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POHow does Java generate signatures for Methods?
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  1. POHow does Java generate signatures for Methods?
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    copied!<p>I have an Java class with a static final method getAll:</p> <pre><code>public static final Vector&lt;Category&gt; getAll(Context context, ContentValues where) { ArrayList&lt;Integer&gt; IDs = null; if(where != null &amp;&amp; where.containsKey(DatabaseAdapter.KEY_PRODUCT)) { IDs = OvertureItem.getAll(context, DatabaseAdapter.TABLE_PRODUCT_CATEGORY, new String[] { DatabaseAdapter.KEY_CATEGORY }, where); } else { IDs = OvertureItem.getAll(context, DatabaseAdapter.TABLE_CATEGORIES, where); } Vector&lt;Category&gt; categories = new Vector&lt;Category&gt;(); for(Integer id: IDs) { categories.add(Category.get(context, id)); } return categories; } </code></pre> <p>Now I want to hand in null as a value for the where statemant so that it will just be ignored later on in the code. Anyway in the testcase for this method I have:</p> <pre><code>Vector&lt;Category&gt; categories = Category.getAll(context, null); </code></pre> <p>Which then in turn gives me a <strong>NoSuchMethodError</strong>. I don't know exactly why it does that. The only thing I could imagine is that the null I hand in would not match the signature of the above method. But how can I overcome this? I already thought of overloading. But this would just end in rewriting most of the code. At least when I do it, how I think. </p> <p>Any suggestions on that?</p> <p>Phil</p> <p>P.S. This is the stack trace I get:</p> <pre><code>java.lang.NoSuchMethodError: com.sap.catalogue.model.Category.getAll at com.sap.overture.test.model.CategoryTest.testGetAll(CategoryTest.java:59) at java.lang.reflect.Method.invokeNative(Native Method) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154) at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:430) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1447) </code></pre>
 

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