com.sap.pdms.commons.util

Class Functions

java.lang.Object

com.sap.pdms.commons.util.Functions

public final class Functions
extends Object

The Functions class contains static functions that are commonly needed by most Insight Providers.

Method Summary

Modifier and Type	Method and Description
static <T> T	convertFromJSON(String json, Class<T> type) Converts a JSON String into a Java object.
static String	convertToJSON(Object obj) Converts an Object to a string representation of itself in JSON format.
static String	epochToUTC(long millis) Converts a timestamp in Unix time to a timestamp String.
static Calendar	epochToUTCTimestamp(long millis) Converts a timestamp in Unix time to a Calendar instance.
static String	fromStream(InputStream in)
static javax.ws.rs.core.Response	getJsonResponse(javax.ws.rs.core.Response.Status status, String json) Returns an HTTP Response object with the passed status argument as its status code and json as its message.
static javax.ws.rs.core.Response	getResponse(javax.ws.rs.core.Response.Status status) Returns an HTTP Response object with the passed argument as its status code.
static int	isSqlNameInjectionSafe(javax.persistence.EntityManager em, String value) Uses HANA functionality to determine whether a SQL command is injection safe.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

epochToUTC

public static String epochToUTC(long millis)

Converts a timestamp in Unix time to a timestamp String. The resulting String is in format yyyy-MM-dd HH:mm:ss.SSS

Parameters:

millis - the Unix timestamp in milliseconds since 00:00:00 UTC on 1 January 1970

Returns:

an equivalent timestamp String in format yyyy-MM-dd HH:mm:ss.SSS

epochToUTCTimestamp

public static Calendar epochToUTCTimestamp(long millis)

Converts a timestamp in Unix time to a Calendar instance. The resulting Calendar instance is set to the time represented by the Unix timestamp in the Gregorian Calendar.

Parameters:

millis - the Unix timestamp in milliseconds since 00:00:00 UTC on 1 January 1970

Returns:

an equivalent timestamp String in format yyyy-MM-dd HH:mm:ss.SSS

convertToJSON

public static String convertToJSON(Object obj)

Converts an Object to a string representation of itself in JSON format.

Parameters:

obj - the object to be converted

Returns:

a String representation of the Object

convertFromJSON

public static <T> T convertFromJSON(String json,
                                    Class<T> type)

Converts a JSON String into a Java object.

Type Parameters:

T - the resulting Java object type that should be created from the JSON String

Parameters:

json - the JSON String to be converted

type - the class of the resulting Java object type that should be created from the JSON String

Returns:

a Java object of type type

fromStream

public static String fromStream(InputStream in)
                         throws IOException

Throws:

IOException

getResponse

public static javax.ws.rs.core.Response getResponse(javax.ws.rs.core.Response.Status status)

Returns an HTTP Response object with the passed argument as its status code. The resulting object has PDMS compliant no-cache, no-store cache header settings.

Parameters:

status - the HTTP status

Returns:

HTTP Response object with the passed argument as its status code

getJsonResponse

public static javax.ws.rs.core.Response getJsonResponse(javax.ws.rs.core.Response.Status status,
                                                        String json)

Returns an HTTP Response object with the passed status argument as its status code and json as its message. The resulting object has PDMS compliant no-cache, no-store cache header settings.

Parameters:

status - the HTTP status

json - the JSON to be returned with the response

Returns:

HTTP Response object with the passed argument as its status code

isSqlNameInjectionSafe

public static int isSqlNameInjectionSafe(javax.persistence.EntityManager em,
                                         String value)

Uses HANA functionality to determine whether a SQL command is injection safe.

Parameters:

em - the EntityManager that should be used to manage the transaction

value - the SQL expression that should be checked for SQL injection

Returns:

1 if no possible SQL injection is found, otherwise 0