Tool treats streams from non-internal APIs as new streams

[khatchad]

Related to #103.

Consider this test case:

class A {
	Stream<Object> m() {
		Stream<Object> stream = new HashSet<>().parallelStream();
		return stream;
	}

	void n() {
		Stream<Object> s = m();
		s.count();
	}
}

-- Error Log from JUnit --
Class: edu.cuny.hunter.streamrefactoring.ui.tests.ConvertStreamToParallelRefactoringTest
Method: testNonInternalAPI
Actual: null
Expected: null
Stack Trace:
java.lang.NullPointerException
	at edu.cuny.hunter.streamrefactoring.core.analysis.Stream.inferInitialOrdering(Stream.java:580)
	at edu.cuny.hunter.streamrefactoring.core.analysis.Stream.<init>(Stream.java:194)
	at edu.cuny.hunter.streamrefactoring.core.analysis.StreamAnalysisVisitor.visit(StreamAnalysisVisitor.java:51)
	at org.eclipse.jdt.core.dom.MethodInvocation.accept0(MethodInvocation.java:231)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2796)
	at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2844)
	at org.eclipse.jdt.core.dom.VariableDeclarationFragment.accept0(VariableDeclarationFragment.java:263)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2796)
	at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2867)
	at org.eclipse.jdt.core.dom.VariableDeclarationStatement.accept0(VariableDeclarationStatement.java:267)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2796)
	at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2867)
	at org.eclipse.jdt.core.dom.Block.accept0(Block.java:137)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2796)
	at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2844)
	at org.eclipse.jdt.core.dom.MethodDeclaration.accept0(MethodDeclaration.java:635)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2796)
	at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2867)
	at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:470)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2796)
	at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2867)
	at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:257)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2796)
	at edu.cuny.hunter.streamrefactoring.ui.tests.ConvertStreamToParallelRefactoringTest.helper(ConvertStreamToParallelRefactoringTest.java:258)
	at edu.cuny.hunter.streamrefactoring.ui.tests.ConvertStreamToParallelRefactoringTest.testNonInternalAPI(ConvertStreamToParallelRefactoringTest.java:431)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at junit.framework.TestCase.runTest(TestCase.java:176)
	at junit.framework.TestCase.runBare(TestCase.java:141)
	at junit.framework.TestResult$1.protect(TestResult.java:122)
	at junit.framework.TestResult.runProtected(TestResult.java:142)
	at junit.framework.TestResult.run(TestResult.java:125)
	at junit.framework.TestCase.run(TestCase.java:129)
	at junit.extensions.TestDecorator.basicRun(TestDecorator.java:23)
	at junit.extensions.TestSetup$1.protect(TestSetup.java:23)
	at junit.framework.TestResult.runProtected(TestResult.java:142)
	at junit.extensions.TestSetup.run(TestSetup.java:27)
	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:121)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:539)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:761)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:461)
	at org.eclipse.pde.internal.junit.runtime.RemotePluginTestRunner.main(RemotePluginTestRunner.java:181)
	at org.eclipse.pde.internal.junit.runtime.PlatformUITestHarness.lambda$0(PlatformUITestHarness.java:43)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:37)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4497)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4110)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1039)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:151)
	at org.eclipse.pde.internal.junit.runtime.NonUIThreadTestApplication.runApp(NonUIThreadTestApplication.java:52)
	at org.eclipse.pde.internal.junit.runtime.UITestApplication.runApp(UITestApplication.java:43)
	at org.eclipse.pde.internal.junit.runtime.NonUIThreadTestApplication.start(NonUIThreadTestApplication.java:46)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1472)

[khatchad]

I don't think that this is happening anymore. @saledouble could you verify?