| /* |
| * 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 javax.faces.component; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import javax.faces.FacesException; |
| import javax.faces.context.FacesContext; |
| import javax.el.ExpressionFactory; |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.lang.reflect.Array; |
| import java.util.*; |
| |
| |
| /** |
| * @author Manfred Geiler (latest modification by $Author$) |
| * @author Anton Koinov |
| * @version $Revision$ $Date$ |
| */ |
| final class _ClassUtils |
| { |
| //~ Static fields/initializers ----------------------------------------------------------------- |
| |
| private static final Log log = LogFactory.getLog(_ClassUtils.class); |
| |
| public static final Class BOOLEAN_ARRAY_CLASS = boolean[].class; |
| public static final Class BYTE_ARRAY_CLASS = byte[].class; |
| public static final Class CHAR_ARRAY_CLASS = char[].class; |
| public static final Class SHORT_ARRAY_CLASS = short[].class; |
| public static final Class INT_ARRAY_CLASS = int[].class; |
| public static final Class LONG_ARRAY_CLASS = long[].class; |
| public static final Class FLOAT_ARRAY_CLASS = float[].class; |
| public static final Class DOUBLE_ARRAY_CLASS = double[].class; |
| public static final Class OBJECT_ARRAY_CLASS = Object[].class; |
| public static final Class BOOLEAN_OBJECT_ARRAY_CLASS = Boolean[].class; |
| public static final Class BYTE_OBJECT_ARRAY_CLASS = Byte[].class; |
| public static final Class CHARACTER_OBJECT_ARRAY_CLASS = Character[].class; |
| public static final Class SHORT_OBJECT_ARRAY_CLASS = Short[].class; |
| public static final Class INTEGER_OBJECT_ARRAY_CLASS = Integer[].class; |
| public static final Class LONG_OBJECT_ARRAY_CLASS = Long[].class; |
| public static final Class FLOAT_OBJECT_ARRAY_CLASS = Float[].class; |
| public static final Class DOUBLE_OBJECT_ARRAY_CLASS = Double[].class; |
| public static final Class STRING_OBJECT_ARRAY_CLASS = String[].class; |
| |
| public static final Map COMMON_TYPES = new HashMap(64); |
| static |
| { |
| COMMON_TYPES.put("byte", Byte.TYPE); |
| COMMON_TYPES.put("char", Character.TYPE); |
| COMMON_TYPES.put("double", Double.TYPE); |
| COMMON_TYPES.put("float", Float.TYPE); |
| COMMON_TYPES.put("int", Integer.TYPE); |
| COMMON_TYPES.put("long", Long.TYPE); |
| COMMON_TYPES.put("short", Short.TYPE); |
| COMMON_TYPES.put("boolean", Boolean.TYPE); |
| COMMON_TYPES.put("void", Void.TYPE); |
| COMMON_TYPES.put("java.lang.Object", Object.class); |
| COMMON_TYPES.put("java.lang.Boolean", Boolean.class); |
| COMMON_TYPES.put("java.lang.Byte", Byte.class); |
| COMMON_TYPES.put("java.lang.Character", Character.class); |
| COMMON_TYPES.put("java.lang.Short", Short.class); |
| COMMON_TYPES.put("java.lang.Integer", Integer.class); |
| COMMON_TYPES.put("java.lang.Long", Long.class); |
| COMMON_TYPES.put("java.lang.Float", Float.class); |
| COMMON_TYPES.put("java.lang.Double", Double.class); |
| COMMON_TYPES.put("java.lang.String", String.class); |
| |
| COMMON_TYPES.put("byte[]", BYTE_ARRAY_CLASS); |
| COMMON_TYPES.put("char[]", CHAR_ARRAY_CLASS); |
| COMMON_TYPES.put("double[]", DOUBLE_ARRAY_CLASS); |
| COMMON_TYPES.put("float[]", FLOAT_ARRAY_CLASS); |
| COMMON_TYPES.put("int[]", INT_ARRAY_CLASS); |
| COMMON_TYPES.put("long[]", LONG_ARRAY_CLASS); |
| COMMON_TYPES.put("short[]", SHORT_ARRAY_CLASS); |
| COMMON_TYPES.put("boolean[]", BOOLEAN_ARRAY_CLASS); |
| COMMON_TYPES.put("java.lang.Object[]", OBJECT_ARRAY_CLASS); |
| COMMON_TYPES.put("java.lang.Boolean[]", BOOLEAN_OBJECT_ARRAY_CLASS); |
| COMMON_TYPES.put("java.lang.Byte[]", BYTE_OBJECT_ARRAY_CLASS); |
| COMMON_TYPES.put("java.lang.Character[]", CHARACTER_OBJECT_ARRAY_CLASS); |
| COMMON_TYPES.put("java.lang.Short[]", SHORT_OBJECT_ARRAY_CLASS); |
| COMMON_TYPES.put("java.lang.Integer[]", INTEGER_OBJECT_ARRAY_CLASS); |
| COMMON_TYPES.put("java.lang.Long[]", LONG_OBJECT_ARRAY_CLASS); |
| COMMON_TYPES.put("java.lang.Float[]", FLOAT_OBJECT_ARRAY_CLASS); |
