Working with Arrays
The “Hello, SOAP!” application from Chapter 4 illustrated the passing of strings and primitive data types. The next step up the SOAP ladder is working with arrays. Fortunately, Apache SOAP provides built-in support for arrays, making this task relatively painless.
To illustrate the basic concepts, we will create a simple e-commerce product catalog. Clients can connect to the catalog service and send a list of stockkeeping units (SKUs). The catalog service looks up each SKU and returns a list of current prices. Behind the scenes, the client passes an array of strings to the server, and the server returns an array of doubles.
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