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Java > Open Source Codes > com > jcorporate > expresso > ext > taglib > Context


1 /* ====================================================================
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64
65 package com.jcorporate.expresso.ext.taglib;
66
67 import com.jcorporate.expresso.core.db.DBException;
68 import com.jcorporate.expresso.core.misc.ConfigManager;
69 import com.jcorporate.expresso.core.misc.ConfigurationException;
70 import com.jcorporate.expresso.core.misc.CurrentLogin;
71 import com.jcorporate.expresso.kernel.util.FastStringBuffer;
72 import com.jcorporate.expresso.services.dbobj.SchemaList;
73
74 import javax.servlet.jsp.JspTagException JavaDoc;
75 import javax.servlet.jsp.JspWriter JavaDoc;
76 import javax.servlet.jsp.PageContext JavaDoc;
77 import javax.servlet.jsp.tagext.Tag JavaDoc;
78 import javax.servlet.jsp.tagext.TagSupport JavaDoc;
79 import java.io.IOException JavaDoc;
80
81
82 /**
83  * A simple tag to provide the context path and/or the "expresso"
84  * directory. Optionally figure out context paths for specific
85  * schema's as well
86  *
87  * @author Michael Nash
88  */
89 public class Context
90         extends TagSupport JavaDoc {
91     private String JavaDoc schema = null;
92
93     public Context() {
94         super();
95     }
96
97     public int doStartTag()
98             throws javax.servlet.jsp.JspTagException JavaDoc {
99         String JavaDoc dbName = "default";
100         CurrentLogin cl = (CurrentLogin) pageContext.getAttribute(CurrentLogin.LOGIN_KEY,
101                 PageContext.SESSION_SCOPE);
102
103         if (cl != null) {
104             dbName = cl.getDBName();
105         }
106
107         String JavaDoc contextPath = ConfigManager.getContextPath();
108         JspWriter JavaDoc writer = pageContext.getOut();
109
110         try {
111             if (schema != null) {
112                 SchemaList sl = new SchemaList();
113                 sl.setDataContext(dbName);
114                 sl.setField("SchemaClass", schema);
115                 sl.retrieve();
116                 FastStringBuffer fsb = FastStringBuffer.getInstance();
117                 try {
118                     fsb.append(contextPath);
119                     fsb.append("/");
120                     fsb.append(ConfigManager.getContext(dbName).getExpressoDir());
121                     fsb.append("/components/");
122                     fsb.append(sl.getField("ComponentCode"));
123
124 // writer.print(contextPath + "/" +
125 // ConfigManager.getContext(dbName).getExpressoDir() +
126 // "/components/" + sl.getField("ComponentCode"));
127 writer.print(fsb.toString());
128                 } finally {
129                     fsb.release();
130                 }
131             } else {
132                 writer.print(contextPath);
133             }
134         } catch (IOException JavaDoc ie) {
135             throw new JspTagException JavaDoc("IO Exception:" + ie.getMessage());
136         } catch (DBException de) {
137             throw new JspTagException JavaDoc("DB Exception:" + de.getMessage());
138         } catch (ConfigurationException ce) {
139             throw new JspTagException JavaDoc("Configuration Exception:" +
140                     ce.getMessage());
141         }
142
143         return Tag.SKIP_BODY;
144     }
145
146     public String JavaDoc getSchema() {
147         return schema;
148     }
149
150     public void setSchema(String JavaDoc newSchema) {
151         schema = newSchema;
152     }
153 } /* Context */
154
155 /* Context */
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