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. 014 015 package org.apache.tapestry.parse; 016 017 import org.apache.hivemind.Location; 018 019 /** 020 * Provides a {@link TemplateParser}with additional information about dynamic components. 021 * 022 * @author Howard Lewis Ship 023 */ 024 025 public interface ITemplateParserDelegate 026 { 027 /** 028 * Returns true if the component id is valid, false if the component id is not recognized. 029 */ 030 031 public boolean getKnownComponent(String componentId); 032 033 /** 034 * Returns true if the specified component allows a body, false otherwise. The parser uses this 035 * information to determine if it should ignore the body of a tag. 036 * 037 * @throws org.apache.tapestry.ApplicationRuntimeException 038 * if no such component exists 039 */ 040 041 public boolean getAllowBody(String componentId, Location location); 042 043 /** 044 * Used with implicit components to determine if the component allows a body or not. 045 * 046 * @param libraryId 047 * the specified library id, possibly null 048 * @param type 049 * the component type 050 * @throws org.apache.tapestry.ApplicationRuntimeException 051 * if the specification cannot be found 052 * @since 3.0 053 */ 054 055 public boolean getAllowBody(String libraryId, String type, Location location); 056 057 /** 058 * Returns the name of the attribute used to indicate a component. The default is "jwcid", but 059 * this can be overriden in a number of ways. 060 */ 061 062 public String getComponentAttributeName(); 063 }