| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.struts2.views.java.simple; |
| |
| import com.opensymphony.xwork2.util.TextParseUtil; |
| import com.opensymphony.xwork2.util.ValueStack; |
| import org.apache.struts2.components.template.TemplateRenderingContext; |
| import org.apache.struts2.util.ComponentUtils; |
| import org.apache.struts2.views.java.Attributes; |
| import org.apache.struts2.views.java.TagHandler; |
| import org.apache.struts2.views.util.ContextUtil; |
| |
| import java.io.IOException; |
| |
| public abstract class AbstractTagHandler implements TagHandler { |
| |
| protected TagHandler nextTagHandler; |
| protected TemplateRenderingContext context; |
| protected boolean altSyntax; |
| |
| public void characters(String text) throws IOException { |
| characters(text, true); |
| } |
| |
| public void characters(String text, boolean encode) throws IOException { |
| if (nextTagHandler != null) { |
| nextTagHandler.characters(text, encode); |
| } |
| } |
| |
| public void end(String name) throws IOException { |
| if (nextTagHandler != null) { |
| nextTagHandler.end(name); |
| } |
| |
| } |
| |
| public void setNext(TagHandler next) { |
| this.nextTagHandler = next; |
| } |
| |
| public void start(String name, Attributes a) throws IOException { |
| if (nextTagHandler != null) { |
| nextTagHandler.start(name, a); |
| } |
| |
| } |
| |
| public void setup(TemplateRenderingContext context) { |
| this.context = context; |
| this.altSyntax = ContextUtil.isUseAltSyntax(context.getStack().getContext()); |
| processParams(); |
| } |
| |
| protected void processParams() { |
| } |
| |
| protected String findString(String expr) { |
| return (String) findValue(expr, String.class); |
| } |
| |
| protected Object findValue(String expr) { |
| if (expr == null) { |
| return null; |
| } |
| |
| ValueStack stack = context.getStack(); |
| return stack.findValue(ComponentUtils.stripExpressionIfAltSyntax(stack, expr)); |
| } |
| |
| private Object findValue(String expr, Class toType) { |
| ValueStack stack = context.getStack(); |
| |
| if (altSyntax && toType == String.class) { |
| return TextParseUtil.translateVariables('%', expr, stack); |
| } else { |
| return stack.findValue(ComponentUtils.stripExpressionIfAltSyntax(stack, expr), toType); |
| } |
| } |
| } |