| // *************************************************************************************************************************** |
| // * 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.apache.juneau; |
| |
| import org.apache.juneau.internal.*; |
| |
| /** |
| * Used to convert property values to standardized Boolean/Integer/Class/Object values in property store builders. |
| * |
| * @param <T> The normalized form. |
| */ |
| public interface PropertyConverter<T> { |
| |
| /** |
| * Convert the value to normalized form. |
| * |
| * @param o The raw value. |
| * @return The converted value. |
| */ |
| T convert(Object o); |
| |
| /** |
| * Converts objects to strings. |
| */ |
| static final PropertyConverter<String> STRING_CONVERTER = new PropertyConverter<String>() { |
| @Override |
| public String convert(Object o) { |
| return ClassUtils.toString(o); |
| } |
| }; |
| |
| /** |
| * Converts objects to integers. |
| */ |
| static final PropertyConverter<Integer> INTEGER_CONVERTER = new PropertyConverter<Integer>() { |
| @Override |
| public Integer convert(Object o) { |
| try { |
| if (o instanceof Integer) |
| return (Integer)o; |
| return Integer.valueOf(o.toString()); |
| } catch (Exception e) { |
| throw new ConfigException("Value ''{0}'' ({1}) cannot be converted to an Integer.", o, o.getClass().getSimpleName()); |
| } |
| } |
| }; |
| |
| /** |
| * Converts objects to booleans. |
| */ |
| static final PropertyConverter<Boolean> BOOLEAN_CONVERTER = new PropertyConverter<Boolean>() { |
| @Override |
| public Boolean convert(Object o) { |
| if (o instanceof Boolean) |
| return (Boolean)o; |
| return Boolean.parseBoolean(o.toString()); |
| } |
| }; |
| |
| /** |
| * Converts objects to classes. |
| */ |
| static final PropertyConverter<Class<?>> CLASS_CONVERTER = new PropertyConverter<Class<?>>() { |
| @Override |
| public Class<?> convert(Object o) { |
| try { |
| if (o instanceof Class) |
| return (Class<?>)o; |
| throw new ConfigException("Value ''{0}'' ({1}) cannot be converted to a Class.", o, o.getClass().getSimpleName()); |
| } catch (Exception e) { |
| throw new ConfigException("Value ''{0}'' ({1}) cannot be converted to a Class.", o, o.getClass().getSimpleName()); |
| } |
| } |
| }; |
| |
| /** |
| * Converts objects to objects. |
| */ |
| static final PropertyConverter<Object> OBJECT_CONVERTER = new PropertyConverter<Object>() { |
| @Override |
| public Object convert(Object o) { |
| return o; |
| } |
| }; |
| } |