-package ibex.xt;
+package org.ibex.xt;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.StringWriter;
import java.io.Writer;
import java.io.IOException;
+import java.io.FileNotFoundException;
import java.util.*;
-import ibex.util.*;
-import ibex.js.*;
+import org.ibex.util.*;
+import org.ibex.js.*;
public class Template extends JSElement {
- public static Template parse(String path, Template.Scope s) throws IOException, XML.Exn {
+ public static Template parse(String path, Template.Scope s) throws FileNotFoundException, IOException {
Reader xmlreader = new BufferedReader(new InputStreamReader(new FileInputStream(path)));
XML.Document doc = new XML.Document();
doc.parse(xmlreader);
return new Template(doc.getRoot(), s);
}
- public static XML.Element wrap(XML.Element e, Template.Scope s) throws IOException, XML.Exn {
+ public static XML.Element wrap(XML.Element e, Template.Scope s) throws IOException {
final String uri = e.getUri();
if (uri.equals("http://xt.ibex.org/")) {
//#switch(e.getLocalName())
- case "if": e = new Template.If(e); break;
case "js": e = new Template.JSTag(e); break;
case "foreach": e = new Template.ForEach(e); break;
case "children": e = new Template.Children(e); break;
+ case "redirect": e = new Template.Redirect(e); break;
case "transaction": e = new Template.Transaction(e, s); break;
//#end
//#switch(uri.substring(19))
case "io": System.out.println("ibex.xt.io not yet implemented"); // TODO
//#end
- throw new RuntimeException("Unknown XT library: "+uri);
+ //throw new JSElement.Exn("Unknown XT library: "+uri);
} else if (uri.startsWith("local:")) {
Template t = parse(s.getLocalPath() + uri.substring(6), s);
if (c.size() > 0) {
// move all children from e to placeholder
XML.Element placeholder = findPlaceholder(t);
- if (placeholder == null) throw new RuntimeException(
+ if (placeholder == null) throw new JSElement.Exn(
"<"+e.getQName()+"> attempted to include children into a " +
"template which does not contain an <xt:children /> tag.");
// merge original attributes with replacement template
e = new JSElement.Merge(t, e);
+ }
- } else if (uri.startsWith("java:")) {
- e = new Java(e);
+ XML.Attributes a = e.getAttributes();
+ for (int i=0; i < a.attrSize(); i++) {
+ // FIXME: questionable abuse of XML namespaces here
+ if ("if".equals(a.getKey(i)) && (
+ "http://xt.ibex.org/".equals(e.getUri()) ||
+ "http://xt.ibex.org/".equals(a.getUri(i)))) {
+ e = new Template.IfWrap(e);
+ }
}
// wrap children
public JSScope getParentScope() { return tscope; }
+ public static final class IfWrap extends JSElement {
+ public IfWrap(XML.Element e) { super(e); }
- public static final class If extends JSElement {
- public If(XML.Element e) { super(e); }
-
- public void toXML(Writer w) throws IOException {
- super.toXML(w);
+ public void out(Writer w) throws IOException {
+ loadAttr();
try {
Object varIf = get("if"); if (varIf != null) undeclare("if");
- if (varIf != null && !Boolean.getBoolean((String)varIf)) return;
- } catch (JSExn e) { throw new RuntimeException(e); }
+ if (varIf != null && !"true".equals(varIf)) return;
+ } catch (JSExn e) { throw new JSElement.Exn(e); }
- List c = getChildren();
- for (int i=0; i < c.size(); i++) ((XML.Block)c.get(i)).toXML(w);
+ wrapped.out(w);
}
}
super(e);
List c = getChildren();
for (int i=0; i < c.size(); i++)
- if (c.get(i) instanceof XML.Element) throw new RuntimeException(
+ if (c.get(i) instanceof XML.Element) throw new JSElement.Exn(
"<"+getPrefix()+":js> tags may not have child elements");
}
- public void toXML(Writer w) throws IOException {
- super.toXML(w);
-
- try {
- Object varIf = get("if"); if (varIf != null) undeclare("if");
- if (varIf != null && !Boolean.getBoolean((String)varIf)) return;
+ public void out(Writer w) throws IOException {
+ loadAttr();
- List c = getChildren();
- StringWriter s = new StringWriter();
- for (int i=0; i < c.size(); i++) ((XML.Block)c.get(i)).toXML(s);
