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.components; 016 017 import java.text.Format; 018 019 import org.apache.hivemind.ApplicationRuntimeException; 020 import org.apache.tapestry.AbstractComponent; 021 import org.apache.tapestry.IMarkupWriter; 022 import org.apache.tapestry.IRequestCycle; 023 024 /** 025 * Used to insert some text (from a parameter) into the HTML. [ <a 026 * href="../../../../../ComponentReference/Insert.html">Component Reference </a>] 027 * 028 * @author Howard Lewis Ship 029 */ 030 031 public abstract class Insert extends AbstractComponent 032 { 033 /** 034 * Prints its value parameter, possibly formatted by its format parameter. 035 */ 036 037 protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) 038 { 039 if (cycle.isRewinding()) 040 return; 041 042 Object value = getValue(); 043 044 if (value == null) 045 return; 046 047 String insert = null; 048 049 Format format = getFormat(); 050 051 if (format == null) 052 { 053 insert = value.toString(); 054 } 055 else 056 { 057 try 058 { 059 insert = format.format(value); 060 } 061 catch (Exception ex) 062 { 063 throw new ApplicationRuntimeException(ComponentMessages.unableToFormat( 064 this, 065 value, 066 ex), this, getBinding("format").getLocation(), ex); 067 } 068 } 069 070 String styleClass = getStyleClass(); 071 072 if (styleClass != null) 073 { 074 writer.begin("span"); 075 writer.attribute("class", styleClass); 076 077 renderInformalParameters(writer, cycle); 078 } 079 080 writer.print(insert, getRaw()); 081 082 if (styleClass != null) 083 writer.end(); // <span> 084 } 085 086 public abstract Object getValue(); 087 088 public abstract Format getFormat(); 089 090 public abstract String getStyleClass(); 091 092 public abstract boolean getRaw(); 093 094 }