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/*
 * Fixture Monkey
 *
 * Copyright (c) 2021-present NAVER Corp.
 *
 * 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.navercorp.fixturemonkey;

import java.util.List;
import java.util.function.BiConsumer;
import java.util.function.BiFunction;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.function.Supplier;
import java.util.stream.Stream;

import javax.annotation.Nullable;

import org.apiguardian.api.API;
import org.apiguardian.api.API.Status;

import net.jqwik.api.Arbitrary;
import net.jqwik.api.Combinators.F3;
import net.jqwik.api.Combinators.F4;

import com.navercorp.fixturemonkey.api.arbitrary.CombinableArbitrary;
import com.navercorp.fixturemonkey.api.experimental.TypedPropertySelector;
import com.navercorp.fixturemonkey.api.instantiator.Instantiator;
import com.navercorp.fixturemonkey.api.property.PropertySelector;
import com.navercorp.fixturemonkey.api.type.TypeReference;
import com.navercorp.fixturemonkey.api.validator.ArbitraryValidator;
import com.navercorp.fixturemonkey.customizer.InnerSpec;

/**
 * A builder instance for generating an instance of given type.
 * A complex class could be built by given methods.
 *
 * @param  type to generate
 */
@API(since = "0.4.0", status = Status.MAINTAINED)
public interface ArbitraryBuilder {
	/**
	 * Set one or more properties referenced by expression to {@code value}.
	 *
	 * @param expression expression similar to Java syntax, including {@code .}, {@code []}
	 *                   common expression including {@code *} referencing properties.
	 * @param value      various type of value including {@link Supplier}, {@link Arbitrary},
	 *                   {@link ArbitraryBuilder}, {@code NOT_NULL}, {@code null}.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code expression} are set as
	 * {@code value}.
	 */
	ArbitraryBuilder set(String expression, @Nullable Object value);

	/**
	 * Set the number of {@code limit} properties referenced by expression to {@code value}.
	 *
	 * @param expression expression similar to Java syntax, including {@code .}, {@code []}
	 *                   common expression including {@code *} referencing properties.
	 * @param value      various type of value including {@link Supplier}, {@link Arbitrary},
	 *                   {@link ArbitraryBuilder}, {@code NOT_NULL}, {@code null}.
	 * @param limit      the count of affected properties referenced by {@code expression}
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code expression} are
	 * set as {@code value}.
	 * @see ArbitraryBuilder#set(String, Object)
	 */
	ArbitraryBuilder set(String expression, @Nullable Object value, int limit);

	/**
	 * Set one or more properties referenced by expression to {@code value}.
	 *
	 * @param propertySelector it selects one or more properties.
	 * @param value            various type of value including {@link Supplier}, {@link Arbitrary},
	 *                         {@link ArbitraryBuilder}, {@code NOT_NULL}, {@code null}.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code propertySelector}
	 * are set as {@code value}.
	 * @see ArbitraryBuilder#set(String, Object)
	 */
	ArbitraryBuilder set(PropertySelector propertySelector, @Nullable Object value);

	/**
	 * Set one or more properties referenced by expression to {@code value}.
	 *
	 * @param propertySelector it selects one or more properties.
	 * @param value            various type of value including {@link Supplier}, {@link Arbitrary},
	 *                         {@link ArbitraryBuilder}, {@code NOT_NULL}, {@code null}.
	 * @param limit            the count of affected properties referenced by {@code expression}
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code propertySelector} are set as
	 * {@code value}.
	 * @see ArbitraryBuilder#set(String, Object, int)
	 */
	ArbitraryBuilder set(PropertySelector propertySelector, @Nullable Object value, int limit);

	/**
	 * Set the {@link ArbitraryBuilder} sampling given {@code value}.
	 * It is same as {@code set("$", value)}
	 *
	 * @param value various type of value including {@link Supplier}, {@link Arbitrary},
	 *              {@link ArbitraryBuilder}, {@code NOT_NULL}, {@code null}.
	 * @return ArbitraryBuilder is set as {@code value}.
	 * @see ArbitraryBuilder#set(String, Object)
	 */
	ArbitraryBuilder set(@Nullable Object value);

