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add support for function composition

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This commit is contained in:
markfisher
2017-02-06 15:50:10 -05:00
parent 2075c649a5
commit 0a6dce951b
2 changed files with 17 additions and 2 deletions
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14
spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/InMemoryFunctionCatalog.java
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@@ -22,6 +22,7 @@ import java.util.function.Function;
import java.util.function.Supplier;
import org.springframework.cloud.function.registry.FunctionCatalog;
import org.springframework.util.StringUtils;
/**
* @author Dave Syer
@@ -49,9 +50,18 @@ public class InMemoryFunctionCatalog implements FunctionCatalog {
}
@Override
@SuppressWarnings("unchecked")
@SuppressWarnings({ "unchecked", "rawtypes" })
public <T, R> Function<T, R> lookupFunction(String name) {
return (Function<T, R>) functions.get(name);
if (name.indexOf(',') == -1) {
return (Function<T, R>) functions.get(name);
}
String[] tokens = StringUtils.tokenizeToStringArray(name, ",");
Function function = null;
for (String token : tokens) {
Function next = lookupFunction(token);
function = (function == null) ? next : function.andThen(next);
}
return function;
}
@Override