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Give more helpful error message when an invalid alias is encountered #205

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Give more helpful error message when an invalid alias is encountered #205

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574ef90
Give more helpful error message when an invalid alias is encountered
willmurnane Aug 19, 2016
87947f0
Use Joiner to avoid java8-only methods
Aug 19, 2016
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3 changes: 2 additions & 1 deletion mango-core/src/main/java/org/calrissian/mango/types/TypeRegistry.java
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@
import java.util.LinkedHashMap;
import java.util.Map;

import com.google.common.base.Joiner;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.Iterables.concat;
import static java.util.Arrays.asList;
Expand Down Expand Up @@ -117,7 +118,7 @@ public Object decode(String alias, U value) {
if (encoder != null)
return encoder.decode(value);

throw new TypeDecodingException("An unknown alias [" + value + "] was encountered");
throw new TypeDecodingException("An unknown alias [" + alias + "] was encountered while decoding value [" + value + "]. Valid aliases are " + Joiner.on(", ").join(aliasMapping.keySet()));
}

/**
Expand Down