001// Copyright 2004, 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry.resolver; 016 017import org.apache.tapestry.INamespace; 018import org.apache.tapestry.IRequestCycle; 019import org.apache.tapestry.spec.IComponentSpecification; 020 021/** 022 * Delegate interface used when a page or component specification can not be found by the normal 023 * means. This allows hooks to support specifications from unusual locations, or generated on the 024 * fly. 025 * <p> 026 * The delegate must be coded in a threadsafe manner. 027 * 028 * @author Howard Lewis Ship 029 * @since 3.0 030 */ 031 032public interface ISpecificationResolverDelegate 033{ 034 /** 035 * Invoked by {@link PageSpecificationResolver} to find the indicated page specification. 036 * Returns the specification, or null. The specification, if returned, <em>will be cached</em> 037 * (this represents a change from release 3.0 to release 4.0). 038 * 039 * @param cycle 040 * used to gain access to framework and Servlet API objects 041 * @param namespace 042 * the namespace containing the page 043 * @param simplePageName 044 * the name of the page (without any namespace prefix) 045 */ 046 047 public IComponentSpecification findPageSpecification(IRequestCycle cycle, INamespace namespace, 048 String simplePageName); 049 050 /** 051 * Invoked by {@link PageSpecificationResolver} to find the indicated component specification. 052 * Returns the specification, or null. The specification <em>will be cached</em> (this 053 * represents a change from release 3.0 to release 4.0). 054 * 055 * @param cycle 056 * used to gain access to framework and Servlet API objects 057 * @param namespace 058 * the namespace containing the component 059 * @param type 060 * the component type (without any namespace prefix) 061 */ 062 063 public IComponentSpecification findComponentSpecification(IRequestCycle cycle, 064 INamespace namespace, String type); 065}