public void process(TemplateMetaModelPlugin plugin) throws ProcessingException {
//
TemplatesMetaModel metaModel = application.getChild(TemplatesMetaModel.KEY);
// Evict templates that are out of date
log.log("Synchronizing existing templates " + templates.keySet());
for (Iterator<Template<?>> i = templates.values().iterator(); i.hasNext(); ) {
Template<?> template = i.next();
FileObject resource =
application.resolveResource(TemplatesMetaModel.LOCATION, template.getRelativePath());
if (resource == null) {
// That will generate a template not found error
i.remove();
log.log("Detected template removal " + template.getRelativePath());
} else if (resource.getLastModified() > template.getLastModified()) {
// That will force the regeneration of the template
i.remove();
log.log("Detected stale template " + template.getRelativePath());
} else {
log.log("Template " + template.getRelativePath() + " is valid");
}
}
// Build missing templates
log.log("Building missing templates");
Map<Path.Relative, Template<?>> copy = new HashMap<Path.Relative, Template<?>>(templates);
for (TemplateMetaModel templateMeta : metaModel) {
Template<?> template = copy.get(templateMeta.getPath());
if (template == null) {
log.log("Compiling template " + templateMeta.getPath());
ModelTemplateProcessContext compiler =
new ModelTemplateProcessContext(
templateMeta,
new HashMap<Path, Template<?>>(copy),
application.getProcessingContext());
Collection<Template<?>> resolved = compiler.resolve(templateMeta);
for (Template<?> added : resolved) {
copy.put(added.getRelativePath(), added);
}
}
}
templates = copy;
// Generate missing files from template
for (Template<?> template : templates.values()) {
//
Path originPath = template.getOrigin();
TemplateMetaModel templateMeta = metaModel.get(originPath);
//
// We compute the class elements from the field elements (as eclipse will make the
// relationship)
Set<Name> types = new LinkedHashSet<Name>();
for (TemplateRefMetaModel ref : templateMeta.getRefs()) {
ElementHandle.Field handle = ref.getHandle();
types.add(handle.getFQN());
}
final Element[] elements = new Element[types.size()];
int index = 0;
for (Name type : types) {
elements[index++] = application.getProcessingContext().getTypeElement(type);
}
// If CCE that would mean there is an internal bug
TemplateProvider<?> provider =
(TemplateProvider<?>) plugin.providers.get(template.getRelativePath().getExt());
// Resolve the qualified class
resolvedQualified(provider, template, elements);
//
resolveScript(template, plugin, elements);
}
}
private <M extends Serializable> void resolvedQualified(
TemplateProvider<?> provider, Template<M> template, Element[] elements) {
//
TemplatesMetaModel metaModel = application.getChild(TemplatesMetaModel.KEY);
//
Path.Relative path = template.getRelativePath();
if (classCache.containsKey(path)) {
log.log("Template class " + path + " was found in cache");
return;
}
//
Path.Absolute resolvedPath = metaModel.resolvePath(path);
//
Writer writer = null;
try {
// Template qualified class
FileObject classFile =
application.getProcessingContext().createSourceFile(resolvedPath.getName(), elements);
writer = classFile.openWriter();
writer.append("package ").append(resolvedPath.getDirs()).append(";\n");
writer.append("import ").append(TemplateDescriptor.class.getCanonicalName()).append(";\n");
writer.append("import ").append(TemplatePlugin.class.getCanonicalName()).append(";\n");
writer.append("@").append(Generated.class.getName()).append("({})\n");
writer
.append("@")
.append(juzu.Path.class.getName())
.append("(\"")
.append(path.getValue())
.append("\")\n");
writer
.append("public class ")
.append(path.getRawName())
.append(" extends ")
.append(juzu.template.Template.class.getName())
.append("\n");
writer.append("{\n");
writer.append("@javax.inject.Inject\n");
writer
.append("public ")
.append(path.getRawName())
.append("(")
.append(TemplatePlugin.class.getSimpleName())
.append(" templatePlugin")
.append(")\n");
writer.append("{\n");
writer
.append("super(templatePlugin, \"")
.append(path.getValue())
.append("\"")
.append(", ")
.append(provider.getTemplateStubType().getName())
.append(".class);\n");
writer.append("}\n");
//
writer
.append("public static final ")
.append(TemplateDescriptor.class.getName())
.append(" DESCRIPTOR = new ")
.append(TemplateDescriptor.class.getName())
.append("(")
.append(resolvedPath.getName())
.append(".class,")
.append(provider.getTemplateStubType().getName())
.append(".class")
.append(");\n");
//
String baseBuilderName = juzu.template.Template.Builder.class.getCanonicalName();
if (template.getParameters() != null) {
// Implement abstract method with this class Builder covariant return type
writer.append("public Builder builder() {\n");
writer.append("return new Builder();\n");
writer.append("}\n");
// Covariant return type of with()
writer.append("public Builder with() {\n");
writer.append("return (Builder)super.with();\n");
writer.append("}\n");
// Setters on builders
writer.append("public class Builder extends ").append(baseBuilderName).append("\n");
writer.append("{\n");
for (String paramName : template.getParameters()) {
writer
.append("public Builder ")
.append(paramName)
.append("(Object ")
.append(paramName)
.append(") {\n");
writer.append("set(\"").append(paramName).append("\",").append(paramName).append(");\n");
writer.append("return this;\n");
writer.append(("}\n"));
}
writer.append("}\n");
} else {
// Implement abstract factory method
writer.append("public ").append(baseBuilderName).append(" builder() {\n");
writer.append("return new ").append(baseBuilderName).append("();\n");
writer.append("}\n");
}
// Close class
writer.append("}\n");
//
classCache.put(path, classFile);
//
log.log(
"Generated template class "
+ path
+ " as "
+ classFile.toUri()
+ " with originating elements "
+ Arrays.asList(elements));
} catch (IOException e) {
throw TemplateMetaModel.CANNOT_WRITE_TEMPLATE_CLASS.failure(e, elements[0], path);
} finally {
Tools.safeClose(writer);
}
}