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Java example source code file (Dl4jReflection.java)
The Dl4jReflection.java Java example source code/* * * * Copyright 2015 Skymind,Inc. * * * * 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.deeplearning4j.util; import java.lang.reflect.Constructor; import java.lang.reflect.Field; import java.lang.reflect.Modifier; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.Properties; /** * @author Adam Gibson */ public class Dl4jReflection { private Dl4jReflection() {} /** * Gets the empty constructor from a class * @param clazz the class to getFromOrigin the constructor from * @return the empty constructor for the class */ public static Constructor<?> getEmptyConstructor(Class clazz) { Constructor<?> c = clazz.getDeclaredConstructors()[0]; for(int i = 0; i < clazz.getDeclaredConstructors().length; i++) { if(clazz.getDeclaredConstructors()[i].getParameterTypes().length < 1) { c = clazz.getDeclaredConstructors()[i]; break; } } return c; } public static Field[] getAllFields(Class<?> clazz) { // Keep backing up the inheritance hierarchy. Class<?> targetClass = clazz; List<Field> fields = new ArrayList<>(); do { fields.addAll(Arrays.asList(targetClass.getDeclaredFields())); targetClass = targetClass.getSuperclass(); } while (targetClass != null && targetClass != Object.class); return fields.toArray(new Field[fields.size()]); } /** * Sets the properties of the given object * @param obj the object o set * @param props the properties to set */ public static void setProperties(Object obj,Properties props) throws Exception { for (Field field : obj.getClass().getDeclaredFields()) { field.setAccessible(true); if(props.containsKey(field.getName())) { set(field,obj,props.getProperty(field.getName())); } } } /* sets a field with a fairly basic strategy */ private static void set(Field field,Object obj,String value) throws Exception { Class<?> clazz = field.getType(); field.setAccessible(true); if(clazz.equals(Double.class) || clazz.equals(double.class)) { double val = Double.valueOf(value); field.set(obj,val); } else if(clazz.equals(String.class)) { field.set(obj,value); } else if(clazz.equals(Integer.class) || clazz.equals(int.class)) { int val = Integer.parseInt(value); field.set(obj,val); } else if(clazz.equals(Float.class) || clazz.equals(float.class)) { float f = Float.parseFloat(value); field.set(obj,f); } } /** * Get fields as properties * @param obj the object to get fields for * @param clazzes the classes to use for reflection and properties. * T * @return the fields as properties */ public static Properties getFieldsAsProperties(Object obj,Class<?>[] clazzes) throws Exception { Properties props = new Properties(); for (Field field : obj.getClass().getDeclaredFields()) { if(Modifier.isStatic(field.getModifiers())) continue; field.setAccessible(true); Class<?> type = field.getType(); if(clazzes == null || contains(type,clazzes)) { Object val = field.get(obj); if (val != null) props.put(field.getName(), val.toString()); } } return props; } private static boolean contains(Class<?> test,Class[] arr) { for(Class<?> c : arr) if(c.equals(test)) return true; return false; } } Other Java examples (source code examples)Here is a short list of links related to this Java Dl4jReflection.java source code file: |
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