001 // Copyright 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.record; 016 017 import org.apache.hivemind.util.Defense; 018 019 /** 020 * Base implementation of {@link org.apache.tapestry.record.ClientPropertyPersistenceScope} wherein 021 * the scopes are recognized via a prefix on the page name to form the query parameter name. 022 * Capiche? 023 * 024 * @author Howard Lewis Ship 025 * @since 4.0 026 */ 027 public abstract class AbstractPrefixedClientPropertyPersistenceScope implements 028 ClientPropertyPersistenceScope 029 { 030 private final String _prefix; 031 032 public AbstractPrefixedClientPropertyPersistenceScope(String prefix) 033 { 034 Defense.notNull(prefix, "prefix"); 035 036 _prefix = prefix; 037 } 038 039 public String constructParameterName(String pageName) 040 { 041 return _prefix + pageName; 042 } 043 044 public boolean isParameterForScope(String parameterName) 045 { 046 return parameterName.startsWith(_prefix); 047 } 048 049 public String extractPageName(String parameterName) 050 { 051 return parameterName.substring(_prefix.length()); 052 } 053 054 }