jetbrick.web.mvc.action.annotations.ValueConstants Maven / Gradle / Ivy
/**
* Copyright 2013-2014 Guoqiang Chen, Shanghai, China. All rights reserved.
*
* Email: [email protected]
* URL: http://subchen.github.io/
*
* Licensed 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 jetbrick.web.mvc.action.annotations;
public class ValueConstants {
public static final boolean SINGLETONE = true;
public static final boolean REQUIRED = true;
public static final String EMPTY = "";
public static final String NULL = "\0\1\2";
public static boolean isEmpty(String value) {
return value == null || value.length() == 0;
}
public static boolean isNull(String value) {
return value == null || NULL.equals(value);
}
public static String defaultValue(String value, String defaultValue) {
if (value == null || value.length() == 0 || NULL.equals(value)) {
return defaultValue;
}
return value;
}
public static String defaultIfEmpty(String value, String defaultValue) {
if (value == null || value.length() == 0) {
return defaultValue;
}
return value;
}
public static String defaultIfNull(String value, String defaultValue) {
if (value == null || NULL.equals(value)) {
return defaultValue;
}
return value;
}
public static String defaultIfNull(String value) {
if (NULL.equals(value)) {
return null;
}
return value;
}
}