package org.apache.struts2.components;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.StrutsException;
import com.opensymphony.xwork2.util.OgnlUtil;
import com.opensymphony.xwork2.util.ValueStack;
/**
* <!-- START SNIPPET: javadoc -->
* <p>Renders an debug tag.</P>
*
* The debug information contain mostly stack information:
* <ul>
* <li>Value Stack Contents</li>
* <li>Stack Context</li>
* </ul>
* <!-- END SNIPPET: javadoc -->
*
* <p/> <b>Examples</b>
*
* <pre>
* <!-- START SNIPPET: example -->
* <ww:debug/>
* <!-- END SNIPPET: example -->
* </pre>
*
* @s.tag name="debug" tld-body-content="JSP" tld-tag-class="org.apache.struts2.views.jsp.ui.DebugTag"
* description="Render debug tag"
*/
public class Debug extends UIBean {
public static final String TEMPLATE = "debug";
public Debug(ValueStack stack, HttpServletRequest request, HttpServletResponse response) {
super(stack, request, response);
}
protected String getDefaultTemplate() {
return TEMPLATE;
}
public boolean start(Writer writer) {
boolean result = super.start(writer);
ValueStack stack = getStack();
Iterator iter = stack.getRoot().iterator();
List stackValues = new ArrayList(stack.getRoot().size());
while (iter.hasNext()) {
Object o = iter.next();
Map values;
try {
values = OgnlUtil.getBeanMap(o);
} catch (Exception e) {
throw new StrutsException("Caught an exception while getting the property values of " + o, e);
}
stackValues.add(new DebugMapEntry(o.getClass().getName(), values));
}
addParameter("stackValues", stackValues);
return result;
}
private class DebugMapEntry implements Map.Entry {
private Object key;
private Object value;
DebugMapEntry(Object key, Object value) {
this.key = key;
this.value = value;
}
public Object getKey() {
return key;
}
public Object getValue() {
return value;
}
public Object setValue(Object newVal) {
Object oldVal = value;
value = newVal;
return oldVal;
}
}
}