Planning alternative JSON-UIDL implementation approach

svn changeset:1614/svn branch:trunk

diff --git a/src/com/itmill/toolkit/terminal/gwt/server/JSONPaintTarget.java b/src/com/itmill/toolkit/terminal/gwt/server/JSONPaintTarget.java
new file mode 100644 (file)
index 0000000..eec6864
--- /dev/null
+++ b/src/com/itmill/toolkit/terminal/gwt/server/JSONPaintTarget.java
@@ -0,0 +1,160 @@
+package com.itmill.toolkit.terminal.gwt.server;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Stack;
+
+import com.itmill.toolkit.Application;
+import com.itmill.toolkit.terminal.ApplicationResource;
+import com.itmill.toolkit.terminal.ExternalResource;
+import com.itmill.toolkit.terminal.PaintException;
+import com.itmill.toolkit.terminal.PaintTarget;
+import com.itmill.toolkit.terminal.Paintable;
+import com.itmill.toolkit.terminal.Resource;
+import com.itmill.toolkit.terminal.ThemeResource;
+import com.itmill.toolkit.terminal.VariableOwner;
+
+public class JSONPaintTarget implements PaintTarget {
+
+       Stack tags = new Stack();
+       Tag tag = null;
+
+       public void addAttribute(String name, boolean value) throws PaintException {
+               tag.attrs.put(name, new Boolean(value));
+       }
+
+       public void addAttribute(String name, int value) throws PaintException {
+               tag.attrs.put(name, new Integer(value));
+       }
+
+       public void addAttribute(String name, Resource value) throws PaintException {
+               if (value instanceof ExternalResource) {
+                       addAttribute(name, ((ExternalResource) value).getURL());
+
+               } else if (value instanceof ApplicationResource) {
+                       ApplicationResource r = (ApplicationResource) value;
+                       Application a = r.getApplication();
+                       if (a == null)
+                               throw new PaintException(
+                                               "Application not specified for resorce "
+                                                               + value.getClass().getName());
+                       String uri = a.getURL().getPath();
+                       if (uri.charAt(uri.length() - 1) != '/')
+                               uri += "/";
+                       uri += a.getRelativeLocation(r);
+                       addAttribute(name, uri);
+
+               } else if (value instanceof ThemeResource) {
+                       String uri = "theme://" + ((ThemeResource) value).getResourceId();
+                       addAttribute(name, uri);
+               } else
+                       throw new PaintException("Ajax adapter does not "
+                                       + "support resources of type: "
+                                       + value.getClass().getName());
+       }
+
+       public void addAttribute(String name, long value) throws PaintException {
+               tag.attrs.put(name, new Long(value));
+       }
+
+       public void addAttribute(String name, String value) throws PaintException {
+               tag.attrs.put(name, value);
+       }
+
+       public void addCharacterData(String text) throws PaintException {
+               if (tag.data != null || tag.xml != null || tag.children.size() > 0)
+                       throw new IllegalStateException("Character data can not be combined with XML or child-nodes");
+               tag.data = text;
+       }
+
+       public void addSection(String sectionTagName, String sectionData)
+                       throws PaintException {
+               Tag t = new Tag(sectionTagName);
+               t.data = sectionData;
+               if (tag.data != null || tag.xml != null)
+                       throw new IllegalStateException("Children can not be combined with XML or chardata");
+               tag.children.add(t);
+       }
+
+       public void addText(String text) throws PaintException {
+               if (tag.data != null || tag.xml != null || tag.children.size() > 0)
+                       throw new IllegalStateException("Text-data can not be combined with XML or child-nodes");
+               tag.data = text;
+       }
+
+       public void addUIDL(String uidl) throws PaintException {
+               if (tag.data != null || tag.xml != null || tag.children.size() > 0)
+                       throw new IllegalStateException("XML can not be combined with text or child-nodes");
+               tag.xml = uidl;
+       }
+
+       public void addUploadStreamVariable(VariableOwner owner, String name)
+                       throws PaintException {
+               // TODO Auto-generated method stub
+
+       }
+
+       public void addVariable(VariableOwner owner, String name, String value)
+                       throws PaintException {
+               // TODO Auto-generated method stub
+
+       }
+
+       public void addVariable(VariableOwner owner, String name, int value)
+                       throws PaintException {
+               // TODO Auto-generated method stub
+
+       }
+
+       public void addVariable(VariableOwner owner, String name, boolean value)
+                       throws PaintException {
+               // TODO Auto-generated method stub
+
+       }
+
+       public void addVariable(VariableOwner owner, String name, String[] value)
+                       throws PaintException {
+               // TODO Auto-generated method stub
+
+       }
+
+       public void addXMLSection(String sectionTagName, String sectionData,
+                       String namespace) throws PaintException {
+               // TODO Auto-generated method stub
+
+       }
+
+       public void endTag(String tagName) throws PaintException {
+               
+       }
+
+       public boolean startTag(Paintable paintable, String tag)
+                       throws PaintException {
+               // TODO Auto-generated method stub
+               return false;
+       }
+
+       public void startTag(String tagName) throws PaintException {
+               // TODO Auto-generated method stub
+
+       }
+
+       private class Tag {
+               HashMap attrs = new HashMap();
+
+               ArrayList children = new ArrayList();
+
+               ArrayList vars = new ArrayList();
+
+               String xml = null;
+               
+               String data = null;
+               
+               String tag;
+               
+               Tag(String tag) {
+                       this.tag = tag;
+               }
+       }
+
+}