package er.rest.format;
import net.sf.json.JSON;
import net.sf.json.JSONSerializer;
import net.sf.json.JsonConfig;
import er.extensions.foundation.ERXProperties;
import er.rest.ERXRestContext;
import er.rest.ERXRestRequestNode;
import er.rest.ERXRestUtils;
/**
* @property <code>er.rest.format.ERXJSONRestWriter.shouldPrettyPrint</code> Boolean property to enable pretty-printing of JSON response. Defaults to false.
* @property <code>er.rest.format.ERXJSONRestWriter.prettyPrintIndent</code> Integer property to set the pretty print indentation space count. Defaults to <code>2</code>.
*/
public class ERXJSONRestWriter implements IERXRestWriter {
// Lazily initialized static constants
private static class CONSTANTS {
final static boolean SHOULD_PRETTY_PRINT = ERXProperties.booleanForKeyWithDefault("er.rest.format.ERXJSONRestWriter.shouldPrettyPrint", false);
final static int PRETTY_PRINT_INDENT = ERXProperties.intForKeyWithDefault("er.rest.format.ERXJSONRestWriter.prettyPrintIndent", 2);
}
public ERXJSONRestWriter() {
}
protected JsonConfig configWithContext(ERXRestContext context) {
return _ERXJSONConfig.createDefaultConfig(context);
}
protected ERXRestRequestNode processNode(ERXRestRequestNode node) {
return node;
}
public void appendHeadersToResponse(ERXRestRequestNode node, IERXRestResponse response, ERXRestContext context) {
response.setHeader("application/json", "Content-Type");
}
public void appendToResponse(ERXRestRequestNode node, IERXRestResponse response, ERXRestFormat.Delegate delegate, ERXRestContext context) {
node = processNode(node);
if (node != null) {
node._removeRedundantTypes();
}
appendHeadersToResponse(node, response, context);
Object object = node.toJavaCollection(delegate);
if (object == null) {
response.appendContentString("undefined");
}
else if (ERXRestUtils.isPrimitive(object)) {
response.appendContentString(String.valueOf(object));
}
else {
JSON jsonObject = JSONSerializer.toJSON(object, configWithContext(context));
String json = (CONSTANTS.SHOULD_PRETTY_PRINT ? jsonObject.toString(CONSTANTS.PRETTY_PRINT_INDENT) : jsonObject.toString());
response.appendContentString(json);
}
response.appendContentString("\n");
}
}