001 package org.apache.myfaces.tobago.model; 002 003 /* 004 * Licensed to the Apache Software Foundation (ASF) under one or more 005 * contributor license agreements. See the NOTICE file distributed with 006 * this work for additional information regarding copyright ownership. 007 * The ASF licenses this file to You under the Apache License, Version 2.0 008 * (the "License"); you may not use this file except in compliance with 009 * the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, software 014 * distributed under the License is distributed on an "AS IS" BASIS, 015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 016 * See the License for the specific language governing permissions and 017 * limitations under the License. 018 */ 019 020 import org.slf4j.Logger; 021 import org.slf4j.LoggerFactory; 022 023 import javax.faces.event.ActionEvent; 024 import java.util.ArrayList; 025 import java.util.List; 026 027 public class Wizard { 028 029 private static final Logger LOG = LoggerFactory.getLogger(Wizard.class); 030 031 private int index; 032 033 private List<WizardStep> course; 034 035 public Wizard() { 036 reset(); 037 } 038 039 public void next(ActionEvent event) { 040 LOG.debug("next: " + event); 041 042 index++; 043 } 044 045 public void gotoStep(ActionEvent event) { 046 Object step = (event.getComponent().getAttributes().get("step")); 047 if (step instanceof Integer) { 048 index = (Integer) step; 049 } else { // todo: The JSP Tag uses String in the moment 050 index = Integer.parseInt((String) step); 051 } 052 053 LOG.debug("gotoStep: " + index); 054 } 055 056 public String previous() { 057 String outcome = getPreviousStep().getOutcome(); 058 if (index > 0) { 059 index--; 060 } else { 061 LOG.error("Previous not available!"); 062 } 063 064 LOG.debug("gotoStep: " + index); 065 return outcome; 066 } 067 068 public final boolean isPreviousAvailable() { 069 return getIndex() > 0; 070 } 071 072 public final void finish(ActionEvent event) { 073 if (LOG.isDebugEnabled()) { 074 LOG.debug("finish"); 075 } 076 077 reset(); 078 } 079 080 public final void cancel(ActionEvent event) { 081 if (LOG.isDebugEnabled()) { 082 LOG.debug("cancel"); 083 } 084 reset(); 085 } 086 087 public final int getIndex() { 088 return index; 089 } 090 091 /** 092 * Helper method to reset attributes 093 */ 094 public void reset() { 095 index = 0; 096 course = new ArrayList<WizardStep>(); 097 } 098 099 public List<WizardStep> getCourse() { 100 return course; 101 } 102 103 public int getSize() { 104 return course.size(); 105 } 106 107 public void register() { 108 109 if (index == course.size()) { // this is a new page 110 course.add(new WizardStep(index)); 111 } else if (index < course.size()) { 112 course.set(index, new WizardStep(index)); 113 } else { 114 throw new IllegalStateException("Index too large for course: index=" 115 + index + " course.size()=" + course.size()); 116 } 117 if (LOG.isInfoEnabled()) { 118 LOG.info("course: " + course); 119 } 120 } 121 122 public WizardStep getPreviousStep() { 123 if (index > 0) { 124 return course.get(index - 1); 125 } else { 126 return null; 127 } 128 } 129 public WizardStep getCurrentStep() { 130 return course.get(index); 131 } 132 133 public void removeForwardSteps() { 134 // todo 135 LOG.error("Not implemented yet"); 136 } 137 }