	/**
	 * Apply one or more manipulations defined in {@link InnerSpec}.
	 *
	 * @param innerSpec a type-independent specification of manipulators
	 * @return an {@link ArbitraryBuilder} applied the manipulators in {@link InnerSpec}
	 */
	ArbitraryBuilder setInner(InnerSpec innerSpec);

	/**
	 * Set one or more properties referenced by expression to a result of {@link Supplier}.
	 * The {@link Supplier} gets the result when manipulation is executed.
	 * It might be used when to set the latest value or set unique id generated sequentially.
	 *
	 * @param expression expression similar to Java syntax, including {@code .}, {@code []}
	 *                   common expression including {@code *} referencing properties.
	 * @param supplier   a supplier of result. It might be a value or method.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code propertySelector} are set as
	 * {@code value}.
	 * @see ArbitraryBuilder#set(String, Object, int)
	 */
	ArbitraryBuilder setLazy(String expression, Supplier supplier);

	/**
	 * Set the number of {@code limit} properties referenced by expression to a result of {@link Supplier}.
	 * The {@link Supplier} gets the result when manipulation is executed.
	 * It might be used when to set the latest value or set unique id generated sequentially.
	 *
	 * @param expression expression similar to Java syntax, including {@code .}, {@code []}
	 *                   common expression including {@code *} referencing properties.
	 * @param supplier   a supplier of result. It might be a value or method.
	 * @param limit      the count of affected properties referenced by {@code expression}
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code expression} are set as
	 * {@code value}.
	 * @see ArbitraryBuilder#set(String, Object, int)
	 */
	ArbitraryBuilder setLazy(String expression, Supplier supplier, int limit);

	/**
	 * Set one or more properties referenced by expression to a result of {@link Supplier}.
	 * The {@link Supplier} gets the result when manipulation is executed.
	 * It might be used when to set the latest value or set unique id generated sequentially.
	 *
	 * @param propertySelector it selects one or more properties.
	 * @param supplier         a supplier of result. It might be a value or method.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code propertySelector} are set as
	 * {@code value}.
	 * @see ArbitraryBuilder#set(String, Object)
	 */
	ArbitraryBuilder setLazy(PropertySelector propertySelector, Supplier supplier);

	/**
	 * Set the number of {@code limit} properties referenced by expression to a result of {@link Supplier}.
	 * The {@link Supplier} gets the result when manipulation is executed.
	 * It might be used when to set the latest value or set unique id generated sequentially.
	 *
	 * @param propertySelector it selects one or more properties.
	 * @param supplier         a supplier of result. It might be a value or method.
	 * @param limit            the count of affected properties referenced by {@code expression}
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code propertySelector} are set as
	 * {@code value}.
	 * @see ArbitraryBuilder#set(String, Object, int)
	 */
	ArbitraryBuilder setLazy(PropertySelector propertySelector, Supplier supplier, int limit);

	/**
	 * Set one or more properties referenced by expression to null.
	 * If a manipulation you've already declared contains an {@code expression}, this manipulation would be omitted.
	 * It is same as {@code set(expression, null)}.
	 *
	 * @param expression expression similar to Java syntax, including {@code .}, {@code []}
	 *                   common expression including {@code *} referencing properties.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code expression} are set as null.
	 */
	ArbitraryBuilder setNull(String expression);

	/**
	 * Set one or more properties referenced by expression to null.
	 * If a manipulation you've already declared contains an {@code expression}, this manipulation would be omitted.
	 * It is same as {@code set(expression, null)}.
	 *
	 * @param propertySelector it selects one or more properties.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code propertySelector}
	 * are set as null.
	 */
	ArbitraryBuilder setNull(PropertySelector propertySelector);

	/**
	 * Set one or more properties referenced by expression to not null.
	 * If the properties are null, they are generated randomly for their type.
	 * It is same as {@code set(expression, NOT_NULL)}.
	 *
	 * @param expression expression similar to Java syntax, including {@code .}, {@code []}
	 *                   common expression including {@code *} referencing properties.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code expression} are set as not null.
	 */
	ArbitraryBuilder setNotNull(String expression);

	/**
	 * Set one or more properties referenced by expression to not null.
	 * If the properties are null, they are generated randomly for their type.
	 * It is same as {@code set(expression, NOT_NULL)}.
	 *
	 * @param propertySelector it selects one or more properties.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code propertySelector} are set as
	 * not null.
	 */
	ArbitraryBuilder setNotNull(PropertySelector propertySelector);

