Slice and array???

[surfer]

Hello,

I've a question about Slice:
How is it possible to define a transmit or return value of an array?
In the documentation I didn't found some examples by using an array.


example how I would like to use it at XXX.java:

public String[] getArray(Ice.Current current){
    	String [] array = new String[100];
	array[0] = "test1";
	array[1] = "test2";
	array[2] = "test3";
	................
    	
    	return array 
}


public int getArraySize(String[] array, Ice.Current current){
	int iSize = array.length; 
    	return iSize 
}

but how is the definition in Slice XXX.ice:

#ifndef XXX_ICE
#define XXX_ICE

// here the array definitions ?????????????????

module YYY
{
interface xxx
{
    nonmutating string String[] getArray();
    nonmutating int getArraySize(String[] array);
};
};
#endif

Has somebody an solution or example ?


Thanks a lot greetings surfer

[marc]

You must use sequences. Please see the Ice manual for details.

[surfer]

Hallo Marc,

thanks a lot for your tip !!!

Here the code which works for me. Please correct me if something is wrong.


Hello.ice:

#ifndef HELLO_ICE
#define HELLO_ICE

module Demo
{
exception GenericError {
    	string reason;
    };

sequence<string> sa;

interface Hello
{

    nonmutating void sayHello();
    idempotent void shutdown();
    nonmutating sa getArray();
    nonmutating void sendArray(sa text);
};

};

#endif

HelloI.java:

public String[]
    getArray(Ice.Current current)
    {
	    array = new String[100];
	    array[0] = "Test0";
	    array[1] = "Test1";
	    array[2] = "Test2";
	    array[3] = "Test3";
	    
        return array;
    }
    
    public void
    sendArray(String[] arrayGet, Ice.Current current)
    {
	    array = arrayGet;
	    int iCounter = 0;
	    while(iCounter<4){
		    String s = array[iCounter];
		    System.out.println("Array content "+iCounter+":>"+s);		    
            iCounter++;
	    }
    }

Client.java:

if(line.equals("t"))
                {
                    twoway.sayHello();
			        String[] sa = twoway.getArray();
			        int iCounter = 0;
			        while(iCounter<4){
			            String s = sa[iCounter];
			            System.out.println("Client content "+iCounter+":>"+s);		    
                        iCounter++;
                    }
	        
			
                }
                else if(line.equals("o"))
                {
                    oneway.sayHello();
			        String[] array = new String[100];
			        array[0] = "C_Test0";
			        array[1] = "C_Test1";
			        array[2] = "C_Test2";
			        array[3] = "C_Test3";
			        twoway.sendArray(array);
                }

Thanks a lot
greetings surfer

[michi]

[quote=surfer]

public String[]
    getArray(Ice.Current current)
    {
	    array = new String[100];
	    array[0] = "Test0";
	    array[1] = "Test1";
	    array[2] = "Test2";
	    array[3] = "Test3";
	    
        return array;
    }
    
    public void
    sendArray(String[] arrayGet, Ice.Current current)
    {
	    array = arrayGet;
	    int iCounter = 0;
	    while(iCounter<4){
		    String s = array[iCounter];
		    System.out.println("Array content "+iCounter+":>"+s);		    
            iCounter++;
	    }
    }

Why allocate an array of 100 elements when you are sending only four elements? When you return this array, the Ice run time will marshal 4 non-empty strings, followed by 96 empty strings.

Client.java:

                    twoway.sayHello();
			        String[] sa = twoway.getArray();
			        int iCounter = 0;
			        while(iCounter<4){
			            String s = sa[iCounter];
			            System.out.println("Client content "+iCounter+":>"+s);		    
                        iCounter++;
                    }

When receiving the array, use the array length to bound the loop:

String[] sa = twoway.getArray();
int iCounter = 0;
while(iCounter < sa.length)
    System.out.println(sa[iCounter]);

Cheers,

Michi.

[surfer]

Hello michi,

thanks for your answer,
I've just set the array size to 100 for testing not for special use.
But I will attend that in my application.

Thanks a lot
greetings surfer