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Optimize the code in TypeAliasRegistry #2842

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Optimize the code in TypeAliasRegistry #2842

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11 changes: 7 additions & 4 deletions src/main/java/org/apache/ibatis/type/TypeAliasRegistry.java
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Original file line number Diff line number Diff line change
Expand Up @@ -161,11 +161,14 @@ public void registerAlias(String alias, Class<?> value) {
}
// issue #748
String key = alias.toLowerCase(Locale.ENGLISH);
if (typeAliases.containsKey(key) && typeAliases.get(key) != null && !typeAliases.get(key).equals(value)) {
throw new TypeException(
"The alias '" + alias + "' is already mapped to the value '" + typeAliases.get(key).getName() + "'.");
Class<?> cls = typeAliases.get(key);
if (cls != null) {
if (!cls.equals(value)) {
throw new TypeException("The alias '" + alias + "' is already mapped to the value '" + cls.getName() + "'.");
}
} else {
typeAliases.put(key, value);
}
typeAliases.put(key, value);
}

public void registerAlias(String alias, String value) {
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