| // Copyright 2006, 2007, 2008 The Apache Software Foundation |
| // |
| // 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 org.apache.tapestry.services; |
| |
| import org.apache.tapestry.ioc.services.ClassNameLocator; |
| |
| /** |
| * Resolves page names and component types to fully qualified class names. Pages and components may be provided by the |
| * application or inside a <em>mapped package</em>. Page names often appear inside URLs, and component types often |
| * appear in component template (when specifying the type of an embedded component). |
| * <p/> |
| * The service is configured using a collection of {@link LibraryMapping}s. Each mapping maps a prefix, such as "core" |
| * to a root package name, such as "org.apache.tapestry.corelib". The root package is expected to have sub-packages: |
| * "pages", "components", "mixins" and "base" ("base" is for base classes). |
| * <p/> |
| * The resolver performs a search of the classpath (via {@link ClassNameLocator}), to build up a set of case-insensitive |
| * maps from logical page name, component type, or mixin type to fully qualified class name. |
| * <p/> |
| * Certain ambiguities occur if mapped packages overlap, either in terms of the the prefixes or the package names. Keep |
| * things clearly seperate to avoid lookup problems. |
| */ |
| public interface ComponentClassResolver |
| { |
| /** |
| * Converts a logical page name (such as might be encoded into a URL) into a fully qualified class name. The case of |
| * the page name is irrelevant. |
| * |
| * @param logicalPageName logical page name |
| * @return fully qualified class name for the page |
| * @throws IllegalArgumentException if the name does not match a known page class |
| */ |
| String resolvePageNameToClassName(String logicalPageName); |
| |
| /** |
| * For a particular path, determines if the path is a logical page name. The check is case insensitive. |
| * |
| * @param pageName potential logical page name |
| * @return true if the page name is valid |
| */ |
| boolean isPageName(String pageName); |
| |
| /** |
| * Converts a fully qualified page class name into a logical class name (often, for inclusion as part of the URI). |
| * This value may later be passed to {@link #resolvePageNameToClassName(String)}. |
| * |
| * @param pageClassName fully qualified name of a page class |
| * @return equivalent logical page name |
| * @throws IllegalArgumentException if the name can not be resolved |
| */ |
| String resolvePageClassNameToPageName(String pageClassName); |
| |
| /** |
| * Returns the canonical form of a logical page name. The canonical form uses character case matching the underlying |
| * class name. |
| * |
| * @throws IllegalArgumentException if the page name does not match a logical page name |
| */ |
| String canonicalizePageName(String pageName); |
| |
| /** |
| * Converts a component type (a logical component name such as might be used inside a template or annotation) into a |
| * fully qualified class name. Case is ignored in resolving the name. |
| * |
| * @param componentType a logical component type |
| * @return fully qualified class name |
| * @throws IllegalArgumentException if the component type can not be resolved |
| */ |
| String resolveComponentTypeToClassName(String componentType); |
| |
| /** |
| * Converts a logical mixin type (as with component types) into a fully qualified class name. Case is ignored when |
| * resolving the name. |
| * |
| * @param mixinType a logical mixin type |
| * @return fully qualified class name |
| * @throws IllegalArgumentException if the mixin type can not be resolved |
| */ |
| String resolveMixinTypeToClassName(String mixinType); |
| } |