How to obtain the class and inheritance tree of..

"Alain Ravet" <alain.ravet.list@wanadoo.be> wrote in message
news:bm198v$d0v$1@is.intellij.net...
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Sorry, newbie question, but I'm stuck:

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Given a psiElement (PsiVariable, PsiField, PsiMethod, PsiClass) linked
to a typed java "thing" (variable, field, constant, method), how can I

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- obtain the class of the "thing"
- obtain the inheritance tree of the "thing" class

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Example 1:
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    MyLogger log = ...;
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Given 'log', I must assert that its class 'MyLogger' extends

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org.apache.log4j.Logger

boolean InheritanceUtil.isInheritor(PsiClass candidateClass, PsiClass
baseClass, boolean checkDeep) {

or

boolean PsiType.isAssignableFrom(PsiType type)

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Example 2:
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         if (l.isDebugEnabled()) ...
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Given 'isDebugEnabled()', I must assert that it is, or extends :

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org.apache.log4j.Category.isDebugEnabled()

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PsiMethod[] PsiSuperMethodUtil.findSuperMethods(PsiMethod method)

or better InheritanceUtil.isInhertior(((PsiClassType)l.getType()).resolve(),
PsiManager.getInstance(xxx).findClass("org.apache.log4j.Category"), true)
with all necessary checks for nulls.

Thanks Maxim