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1
52
53 package freemarker.ext.jsp;
54
55 import java.io.IOException  ;
56
57 import javax.servlet.ServletException ;
58 import javax.servlet.jsp.JspException ;
59 import javax.servlet.jsp.PageContext ;
60 import javax.servlet.jsp.tagext.BodyContent ;
61 import javax.servlet.jsp.tagext.BodyTag ;
62 import javax.servlet.jsp.tagext.Tag ;
63
64 import freemarker.template.SimpleHash;
65 import freemarker.template.Template;
66
67
73 public class FreemarkerTag implements BodyTag
74 {
75 private Tag parent;
76 private BodyContent bodyContent;
77 private PageContext pageContext;
78 private SimpleHash root;
79 private Template template;
80 private boolean caching = true;
81 private String name = "";
82
83 public boolean getCaching()
84 {
85 return caching;
86 }
87
88 public void setCaching(boolean caching)
89 {
90 this.caching = caching;
91 }
92
93 public void setName(String name)
94 {
95 this.name = name == null ? "" : name;
96 }
97
98 public Tag getParent()
99 {
100 return parent;
101 }
102
103 public void setParent(Tag parent)
104 {
105 this.parent = parent;
106 }
107
108 public int doStartTag()
109 {
110 return EVAL_BODY_BUFFERED;
111 }
112
113 public void setBodyContent(BodyContent bodyContent)
114 {
115 this.bodyContent = bodyContent;
116 }
117
118 public void setPageContext(PageContext pageContext)
119 {
120 this.pageContext = pageContext;
121 root = null;
122 }
123
124 public void doInitBody()
125 {
126 }
127
128 public int doAfterBody()
129 {
130 return SKIP_BODY;
131 }
132
133 public void release()
134 {
135 root = null;
136 template = null;
137 name = "";
138 }
139
140 public int doEndTag()
141 throws JspException
142 {
143 if (bodyContent == null)
144 return EVAL_PAGE;
145
146 try
147 {
148 if(template == null)
149 {
150 template = new Template(name, bodyContent.getReader());
151 }
152
153 if(root == null)
154 {
155 root = new SimpleHash();
156 root.put("page", new JspContextModel(pageContext, JspContextModel.PAGE_SCOPE));
157 root.put("request", new JspContextModel(pageContext, JspContextModel.REQUEST_SCOPE));
158 root.put("session", new JspContextModel(pageContext, JspContextModel.SESSION_SCOPE));
159 root.put("application", new JspContextModel(pageContext, JspContextModel.APPLICATION_SCOPE));
160 root.put("any", new JspContextModel(pageContext, JspContextModel.ANY_SCOPE));
161 }
162 template.process(root, pageContext.getOut());
163 }
164 catch(Exception e)
165 {
166 try
167 {
168 pageContext.handlePageException(e);
169 }
170 catch(ServletException e2)
171 {
172 throw new JspException (e2.getMessage());
173 }
174 catch(IOException e2)
175 {
176 throw new JspException (e2.getMessage());
177 }
178 }
179 finally
180 {
181 if(!caching)
182 {
183 template = null;
184 }
185 }
186
187 return EVAL_PAGE;
188 }
189 }
190 |
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