throw NullPointerException when method parameter is null.

[subchen]

模板

${@System.getProperty(null)}
${obj.equals(null)}

结果

Exception in thread "main" java.lang.NullPointerException
    at jetbrick.template.parser.VariableResolver.getPrivateCacheKeyName(VariableResolver.java:495)
    at jetbrick.template.parser.VariableResolver.resolveStaticMethod(VariableResolver.java:463)
    at jetbrick.template.parser.JetTemplateCodeVisitor.visitExpr_static_method_invocation(JetTemplateCodeVisitor.java:1057)
    at jetbrick.template.parser.JetTemplateCodeVisitor.visitExpr_static_method_invocation(JetTemplateCodeVisitor.java:1)
    at jetbrick.template.parser.grammer.JetTemplateParser$Expr_static_method_invocationContext.accept(JetTemplateParser.java:1607)
    at jetbrick.template.parser.JetTemplateCodeVisitor.visitValue(JetTemplateCodeVisitor.java:249)
    at jetbrick.template.parser.JetTemplateCodeVisitor.visitValue(JetTemplateCodeVisitor.java:1)
    at jetbrick.template.parser.grammer.JetTemplateParser$ValueContext.accept(JetTemplateParser.java:288)
    at jetbrick.template.parser.JetTemplateCodeVisitor.visitBlock(JetTemplateCodeVisitor.java:160)
    at jetbrick.template.parser.JetTemplateCodeVisitor.visitBlock(JetTemplateCodeVisitor.java:1)
    at jetbrick.template.parser.grammer.JetTemplateParser$BlockContext.accept(JetTemplateParser.java:153)
    at jetbrick.template.parser.JetTemplateCodeVisitor.visitTemplate(JetTemplateCodeVisitor.java:148)
    at jetbrick.template.parser.JetTemplateCodeVisitor.visitTemplate(JetTemplateCodeVisitor.java:1)
    at jetbrick.template.parser.grammer.JetTemplateParser$TemplateContext.accept(JetTemplateParser.java:103)
    at jetbrick.template.JetTemplate.generateJavaSource(JetTemplate.java:135)
    at jetbrick.template.JetTemplate.compileAndLoadClass(JetTemplate.java:101)
    at jetbrick.template.JetTemplate.<init>(JetTemplate.java:68)
    at jetbrick.template.JetEngine$ConcurrentTemplateCache.doGetValue(JetEngine.java:178)
    at jetbrick.template.JetEngine$ConcurrentTemplateCache.doGetValue(JetEngine.java:1)
    at jetbrick.template.utils.ConcurrentCache.get(ConcurrentCache.java:45)
    at jetbrick.template.JetEngine.getTemplate(JetEngine.java:92)