- exec(s.toString());
- } catch (JSExn e) { throw new RuntimeException(e); }
+ List c = getChildren();
+ StringWriter s = new StringWriter();
+ for (int i=0; i < c.size(); i++) ((Tree.Leaf)c.get(i)).out(s);
+ exec(s.toString());
}
}
public static final class ForEach extends JSElement {
public ForEach(XML.Element e) { super(e); }
- public void toXML(Writer w) throws IOException {
- super.toXML(w);
+ public void out(Writer w) throws IOException {
+ loadAttr();
try {
Object varIn = get("in"); if (varIn != null) undeclare("in");
Object varPut = get("put"); if (varPut != null) undeclare("put");
- Object varIf = get("if"); if (varIf != null) undeclare("if");
- if (varIf != null && !Boolean.getBoolean((String)varIf)) return;
varIn = exec("return (" + varIn + ");");
- if (varIn == null || (varIn instanceof JSArray)) throw new RuntimeException(
+ if (varIn == null || (varIn instanceof JSArray)) throw new JSElement.Exn(
"<"+getPrefix()+":foreach> requires attribute 'in' to specify " +
"the name of a valid js array in the current scope, not in='"+varIn+"'.");
if (varPut == null) varPut = "x";
else if (!(varPut instanceof String) || get(varPut) != null)
- throw new RuntimeException(
+ throw new JSElement.Exn(
"<"+getPrefix()+":foreach> 'put' attribute requires the name of "+
"an undeclared variable, not put='"+varPut+"'.");
- if (get(varPut) != null) throw new RuntimeException(
+ if (get(varPut) != null) throw new JSElement.Exn(
"<"+getPrefix()+":foreach> has no 'put' attribute defined and the "+
"default variable 'x' already exists in the current scope.");
declare((String)varPut);
Iterator it = ((JSArray)varIn).toList().iterator(); while (it.hasNext()) {
put(varPut, it.next());
- for (int i=0; i < c.size(); i++) ((XML.Block)c.get(i)).toXML(w);
+ for (int i=0; i < c.size(); i++) ((Tree.Leaf)c.get(i)).out(w);
}
- } catch (JSExn e) { throw new RuntimeException(e); }
+ } catch (JSExn e) { throw new JSElement.Exn(e); }
}
}
public Children(XML.Element e) { super(e); }
}
+ public static final class Redirect extends JSElement {
+ public Redirect(XML.Element e) { super(e); }
+
+ public void out(Writer w) throws IOException {
+ loadAttr();
+
+ try {
+ Object p = get("page"); if (p != null) undeclare("page");
+ if (p == null || !(p instanceof String) || ((String)p).trim().equals(""))
+ throw new JSElement.Exn("<"+getPrefix()+":redirect> requires 'page' "+
+ "attribute to be a valid template path");
+ throw new RedirectSignal((String)p);
+ } catch (JSExn e) { throw new JSElement.Exn(e); }
+ }
+ }
+
// TODO: finish
public static final class Transaction extends JSElement {
private final Template.Scope scope; // FIXME: HACK. unstatisise all tags, or do this to all
public Transaction(XML.Element e, Template.Scope s) { super(e); scope = s;} // TODO: check kids
- public void toXML(Writer w) throws IOException {
- super.toXML(w);
+ public void out(Writer w) throws IOException {
+ loadAttr();
// TODO: <xt:use />
List c = getChildren();
StringWriter sw = new StringWriter();
- for (int i=0; i < c.size(); i++) ((XML.Block)c.get(i)).toXML(sw);
+ for (int i=0; i < c.size(); i++) ((Tree.Leaf)c.get(i)).out(sw);
JS t = JS.fromReader("input", 0, new StringReader(sw.toString()));
t = JS.cloneWithNewParentScope(t, new JSScope(null));
scope.transaction(t);
}
}
- public static final class Java extends JSElement {
- // TODO what exactly?
- public Java(XML.Element w) { super(w); }
- }
-
public abstract static class Scope extends JSScope {
public Scope(JSScope j) { super(j); }
public abstract void transaction(JS t);
}
+ public static class Signal extends RuntimeException {}
+ public static class ReturnSignal extends Signal { }
+ public static class RedirectSignal extends Signal {
+ protected String target;
+ public RedirectSignal(String target) { super(); this.target = target; }
+ public String getTarget() { return target; }
+ }
}
projects / org.ibex.xt-crawshaw.git / blobdiff