleIfPresent(mapper);
}
/**
* Create a new instance of this interface using the default implementation.
*
* @param the entity type
* @param the database type
* @param the java enum type
* @param identifier the column that this field represents
* @param getter method reference to the getter in the entity
* @param setter method reference to the setter in the entity
* @param typeMapper the type mapper that is applied
* @param enumToString method to convert enum to a string
* @param stringToEnum method to convert a string to enum
* @param enumClass the enum class
*
* @return the created field
*/
static > EnumField create(
ColumnIdentifier identifier,
ReferenceGetter getter,
ReferenceSetter setter,
TypeMapper typeMapper,
Function enumToString,
Function stringToEnum,
Class enumClass) {
return new EnumFieldImpl<>(
identifier, getter, setter, typeMapper,
enumToString, stringToEnum, enumClass
);
}
}