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1
5 package com.opensymphony.webwork.util;
6
7 import com.opensymphony.util.TextUtils;
8 import com.opensymphony.webwork.views.jsp.ui.OgnlTool;
9 import com.opensymphony.webwork.views.util.UrlHelper;
10 import com.opensymphony.xwork.ObjectFactory;
11 import com.opensymphony.xwork.util.OgnlValueStack;
12 import org.apache.commons.logging.Log;
13 import org.apache.commons.logging.LogFactory;
14
15 import javax.servlet.RequestDispatcher  ;
16 import javax.servlet.ServletOutputStream ;
17 import javax.servlet.http.HttpServletRequest ;
18 import javax.servlet.http.HttpServletResponse ;
19 import javax.servlet.http.HttpServletResponseWrapper ;
20 import java.io.IOException ;
21 import java.io.PrintWriter ;
22 import java.io.StringWriter ;
23 import java.net.URLEncoder ;
24 import java.util.*;
25
26
27
34 public class WebWorkUtil {
35
37 protected static final Log log = LogFactory.getLog(WebWorkUtil.class);
38
39
41 protected HttpServletRequest request;
42 protected HttpServletResponse response;
43 protected Map classes = new Hashtable();
44 protected OgnlTool ognl = OgnlTool.getInstance();
45 protected OgnlValueStack stack;
46
47
49 public WebWorkUtil(OgnlValueStack stack, HttpServletRequest request, HttpServletResponse response) {
50 this.stack = stack;
51 this.request = request;
52 this.response = response;
53 }
54
55
57 public Object bean(Object aName) throws Exception {
58 String name = aName.toString();
59 Class c = (Class ) classes.get(name);
60
61 if (c == null) {
62 c = ClassLoaderUtils.loadClass(name, WebWorkUtil.class);
63 classes.put(name, c);
64 }
65
66 return ObjectFactory.getObjectFactory().buildBean(c);
67 }
68
69 public Object findString(String name) {
70 return stack.findValue(name, String .class);
71 }
72
73 public String include(Object aName) throws Exception {
74 return include(aName, request, response);
75 }
76
77
80 public String include(Object aName, HttpServletRequest aRequest, HttpServletResponse aResponse) throws Exception {
81 try {
82 RequestDispatcher dispatcher = aRequest.getRequestDispatcher(aName.toString());
83
84 if (dispatcher == null) {
85 throw new IllegalArgumentException ("Cannot find included file " + aName);
86 }
87
88 ResponseWrapper responseWrapper = new ResponseWrapper (aResponse);
89
90 dispatcher.include(aRequest, responseWrapper);
91
92 return responseWrapper.getData();
93 }
94 catch (Exception e) {
95 e.printStackTrace();
96 throw e;
97 }
98 }
99
100 public String textToHtml(String s) {
101 return TextUtils.plainTextToHtml(s);
102 }
103
104 public String urlEncode(String s) {
105 return URLEncoder.encode(s);
106 }
107
108 public String buildUrl(String url) {
109 return UrlHelper.buildUrl(url, request, response, null);
110 }
111
112 public Object findValue(String expression, String className) throws ClassNotFoundException {
113 return stack.findValue(expression, Class.forName(className));
114 }
115
116
132 public List makeSelectList(String selectedList, String list, String listKey, String listValue) {
133 List selectList = new ArrayList();
134
135 Collection selectedItems = null;
136
137 Object i = stack.findValue(selectedList);
138
139 if (i != null) {
140 if (i.getClass().isArray()) {
141 selectedItems = Arrays.asList((Object []) i);
142 } else if (i instanceof Collection) {
143 selectedItems = (Collection) i;
144 } else {
145 selectedItems = new ArrayList();
147 selectedItems.add(i);
148 }
149 }
150
151 Collection items = (Collection) stack.findValue(list);
152
153 if (items != null) {
154 for (Iterator iter = items.iterator(); iter.hasNext();) {
155 Object element = (Object ) iter.next();
156 Object key = null;
157
158 if ((listKey == null) || (listKey.length() == 0)) {
159 key = element;
160 } else {
161 key = ognl.findValue(listKey, element);
162 }
163
164 Object value = null;
165
166 if ((listValue == null) || (listValue.length() == 0)) {
167 value = element;
168 } else {
169 value = ognl.findValue(listValue, element);
170 }
171
172 boolean isSelected = false;
173
174 if ((value != null) && (selectedItems != null) && selectedItems.contains(value)) {
175 isSelected = true;
176 }
177
178 selectList.add(new ListEntry(key, value, isSelected));
179 }
180 }
181
182 return selectList;
183 }
184
185 public String htmlEncode(Object obj) {
186 if (obj == null) {
187 return null;
188 }
189
190 return TextUtils.htmlEncode(obj.toString());
191 }
192
193 public int toInt(long aLong) {
194 return (int) aLong;
195 }
196
197 public long toLong(int anInt) {
198 return (long) anInt;
199 }
200
201 public long toLong(String aLong) {
202 if (aLong == null) {
203 return 0;
204 }
205
206 return Long.parseLong(aLong);
207 }
208
209 public String toString(long aLong) {
210 return Long.toString(aLong);
211 }
212
213 public String toString(int anInt) {
214 return Integer.toString(anInt);
215 }
216
217
219 static class ResponseWrapper extends HttpServletResponseWrapper {
220 StringWriter strout;
221 PrintWriter writer;
222 ServletOutputStream sout;
223
224 ResponseWrapper(HttpServletResponse aResponse) {
225 super(aResponse);
226 strout = new StringWriter ();
227 sout = new ServletOutputStreamWrapper(strout);
228 writer = new PrintWriter (strout);
229 }
230
231 public String getData() {
232 writer.flush();
233
234 return strout.toString();
235 }
236
237 public ServletOutputStream getOutputStream() {
238 return sout;
239 }
240
241 public PrintWriter getWriter() throws IOException {
242 return writer;
243 }
244 }
245
246 static class ServletOutputStreamWrapper extends ServletOutputStream {
247 StringWriter writer;
248
249 ServletOutputStreamWrapper(StringWriter aWriter) {
250 writer = aWriter;
251 }
252
253 public void write(int aByte) {
254 writer.write(aByte);
255 }
256 }
257 }
258 |
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