| /* |
| * $Id$ |
| * |
| * Copyright 2006 The Apache Software Foundation. |
| * |
| * Licensed 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.components; |
| |
| import java.io.Writer; |
| |
| import com.opensymphony.xwork2.util.OgnlValueStack; |
| |
| /** |
| * <!-- START SNIPPET: javadoc --> |
| * |
| * <p>Perform basic condition flow. 'If' tag could be used by itself or with 'Else If' Tag and/or single/multiple 'Else' |
| * Tag.</p> |
| * |
| * <!-- END SNIPPET: javadoc --> |
| * |
| * |
| * <!-- START SNIPPET: params --> |
| * |
| * <ul> |
| * |
| * <li>test* (Boolean) - Logic to determined if body of tag is to be displayed</li> |
| * |
| * </ul> |
| * |
| * <!-- END SNIPPET: params --> |
| * |
| * |
| * <pre> |
| * <!-- START SNIPPET: example --> |
| * <s:if test="%{false}"> |
| * <div>Will Not Be Executed</div> |
| * </s:if> |
| * <s:elseif test="%{true}"> |
| * <div>Will Be Executed</div> |
| * </s:elseif> |
| * <s:else> |
| * <div>Will Not Be Executed</div> |
| * </s:else> |
| * <!-- END SNIPPET: example --> |
| * </pre> |
| * |
| * @s.tag name="elseif" tld-body-content="JSP" description="Elseif tag" tld-tag-class="org.apache.struts2.views.jsp.ElseIfTag" |
| */ |
| public class ElseIf extends Component { |
| public ElseIf(OgnlValueStack stack) { |
| super(stack); |
| } |
| |
| protected Boolean answer; |
| protected String test; |
| |
| public boolean start(Writer writer) { |
| Boolean ifResult = (Boolean) stack.getContext().get(If.ANSWER); |
| |
| if ((ifResult == null) || (ifResult.booleanValue())) { |
| return false; |
| } |
| |
| //make the comparision |
| answer = (Boolean) findValue(test, Boolean.class); |
| |
| if (answer == null) { |
| answer = Boolean.FALSE; |
| } |
| if (answer.booleanValue()) { |
| stack.getContext().put(If.ANSWER, answer); |
| } |
| return answer != null && answer.booleanValue(); |
| } |
| |
| public boolean end(Writer writer, String body) { |
| if (answer == null) { |
| answer = Boolean.FALSE; |
| } |
| if (answer.booleanValue()) { |
| stack.getContext().put(If.ANSWER, answer); |
| } |
| return super.end(writer, ""); |
| } |
| |
| /** |
| * Expression to determine if body of tag is to be displayed |
| * @s.tagattribute required="true" type="Boolean" |
| */ |
| public void setTest(String test) { |
| this.test = test; |
| } |
| } |