/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.codehaus.groovy.runtime.typehandling;
import groovy.lang.GString;
import java.util.Arrays;
/**
* Class providing various short paths for type conversions. Read the comments
* to what conditions have to be met to get valid results!
* Any method here must not depend on the groovy runtime.
*/
public class ShortTypeHandling {
public static Class castToClass(Object object) {
if (object==null) return null;
if (object instanceof Class) return (Class) object;
try {
return Class.forName(object.toString());
} catch (Exception e) {
throw new GroovyCastException(object, Class.class, e);
}
}
public static String castToString(Object object) {
if (object==null) return null;
if (object.getClass().isArray()) {
if (object instanceof boolean[]) return Arrays.toString((boolean[])object);
if (object instanceof byte[]) return Arrays.toString((byte[])object);
if (object instanceof char[]) return new String((char[])object);
if (object instanceof double[]) return Arrays.toString((double[])object);
if (object instanceof float[]) return Arrays.toString((float[])object);
if (object instanceof int[]) return Arrays.toString((int[])object);
if (object instanceof long[]) return Arrays.toString((long[])object);
if (object instanceof short[]) return Arrays.toString((short[])object);
return Arrays.toString((Object[])object);
}
return object.toString();
}
/**
* this class requires that the supplied enum is not fitting a
* Collection case for casting
*/
public static Enum castToEnum(Object object, Class<? extends Enum> type) {
if (object==null) return null;
if (type.isInstance(object)) return (Enum) object;
if (object instanceof String || object instanceof GString) {
return Enum.valueOf(type, object.toString());
}
throw new GroovyCastException(object, type);
}
public static Character castToChar(Object object) {
if (object==null) return null;
if (object instanceof Character) {
return (Character) object;
} else if (object instanceof Number) {
Number value = (Number) object;
return (char) value.intValue();
}
String text = object.toString();
if (text.length() == 1) {
return text.charAt(0);
} else {
throw new GroovyCastException(text,char.class);
}
}
}