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NIFI-12341: Fixed typo in expression language guide

This commit is contained in:
Mark Payne 2023-11-09 09:52:34 -05:00
parent 2c89e3a21d
commit 3b6c482db3
1 changed files with 1 additions and 1 deletions
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nifi-docs/src/main/asciidoc/expression-language-guide.adoc
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@ -2215,7 +2215,7 @@ In order to run the correct method, the parameter types must be correct. The Exp
- ${literal(2):toDecimal:math("pow", 2.5)} runs Math.pow(2D,2.5D).
- ${literal(64):toDouble():math("cbrt"):toNumber():math("max", 5)} runs Math.max((Double.valueOf(Math.cbrt(64D))).longValue(), 5L). Note that the toDecimal() is needed because "cbrt" takes a "double" as input and the "64" will get interpreted as a long. The "toDecimal()" call is necessary to correctly call the method. that the "toNumber()" call is necessary because "cbrt" returns a double and the "max" method is must have parameters of the same type and "5" is interpreted as a long.
- ${literal(64):toDecimal():math("cbrt"):toNumber():math("max", 5)} runs Math.max((Double.valueOf(Math.cbrt(64D))).longValue(), 5L). Note that the toDecimal() is needed because "cbrt" takes a "double" as input and the "64" will get interpreted as a long. The "toDecimal()" call is necessary to correctly call the method. that the "toNumber()" call is necessary because "cbrt" returns a double and the "max" method is must have parameters of the same type and "5" is interpreted as a long.
- ${literal(5.4):math("scalb", 2)} runs Math.scalb(5.4, 2). This example is important because NiFi EL treats all whole numbers as "longs" and there is no concept of an "int". "scalb" takes a second parameter of an "int" and it is not overloaded to accept longs so it could not be run without special type handling. In the instance where the Java method cannot be found using parameters of type "double" and "long" the "math()" EL function will attempt to find a Java method with the same name but parameters of "double" and "int".