package org.apache.ibatis.type;
import org.apache.ibatis.io.Resources;
import java.math.BigDecimal;
import java.util.*;
public class TypeAliasRegistry {
private final HashMap<String, Class> TYPE_ALIASES = new HashMap<String, Class>();
public TypeAliasRegistry() {
registerAlias("string", String.class);
registerAlias("byte", Byte.class);
registerAlias("long", Long.class);
registerAlias("short", Short.class);
registerAlias("int", Integer.class);
registerAlias("integer", Integer.class);
registerAlias("double", Double.class);
registerAlias("float", Float.class);
registerAlias("boolean", Boolean.class);
registerAlias("_byte", byte.class);
registerAlias("_long", long.class);
registerAlias("_short", short.class);
registerAlias("_int", int.class);
registerAlias("_integer", int.class);
registerAlias("_double", double.class);
registerAlias("_float", float.class);
registerAlias("_boolean", boolean.class);
registerAlias("date", Date.class);
registerAlias("decimal", BigDecimal.class);
registerAlias("bigdecimal", BigDecimal.class);
registerAlias("object", Object.class);
registerAlias("map", Map.class);
registerAlias("hashmap", HashMap.class);
registerAlias("list", List.class);
registerAlias("arraylist", ArrayList.class);
registerAlias("collection", Collection.class);
registerAlias("iterator", Iterator.class);
}
public Class resolveAlias(String string) {
try {
if (string == null) return null;
String key = string.toLowerCase();
Class value;
if (TYPE_ALIASES.containsKey(key)) {
value = TYPE_ALIASES.get(key);
} else {
value = Resources.classForName(string);
}
return value;
} catch (ClassNotFoundException e) {
throw new TypeException("Could not resolve type alias '" +string+ "'. Cause: " + e, e);
}
}
public void registerAlias(Class type) {
registerAlias(type.getSimpleName(), type.getName());
}
public void registerAlias(String alias, Class value) {
assert alias != null;
String key = alias.toLowerCase();
if (TYPE_ALIASES.containsKey(key) && !TYPE_ALIASES.get(key).equals(value.getName()) && TYPE_ALIASES.get(alias) != null) {
if (!value.equals(TYPE_ALIASES.get(alias))) {
throw new TypeException("The alias '" + alias + "' is already mapped to the value '" + TYPE_ALIASES.get(alias).getName() + "'.");
}
}
TYPE_ALIASES.put(key, value);
}
public void registerAlias(String alias, String value) {
try {
registerAlias(alias, Resources.classForName(value));
} catch (ClassNotFoundException e) {
throw new TypeException("Error registering type alias "+alias+" for "+value+". Cause: " + e, e);
}
}
}
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