sysLib.javaStore

The system function sysLib.javaStore invokes a method and places the returned object (or null) into the EGL Java object space, along with a specified identifier. If the identifier is already in the object space, the action is equivalent to the following steps:

If the method returns a Java primitive instead of an object, EGL stores an object that represents the primitive; for example, if the method returns an int, EGL stores an object of type java.lang.Integer.

sysLib.javaStore syntax diagram

storeId

The identifier to store with the returned object.

This argument is either a string literal or an item of type CHAR, DBCHAR, MBCHAR, or UNICODE. The identifier must be cast to objID, as in a later example. EGL strips single- and double-byte blanks from the beginning and end of the argument value, which is case sensitive.

identifierOrClass

This argument is one of the following entities:

An identifier that refers to an object in the object space; or
The fully qualified name of a Java class.

This argument is either a string literal or an item of type CHAR, DBCHAR, MBCHAR, or UNICODE. If you are specifying an identifier of an object, the identifier must be cast to objID, as in a later example. EGL strips single- and double-byte blanks from the beginning and end of the argument value, which is case sensitive.

method

The method to invoke.

argument

A value passed to the method.

A cast may be required, as specified in Java access (system words).

The Java type-conversion rules are in effect. No error occurs, for example, if you pass a short to a method parameter that is declared as an int.

To avoid losing precision, use an EGL float item for a Java double, and an EGL smallfloat item for a Java float. Using one of the other EGL types will probably result in a value being rounded.

The memory area in the invoking program does not change regardless of what the method does.

An example is as follows:

  sysLib.javaStore( (objId)"storeId", (objId)"myId", 
    "myMethod", 36 );

An error during processing of sysLib.javaStore can set sysVar.errorCode to a value listed in the next table.

Value in sysVar.errorCode	Description
00001000	An exception was thrown by an invoked method or as a result of a class initialization
00001001	The object was null, or the specified identifier was not in the object space
00001002	A public method, field, or class with the specified name does not exist or cannot be loaded
00001003	The EGL primitive type does not match the type expected in Java
00001006	The class of an argument cast to null could not be loaded
00001007	A SecurityException or IllegalAccessException was thrown during an attempt to get information about a method or field; or an attempt was made to set the value of a field that was declared final
00001009	An identifier rather than a class name must be specified; the method or field is not static

Related concepts
Java access functions

Related tasks
Java access (system words)