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Naming Library of the SARL SDK
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/*
 * $Id$
 *
 * SARL is an general-purpose agent programming language.
 * More details on http://www.sarl.io
 *
 * Copyright (C) 2014-2024 SARL.io, the Original Authors and Main Authors
 *
 * 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 io.sarl.api.naming.namespace

import io.sarl.api.naming.name.SarlName
import io.sarl.api.naming.parser.INameParser
import java.net.URI
import org.arakhne.afc.services.IService

/** 
 * This service enables to manage the name spaces into the SRE.
 *
 * Each object within the SRE may be identified by a name, stored into an {@link SarlName}.
 * 
 * @author Stéphane Galland
 * @version api.naming 0.14.0 20241106-161408
 * @mavengroupid io.sarl.sdk
 * @mavenartifactid api.naming
 * @since 0.12
 */
interface NamespaceService extends IService {

	/** 
	 * Replies the name parser that is used by this service.
	 * 
	 * @return The name parser
	 * @since 0.11
	 */
	@Pure
	def getNameParser : INameParser

	/** 
	 * Replies the validator for the access to the fields that is used by this service.
	 * 
	 * @return The field access validator.
	 * @since 0.12
	 */
	@Pure
	def getFieldAccessValidator : IFieldAccessValidator

	/**
	 * Finds and replies the object with the given name and of the given type.
	 *
	 * @param name the name of the object. See the documentation of {@link NamespaceService}
	 *     for details.
	 * @return the root context.  A {@code null} value is replied if the object is not found.
	 */
	@Pure
	def findObject(name : SarlName, type : Class) : T with T

	/** 
	 * Finds and replies the object with the given name and of the given type.
	 * 
	 * @param name the name of the object. See the documentation of {@link NamespaceService}
	 * for details.
	 * @return the object with the given name. A {@code null} value is replied if the object is not found.
	 */
	@Pure
	def findObject(name : SarlName) : Object

	/** 
	 * Finds and replies the object with the given name and of the given type.
	 * 
	 * @param name the name of the object. See the documentation of {@link NamespaceService}
	 * for details.
	 * @return the root context.  A {@code null} value is replied if the object is not found.
	 * @since 0.11
	 */
	@Pure
	def findObject(name : String, type : Class) : T with T {
		var parser = this.nameParser
		var nameURI = parser.decode(name)
		if (nameURI === null) {
			return null
		}
		var sarlName = parser.decode(nameURI)
		if (sarlName === null) {
			return null
		}
		return findObject(sarlName, type)
	}

	/** 
	 * Finds and replies the object with the given name and of the given type.
	 * 
	 * @param name the name of the object. See the documentation of {@link NamespaceService}
	 * for details.
	 * @return the object with the given name. A {@code null} value is replied if the object is not found.
	 * @since 0.11
	 */
	@Pure
	def findObject(name : String) : Object {
		var parser = this.nameParser
		var nameURI = parser.decode(name)
		if (nameURI === null) {
			return null
		}
		var sarlName = parser.decode(nameURI)
		if (sarlName === null) {
			return null
		}
		return findObject(sarlName)
	}

	/** 
	 * Finds and replies the object with the given name and of the given type.
	 * 
	 * @param name the name of the object. See the documentation of {@link NamespaceService}
	 * for details.
	 * @return the root context.  A {@code null} value is replied if the object is not found.
	 * @since 0.12
	 */
	@Pure
	def findObject(name : URI, type : Class) : T with T {
		var parser = this.nameParser
		var sarlName = parser.decode(name)
		if (sarlName === null) {
			return null
		}
		return findObject(sarlName, type)
	}

	/** 
	 * Finds and replies the object with the given name and of the given type.
	 * 
	 * @param name the name of the object. See the documentation of {@link NamespaceService}
	 * for details.
	 * @return the object with the given name. A {@code null} value is replied if the object is not found.
	 * @since 0.12
	 */
	@Pure
	def findObject(name : URI) : Object {
		var parser = this.nameParser
		var sarlName = parser.decode(name)
		if (sarlName === null) {
			return null
		}
		return findObject(sarlName)
	}

}