	/**
	 * Set one or more properties referenced by expression post-condition.
	 *
	 * @param         the type of property.
	 * @param expression expression similar to Java syntax, including {@code .}, {@code []}
	 *                   common expression including {@code *} referencing properties.
	 * @param type       the type of property.
	 * @param predicate  determines the post-condition of properties.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code expression}
	 * satisfy the post-condition.
	 */
	 ArbitraryBuilder setPostCondition(String expression, Class type, Predicate predicate);

	/**
	 * Set one or more properties referenced by expression post-condition.
	 *
	 * @param               the type of property.
	 * @param propertySelector it selects one or more properties.
	 * @param type             the type of property.
	 * @param predicate        determines the post-condition of properties.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code propertySelector}
	 * satisfy the post-condition.
	 */
	 ArbitraryBuilder setPostCondition(
		PropertySelector propertySelector,
		Class type,
		Predicate predicate
	);

	/**
	 * Set the number of {@code limit} properties referenced by expression post-condition.
	 *
	 * @param         the type of property.
	 * @param expression expression similar to Java syntax, including {@code .}, {@code []}
	 *                   common expression including {@code *} referencing properties.
	 * @param type       the type of property.
	 * @param predicate  determines the post-condition of properties.
	 * @param limit      the count of affected properties referenced by {@code expression}
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code expression} satisfy
	 * the post-condition.
	 */
	 ArbitraryBuilder setPostCondition(
		String expression,
		Class type,
		Predicate predicate,
		int limit
	);

	/**
	 * Set the number of {@code limit} properties referenced by expression post-condition.
	 *
	 * @param               the type of property.
	 * @param propertySelector it selects one or more properties.
	 * @param type             the type of property.
	 * @param predicate        determines the post-condition of properties.
	 * @param limit            the count of affected properties referenced by {@code propertySelector}
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code propertySelector}
	 * satisfy the post-condition.
	 */
	 ArbitraryBuilder setPostCondition(
		PropertySelector propertySelector,
		Class type,
		Predicate predicate,
		int limit
	);

	/**
	 * Set the {@link ArbitraryBuilder} post-condition.
	 * It is same as {@code setPostCondition("$", Class, Predicate)}
	 *
	 * @param predicate determines the post-condition of the {@link ArbitraryBuilder}.
	 * @return an {@link ArbitraryBuilder} whose properties referenced by an {@code propertySelector}
	 * satisfy the post-condition.
	 * @see ArbitraryBuilder#setPostCondition(String, Class, Predicate)
	 */
	ArbitraryBuilder setPostCondition(Predicate predicate);

	/**
	 * Set the {@code size} of one or more container properties referenced by expression.
	 *
	 * @param expression expression similar to Java syntax, including {@code .}, {@code []}
	 *                   common expression including {@code *} referencing properties.
	 * @param size       of the container to generate
	 * @return {@link ArbitraryBuilder} whose size of container properties referenced by an {@code expression} is
	 * {@code size}
	 */
	ArbitraryBuilder size(String expression, int size);

	/**
	 * Set the {@code size} of one or more container properties referenced by expression.
	 *
	 * @param propertySelector it selects one or more properties.
	 * @param size             of the container to generate
	 * @return {@link ArbitraryBuilder} whose size of container properties referenced by an {@code expression} is
	 * {@code size}
	 */
	ArbitraryBuilder size(PropertySelector propertySelector, int size);

	/**
	 * Set the size of one or more container properties referenced by expression.
	 * {@code minSize} should be less than or equal to {@code maxSize}.
	 *
	 * @param expression expression similar to Java syntax, including {@code .}, {@code []}
	 *                   common expression including {@code *} referencing properties.
	 * @param minSize    of the container to generate
	 * @param maxSize    of the container to generate
	 * @return an {@link ArbitraryBuilder} whose size of container properties referenced by an {@code expression} is
	 * between {@code minSize} and {@code maxSize}.
	 */
	ArbitraryBuilder size(String expression, int minSize, int maxSize);

	/**
	 * Set the size of one or more container properties referenced by expression.
	 * {@code minSize} should be less than or equal to {@code maxSize}.
	 *
	 * @param propertySelector it selects one or more properties.
	 * @param minSize          of the container to generate
	 * @param maxSize          of the container to generate
	 * @return an {@link ArbitraryBuilder} whose size of container properties referenced by an {@code expression} is
	 * between {@code minSize} and {@code maxSize}.
	 */
	ArbitraryBuilder size(PropertySelector propertySelector, int minSize, int maxSize);

