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JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999. JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python, and many others. These properties make JSON an ideal data-interchange language.
package net.minidev.json;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import net.minidev.asm.FieldFilter;
import net.minidev.json.annotate.JsonIgnore;
/*
* Copyright 2011 JSON-SMART authors
*
* 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.
*/
public class JSONUtil {
@SuppressWarnings({ "unchecked", "rawtypes" })
public static Object convertToStrict(Object obj, Class dest) {
if (obj == null)
return null;
if (dest.isAssignableFrom(obj.getClass()))
return obj;
if (dest.isPrimitive()) {
if (dest == int.class)
if (obj instanceof Number)
return ((Number) obj).intValue();
else
return Integer.valueOf(obj.toString());
else if (dest == short.class)
if (obj instanceof Number)
return ((Number) obj).shortValue();
else
return Short.valueOf(obj.toString());
else if (dest == long.class)
if (obj instanceof Number)
return ((Number) obj).longValue();
else
return Long.valueOf(obj.toString());
else if (dest == byte.class)
if (obj instanceof Number)
return ((Number) obj).byteValue();
else
return Byte.valueOf(obj.toString());
else if (dest == float.class)
if (obj instanceof Number)
return ((Number) obj).floatValue();
else
return Float.valueOf(obj.toString());
else if (dest == double.class)
if (obj instanceof Number)
return ((Number) obj).doubleValue();
else
return Double.valueOf(obj.toString());
else if (dest == char.class) {
String asString = dest.toString();
if (asString.length() > 0)
return Character.valueOf(asString.charAt(0));
} else if (dest == boolean.class) {
return (Boolean) obj;
}
throw new RuntimeException("Primitive: Can not convert " + obj.getClass().getName() + " to "
+ dest.getName());
} else {
if (dest.isEnum())
return Enum.valueOf((Class) dest, obj.toString());
if (dest == Integer.class)
if (obj instanceof Number)
return Integer.valueOf(((Number) obj).intValue());
else
return Integer.valueOf(obj.toString());
if (dest == Long.class)
if (obj instanceof Number)
return Long.valueOf(((Number) obj).longValue());
else
return Long.valueOf(obj.toString());
if (dest == Short.class)
if (obj instanceof Number)
return Short.valueOf(((Number) obj).shortValue());
else
return Short.valueOf(obj.toString());
if (dest == Byte.class)
if (obj instanceof Number)
return Byte.valueOf(((Number) obj).byteValue());
else
return Byte.valueOf(obj.toString());
if (dest == Float.class)
if (obj instanceof Number)
return Float.valueOf(((Number) obj).floatValue());
else
return Float.valueOf(obj.toString());
if (dest == Double.class)
if (obj instanceof Number)
return Double.valueOf(((Number) obj).doubleValue());
else
return Double.valueOf(obj.toString());
if (dest == Character.class) {
String asString = dest.toString();
if (asString.length() > 0)
return Character.valueOf(asString.charAt(0));
}
throw new RuntimeException("Object: Can not Convert " + obj.getClass().getName() + " to " + dest.getName());
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public static Object convertToX(Object obj, Class dest) {
if (obj == null)
return null;
if (dest.isAssignableFrom(obj.getClass()))
return obj;
if (dest.isPrimitive()) {
if (obj instanceof Number)
return obj;
if (dest == int.class)
return Integer.valueOf(obj.toString());
else if (dest == short.class)
return Short.valueOf(obj.toString());
else if (dest == long.class)
return Long.valueOf(obj.toString());
else if (dest == byte.class)
return Byte.valueOf(obj.toString());
else if (dest == float.class)
return Float.valueOf(obj.toString());
else if (dest == double.class)
return Double.valueOf(obj.toString());
else if (dest == char.class) {
String asString = dest.toString();
if (asString.length() > 0)
return Character.valueOf(asString.charAt(0));
} else if (dest == boolean.class) {
return (Boolean) obj;
}
throw new RuntimeException("Primitive: Can not convert " + obj.getClass().getName() + " to "
+ dest.getName());
} else {
if (dest.isEnum())
return Enum.valueOf((Class) dest, obj.toString());
if (dest == Integer.class)
if (obj instanceof Number)
return Integer.valueOf(((Number) obj).intValue());
else
return Integer.valueOf(obj.toString());
if (dest == Long.class)
if (obj instanceof Number)
return Long.valueOf(((Number) obj).longValue());
else
return Long.valueOf(obj.toString());
if (dest == Short.class)
if (obj instanceof Number)
return Short.valueOf(((Number) obj).shortValue());
else
return Short.valueOf(obj.toString());
if (dest == Byte.class)
if (obj instanceof Number)
return Byte.valueOf(((Number) obj).byteValue());
else
return Byte.valueOf(obj.toString());
if (dest == Float.class)
if (obj instanceof Number)
return Float.valueOf(((Number) obj).floatValue());
else
return Float.valueOf(obj.toString());
if (dest == Double.class)
if (obj instanceof Number)
return Double.valueOf(((Number) obj).doubleValue());
else
return Double.valueOf(obj.toString());
if (dest == Character.class) {
String asString = dest.toString();
if (asString.length() > 0)
return Character.valueOf(asString.charAt(0));
}
throw new RuntimeException("Object: Can not Convert " + obj.getClass().getName() + " to " + dest.getName());
}
}
public final static JsonSmartFieldFilter JSON_SMART_FIELD_FILTER = new JsonSmartFieldFilter();
public static class JsonSmartFieldFilter implements FieldFilter {
@Override
public boolean canUse(Field field) {
JsonIgnore ignore = field.getAnnotation(JsonIgnore.class);
if (ignore != null && ignore.value())
return false;
return true;
}
@Override
public boolean canUse(Field field, Method method) {
JsonIgnore ignore = method.getAnnotation(JsonIgnore.class);
if (ignore != null && ignore.value())
return false;
return true;
}
@Override
public boolean canRead(Field field) {
return true;
}
@Override
public boolean canWrite(Field field) {
return true;
}
}
}