Guava's Iterables.getFirst has the following signature:
static <T> @Nullable T getFirst(Iterable<? extends T> iterable, @Nullable T defaultValue)
When visiting a line of code like this, an error is thrown:
import com.google.common.collect.Iterables
import com.google.common.collect.Multimap
Multimap<String, String> getParams() {
}
def parseString(String string) {
}
def str = parseString(Iterables.getFirst(params.get('key'), (String) null))java.lang.IllegalArgumentException: @Nullable T
at org.eclipse.jdt.core.Signature.createCharArrayTypeSignature(Signature.java:1100)
at org.eclipse.jdt.core.Signature.createTypeSignature(Signature.java:1296)
at org.eclipse.jdt.core.Signature.createTypeSignature(Signature.java:1324)
at org.eclipse.jdt.groovy.core.util.GroovyUtils.getTypeSignatureWithoutGenerics(GroovyUtils.java:287)
at org.codehaus.groovy.eclipse.codebrowsing.requestor.CodeSelectRequestor.findElement(CodeSelectRequestor.java:751)
at org.codehaus.groovy.eclipse.codebrowsing.requestor.CodeSelectRequestor.findRequestedElement(CodeSelectRequestor.java:472)
at org.codehaus.groovy.eclipse.codebrowsing.requestor.CodeSelectRequestor.handleMatch(CodeSelectRequestor.java:252)
at org.codehaus.groovy.eclipse.codebrowsing.requestor.CodeSelectRequestor.acceptASTNode(CodeSelectRequestor.java:136)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.handleRequestor(TypeInferencingVisitorWithRequestor.java:1843)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.handleSimpleExpression(TypeInferencingVisitorWithRequestor.java:1832)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitConstantExpression(TypeInferencingVisitorWithRequestor.java:963)
at org.codehaus.groovy.ast.expr.ConstantExpression.visit(ConstantExpression.java:85)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitMethodCallExpression(TypeInferencingVisitorWithRequestor.java:1377)
at org.codehaus.groovy.ast.expr.MethodCallExpression.visit(MethodCallExpression.java:70)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitListOfExpressions(CodeVisitorSupport.java:327)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitTupleExpression(CodeVisitorSupport.java:231)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitTupleExpression(TypeInferencingVisitorWithRequestor.java:1674)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitArgumentlistExpression(CodeVisitorSupport.java:338)
at org.codehaus.groovy.ast.expr.ArgumentListExpression.visit(ArgumentListExpression.java:76)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitMethodCallExpression(TypeInferencingVisitorWithRequestor.java:1396)
at org.codehaus.groovy.ast.expr.MethodCallExpression.visit(MethodCallExpression.java:70)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitBinaryExpression(TypeInferencingVisitorWithRequestor.java:750)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitDeclarationExpression(CodeVisitorSupport.java:298)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitDeclarationExpression(ClassCodeVisitorSupport.java:150)
at org.codehaus.groovy.ast.expr.DeclarationExpression.visit(DeclarationExpression.java:89)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitExpressionStatement(CodeVisitorSupport.java:122)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitExpressionStatement(ClassCodeVisitorSupport.java:266)
at org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:42)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitBlockStatement(CodeVisitorSupport.java:88)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitBlockStatement(ClassCodeVisitorSupport.java:236)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitBlockStatement(TypeInferencingVisitorWithRequestor.java:822)
at org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:71)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:145)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitConstructorOrMethod(TypeInferencingVisitorWithRequestor.java:1057)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitMethodInternal(TypeInferencingVisitorWithRequestor.java:621)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitJDT(TypeInferencingVisitorWithRequestor.java:459)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitJDT(TypeInferencingVisitorWithRequestor.java:350)
at org.eclipse.jdt.groovy.search.TypeInferencingVisitorWithRequestor.visitCompilationUnit(TypeInferencingVisitorWithRequestor.java:256)
at org.codehaus.groovy.eclipse.codebrowsing.requestor.CodeSelectHelper.select(CodeSelectHelper.java:84)
at org.codehaus.jdt.groovy.model.GroovyCompilationUnit.codeSelect(GroovyCompilationUnit.java:506)
at org.codehaus.jdt.groovy.model.GroovyCompilationUnit.codeSelect(GroovyCompilationUnit.java:499)
at org.codehaus.jdt.groovy.model.GroovyCompilationUnit.codeSelect(GroovyCompilationUnit.java:493)
at org.eclipse.jdt.internal.ui.text.java.hover.AbstractJavaEditorTextHover.getJavaElementsAt(AbstractJavaEditorTextHover.java:124)
at org.eclipse.jdt.internal.ui.text.java.hover.JavaSourceHover.getHoverInfo(JavaSourceHover.java:134)
at org.eclipse.jdt.internal.ui.text.java.hover.JavaSourceHover.getHoverInfo2(JavaSourceHover.java:121)
at org.eclipse.jdt.internal.ui.text.java.hover.BestMatchHover.getHoverInfo2(BestMatchHover.java:167)
at org.eclipse.jdt.internal.ui.text.java.hover.BestMatchHover.getHoverInfo2(BestMatchHover.java:133)
at org.eclipse.jdt.internal.ui.text.java.hover.JavaEditorTextHoverProxy.getHoverInfo2(JavaEditorTextHoverProxy.java:89)
Guava's
Iterables.getFirsthas the following signature:When visiting a line of code like this, an error is thrown: