diff options
author | Anton Tananaev <anton.tananaev@gmail.com> | 2015-11-30 13:55:05 +1300 |
---|---|---|
committer | Anton Tananaev <anton.tananaev@gmail.com> | 2015-11-30 13:55:05 +1300 |
commit | cefc12afe98f610aa0f266bcac4361f9ec414ee5 (patch) | |
tree | 48d47a0eec0c2d8a3ee7f448f8d535d7d826d546 /src/org/traccar/helper/Clazz.java | |
parent | c6692703c8099577cb86c3eace5d8d1bc11f212d (diff) | |
parent | 1a25796d62bdf88f2cba0387a09e2eb71599e588 (diff) | |
download | trackermap-server-cefc12afe98f610aa0f266bcac4361f9ec414ee5.tar.gz trackermap-server-cefc12afe98f610aa0f266bcac4361f9ec414ee5.tar.bz2 trackermap-server-cefc12afe98f610aa0f266bcac4361f9ec414ee5.zip |
Merge master of guterresrafael/traccar into rest
Diffstat (limited to 'src/org/traccar/helper/Clazz.java')
-rw-r--r-- | src/org/traccar/helper/Clazz.java | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/org/traccar/helper/Clazz.java b/src/org/traccar/helper/Clazz.java new file mode 100644 index 000000000..ba4c4fded --- /dev/null +++ b/src/org/traccar/helper/Clazz.java @@ -0,0 +1,108 @@ +/* + * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com) + * + * 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 org.traccar.helper; + +import java.beans.Introspector; +import java.io.Serializable; +import java.lang.reflect.Method; +import java.lang.reflect.ParameterizedType; +import java.lang.reflect.Type; + +public final class Clazz implements Serializable { + + private static final long serialVersionUID = 4983299355055144885L; + + private Clazz() { + } + + public static Class getGenericArgumentType(Class currentClass, Class genericSuperClass) { + return getGenericArgumentType(currentClass, genericSuperClass, 0); + } + + public static Class getGenericArgumentType(Class currentClass, int argumentIndex) { + return getGenericArgumentType(currentClass, null, argumentIndex); + } + + public static Class getGenericArgumentType(Class currentClass) { + return getGenericArgumentType(currentClass, null, 0); + } + + public static Class getGenericArgumentType(Class currentClass, Class genericSuperClass, int argumentIndex) { + Type superType = currentClass.getGenericSuperclass(); + if (superType == null) { + throw new IllegalArgumentException(); + } + if (!(superType instanceof ParameterizedType) + || genericSuperClass != null + && ((ParameterizedType) superType).getRawType() != genericSuperClass) { + return getGenericArgumentType(currentClass.getSuperclass(), genericSuperClass, argumentIndex); + } + Object[] args = ((ParameterizedType) superType).getActualTypeArguments(); + if (argumentIndex >= args.length) { + throw new IllegalArgumentException(); + } + return cast(Class.class, args[argumentIndex]); + } + + public static <T> T newInstance(Class<T> clazz) { + try { + return clazz.newInstance(); + } catch (InstantiationException | IllegalAccessException e) { + throw new IllegalArgumentException(); + } + } + + public static <T> T cast(Class<T> classe, Object objeto) { + if (classe.isAssignableFrom(objeto.getClass())) { + return classe.cast(objeto); + } + throw new ClassCastException(); + } + + public static Class forName(String className) { + try { + return Class.forName(className, false, Thread.currentThread().getContextClassLoader()); + } catch (ClassNotFoundException e) { + throw new IllegalArgumentException(e); + } + } + + public static <T> long getId(T entity) throws Exception { + Method[] methods = entity.getClass().getMethods(); + for (final Method method : methods) { + if (method.getName().startsWith("get") && method.getParameterTypes().length == 0) { + final String name = Introspector.decapitalize(method.getName().substring(3)); + if (name.equals("id")) { + return Long.parseLong(method.invoke(entity).toString()); + } + } + } + throw new IllegalArgumentException(); + } + + public static <T, I> void setId(T entity, I id) throws Exception { + Method[] methods = entity.getClass().getMethods(); + for (final Method method : methods) { + if (method.getName().startsWith("set") && method.getParameterTypes().length == 1) { + final String name = Introspector.decapitalize(method.getName().substring(3)); + if (name.equals("id")) { + method.invoke(entity, id); + break; + } + } + } + } +} |