	/**
	 * Set the size of one or more container properties referenced by expression.
	 * The size of container properties would be between {@code minSize} and
	 * {@code minSize} + {@link Constants#DEFAULT_ELEMENT_MAX_SIZE}
	 * 

* It would conflict with {@link ArbitraryBuilder#maxSize(String, int)}. * The last executed manipulation would set the size of properties. *

* It is same as {@code size(minSize, minSize + DEFAULT_ELEMENT_MAX_SIZE)}. * * @param expression expression similar to Java syntax, including {@code .}, {@code []} * common expression including {@code *} referencing properties. * @param minSize of the container to generate * @return an {@link ArbitraryBuilder} whose size of container properties referenced by an {@code expression} * is between {@code minSize} and {@code minSize} + {@link Constants#DEFAULT_ELEMENT_MAX_SIZE}. */ ArbitraryBuilder minSize(String expression, int minSize); /** * Set the size of one or more container properties referenced by expression. * The size of container properties would be between {@code minSize} and * {@code minSize} + {@link Constants#DEFAULT_ELEMENT_MAX_SIZE} *

* It would conflict with {@link ArbitraryBuilder#maxSize(String, int)}. * The last executed manipulation would set the size of properties. *

* It is same as {@code size(minSize, minSize + DEFAULT_ELEMENT_MAX_SIZE)}. * * @param propertySelector it selects one or more properties. * @param minSize of the container to generate * @return an {@link ArbitraryBuilder} whose size of container properties referenced by * an {@code propertySelector} is between {@code minSize} * and {@code minSize} + {@link Constants#DEFAULT_ELEMENT_MAX_SIZE}. */ ArbitraryBuilder minSize(PropertySelector propertySelector, int minSize); /** * Set the size of one or more container properties referenced by expression. * The size of container properties would be between * max(0, {@code maxSize} - {@link Constants#DEFAULT_ELEMENT_MAX_SIZE}) * and {@code maxSize} *

* It would conflict with {@link ArbitraryBuilder#minSize(String, int)}. * The last executed manipulation would set the size of properties. *

* It is same as {@code size(expression, Math.max(0, maxSize - DEFAULT_ELEMENT_MAX_SIZE), maxSize)}. * * @param expression expression similar to Java syntax, including {@code .}, {@code []} * common expression including {@code *} referencing properties. * @param maxSize of the container to generate * @return an {@link ArbitraryBuilder} whose size of container properties referenced by an {@code expression} is * max(0, {@code maxSize} - {@link Constants#DEFAULT_ELEMENT_MAX_SIZE}) * and {@code maxSize} */ ArbitraryBuilder maxSize(String expression, int maxSize); /** * Set the size of one or more container properties referenced by expression. * The size of container properties would be between * max(0, {@code maxSize} - {@link Constants#DEFAULT_ELEMENT_MAX_SIZE}) and {@code maxSize} *

* It would conflict with {@link ArbitraryBuilder#minSize(String, int)}. * The last executed manipulation would set the size of properties. *

