public CharSequence apply(ImportManager importManager) {
JvmOperation cacheMethod =
(JvmOperation)
logicalContainerProvider.getLogicalContainer(createExtensionInfo.getCreateExpression());
StringBuilderBasedAppendable appendable = new StringBuilderBasedAppendable(importManager);
JvmDeclaredType containerType = cacheMethod.getDeclaringType();
JvmTypeReference listType = typeReferences.getTypeForName(ArrayList.class, containerType);
JvmTypeReference collectonLiterals =
typeReferences.getTypeForName(CollectionLiterals.class, containerType);
String cacheVarName = cacheField.getSimpleName();
String cacheKeyVarName = appendable.declareVariable("CacheKey", "_cacheKey");
appendable.append("final ");
typeReferenceSerializer.serialize(listType, containerType, appendable);
appendable.append(cacheKeyVarName).append(" = ");
typeReferenceSerializer.serialize(collectonLiterals, containerType, appendable);
appendable.append(".newArrayList(");
EList<JvmFormalParameter> list = cacheMethod.getParameters();
for (Iterator<JvmFormalParameter> iterator = list.iterator(); iterator.hasNext(); ) {
JvmFormalParameter jvmFormalParameter = iterator.next();
appendable.append(getVarName(jvmFormalParameter));
if (iterator.hasNext()) {
appendable.append(", ");
}
}
appendable.append(");");
// declare result variable
JvmTypeReference returnType = typeProvider.getType(createExtensionInfo.getCreateExpression());
appendable.append("\nfinal ");
typeReferenceSerializer.serialize(returnType, containerType, appendable);
String resultVarName = "_result";
appendable.append(" ").append(resultVarName).append(";");
// open synchronize block
appendable.append("\nsynchronized (").append(cacheVarName).append(") {");
appendable.increaseIndentation();
// if the cache contains the key return the previously created object.
appendable
.append("\nif (")
.append(cacheVarName)
.append(".containsKey(")
.append(cacheKeyVarName)
.append(")) {");
appendable.increaseIndentation();
appendable
.append("\nreturn ")
.append(cacheVarName)
.append(".get(")
.append(cacheKeyVarName)
.append(");");
appendable.decreaseIndentation().append("\n}");
// execute the creation
compiler.toJavaStatement(createExtensionInfo.getCreateExpression(), appendable, true);
appendable.append("\n");
appendable.append(resultVarName).append(" = ");
compiler.toJavaExpression(createExtensionInfo.getCreateExpression(), appendable);
appendable.append(";");
// store the newly created object in the cache
appendable
.append("\n")
.append(cacheVarName)
.append(".put(")
.append(cacheKeyVarName)
.append(", ")
.append(resultVarName)
.append(");");
// close synchronize block
appendable.decreaseIndentation();
appendable.append("\n}");
appendable
.append("\n")
.append(initializerMethod.getSimpleName())
.append("(")
.append(resultVarName);
for (JvmFormalParameter parameter : cacheMethod.getParameters()) {
appendable.append(", ").append(parameter.getName());
}
appendable.append(");");
// return the result
appendable.append("\nreturn ");
appendable.append(resultVarName).append(";");
return appendable.toString();
}