* It is same as {@code size(expression, Math.max(0, maxSize - DEFAULT_ELEMENT_MAX_SIZE), maxSize)} * * @param propertySelector it selects one or more properties. * @param maxSize of the container to generate * @return {@link ArbitraryBuilder} whose size of container properties referenced by * an {@code propertySelector} is max(0, {@code maxSize} - {@link Constants#DEFAULT_ELEMENT_MAX_SIZE}) * and {@code maxSize} */ ArbitraryBuilder maxSize(PropertySelector propertySelector, int maxSize); ArbitraryBuilder thenApply(BiConsumer> biConsumer); ArbitraryBuilder acceptIf(Predicate predicate, Consumer> consumer); /** * Makes {@link ArbitraryBuilder} always sample an equivalent instance. * All manipulations after {@link #fixed()} would work. * * @return a new {@link ArbitraryBuilder} always samples an equivalent instance */ ArbitraryBuilder fixed(); /** * Transforms an instance by applying function to it. * * @param mapper the transforming {@link Function} * @param type to transform * @return a new {@link ArbitraryBuilder} */ ArbitraryBuilder map(Function mapper); /** * Combine the result from this {@link ArbitraryBuilder} and another into a new {@link ArbitraryBuilder} * * @param other the {@link ArbitraryBuilder} to combine with * @param combinator a {@link BiFunction} combinator function * @param the element type of other {@link ArbitraryBuilder} * @param the element type of the combination * @return a new combined {@link ArbitraryBuilder} */ ArbitraryBuilder zipWith(ArbitraryBuilder other, BiFunction combinator); /** * Combine the result from this {@link ArbitraryBuilder} and other and another into a new {@link ArbitraryBuilder} * * @param other the {@link ArbitraryBuilder} to combine with * @param combinator a {@link BiFunction} combinator function * @param the element type of other {@link ArbitraryBuilder} * @param the element type of another {@link ArbitraryBuilder} * @param the element type of the combination * @return a new combined {@link ArbitraryBuilder} */ ArbitraryBuilder zipWith( ArbitraryBuilder other, ArbitraryBuilder another, F3 combinator ); /** * Combine the result from this {@link ArbitraryBuilder} and other and another and the other into * a new {@link ArbitraryBuilder} * * @param other the {@link ArbitraryBuilder} to combine with * @param combinator a {@link BiFunction} combinator function * @param the element type of other {@link ArbitraryBuilder} * @param the element type of another {@link ArbitraryBuilder} * @param the element type of the other {@link ArbitraryBuilder} * @param the element type of the combination * @return a new combined {@link ArbitraryBuilder} */ ArbitraryBuilder zipWith( ArbitraryBuilder other, ArbitraryBuilder another, ArbitraryBuilder theOther, F4 combinator ); /** * Combine the result from this {@link ArbitraryBuilder} and others into * a new {@link ArbitraryBuilder} * * @param others the list of {@link ArbitraryBuilder} to combine with * @param combinator a {@link BiFunction} combinator function * @param the element type of the combination * @return a new combined {@link ArbitraryBuilder} */ ArbitraryBuilder zipWith( List> others, Function, R> combinator ); /** * Build {@link ArbitraryBuilder} into {@link Arbitrary} for using various support methods * provided in {@link Arbitrary} * * @return an {@link Arbitrary} built by {@link ArbitraryBuilder} */ Arbitrary build(); /** * Generate a single sample value using this {@link ArbitraryBuilder}. * It might generate differently per sample unless executing {@link #fixed()}. * * @return a generated instance */ T sample(); /** * Generate sample value list using this {@link ArbitraryBuilder}. * All elements might generate differently per sample unless executing {@link #fixed()}. * * @return a list of generated instances */ List sampleList(int size); /** * Generate sample value stream using this {@link ArbitraryBuilder}. * All elements might generate differently per sample unless executing {@link #fixed()}. * * @return a stream of generated instances */ Stream sampleStream(); /** * Copy an {@link ArbitraryBuilder} instance. All manipulations would be copied. * * @return a copied {@link ArbitraryBuilder} */ ArbitraryBuilder copy(); /** * Determine if only samples a valid instance or not. * Default {@code validOnly} is true. * * @param validOnly determines generating only valid instance * @return If true, returned {@link ArbitraryBuilder} would sample a valid instance validated by * the {@link ArbitraryValidator}. * If false, returned {@link ArbitraryBuilder} would sample an instance regardless of * the {@link ArbitraryValidator}. */ ArbitraryBuilder validOnly(boolean validOnly); ArbitraryBuilder instantiate(Instantiator instantiator); ArbitraryBuilder instantiate(Class type, Instantiator instantiator); ArbitraryBuilder instantiate(TypeReference type, Instantiator instantiator); /** * Customizes the arbitrary value generated from selected properties. * It can be called several times and nested. It has an order dependency. *

* Without any set APIs, it customizes the arbitrary value. * With set APIs, it customizes the last value in set APIs. * * @param propertySelector the property selector with type * @param combinableArbitraryCustomizer * @param the type of the properties selected by {@code propertySelector}. * @return a customized {@link ArbitraryBuilder} */ @API(since = "1.0.9", status = Status.MAINTAINED) ArbitraryBuilder customizeProperty( TypedPropertySelector propertySelector, Function, CombinableArbitrary> combinableArbitraryCustomizer ); }