| COMMON_TYPES.put("java.lang.Double[]", DOUBLE_OBJECT_ARRAY_CLASS); |
| COMMON_TYPES.put("java.lang.String[]", STRING_OBJECT_ARRAY_CLASS); |
| // array of void is not a valid type |
| } |
| |
| /** utility class, do not instantiate */ |
| private _ClassUtils() |
| { |
| // utility class, disable instantiation |
| } |
| |
| //~ Methods ------------------------------------------------------------------------------------ |
| |
| /** |
| * Tries a Class.loadClass with the context class loader of the current thread first and |
| * automatically falls back to the ClassUtils class loader (i.e. the loader of the |
| * myfaces.jar lib) if necessary. |
| * |
| * @param type fully qualified name of a non-primitive non-array class |
| * @return the corresponding Class |
| * @throws NullPointerException if type is null |
| * @throws ClassNotFoundException |
| */ |
| public static Class classForName(String type) |
| throws ClassNotFoundException |
| { |
| if (type == null) throw new NullPointerException("type"); |
| try |
| { |
| // Try WebApp ClassLoader first |
| return Class.forName(type, |
| false, // do not initialize for faster startup |
| Thread.currentThread().getContextClassLoader()); |
| } |
| catch (ClassNotFoundException ignore) |
| { |
| // fallback: Try ClassLoader for ClassUtils (i.e. the myfaces.jar lib) |
| return Class.forName(type, |
| false, // do not initialize for faster startup |
| _ClassUtils.class.getClassLoader()); |
| } |
| } |
| |
| |
| /** |
| * Same as {@link #classForName(String)}, but throws a RuntimeException |
| * (FacesException) instead of a ClassNotFoundException. |
| * |
| * @return the corresponding Class |
| * @throws NullPointerException if type is null |
| * @throws FacesException if class not found |
| */ |
| public static Class simpleClassForName(String type) |
| { |
| try |
| { |
| return classForName(type); |
| } |
| catch (ClassNotFoundException e) |
| { |
| log.error("Class " + type + " not found", e); |
| throw new FacesException(e); |
| } |
| } |
| |
| |
| /** |
| * Similar as {@link #classForName(String)}, but also supports primitive types |
| * and arrays as specified for the JavaType element in the JavaServer Faces Config DTD. |
| * |
| * @param type fully qualified class name or name of a primitive type, both optionally |
| * followed by "[]" to indicate an array type |
| * @return the corresponding Class |
| * @throws NullPointerException if type is null |
| * @throws ClassNotFoundException |
| */ |
| public static Class javaTypeToClass(String type) |
| throws ClassNotFoundException |
| { |
| if (type == null) throw new NullPointerException("type"); |
| |
| // try common types and arrays of common types first |
| Class clazz = (Class) COMMON_TYPES.get(type); |
| if (clazz != null) |
| { |
| return clazz; |
| } |
| |
| int len = type.length(); |
| if (len > 2 && type.charAt(len - 1) == ']' && type.charAt(len - 2) == '[') |
| { |
| String componentType = type.substring(0, len - 2); |
| Class componentTypeClass = classForName(componentType); |
| return Array.newInstance(componentTypeClass, 0).getClass(); |
| } |
| |
| return classForName(type); |
| |
| } |
| |
| |
| /** |
| * Same as {@link #javaTypeToClass(String)}, but throws a RuntimeException |
| * (FacesException) instead of a ClassNotFoundException. |
| * |
| * @return the corresponding Class |
| * @throws NullPointerException if type is null |
| * @throws FacesException if class not found |
| */ |
| public static Class simpleJavaTypeToClass(String type) |
| { |
| try |
| { |
| return javaTypeToClass(type); |
| } |
| catch (ClassNotFoundException e) |
| { |
| log.error("Class " + type + " not found", e); |
| throw new FacesException(e); |
| } |
| } |
| |
| public static InputStream getResourceAsStream(String resource) |
| { |
| InputStream stream = Thread.currentThread().getContextClassLoader() |
| .getResourceAsStream(resource); |
| if (stream == null) |
| { |
| // fallback |
| stream = _ClassUtils.class.getClassLoader().getResourceAsStream(resource); |
| } |
| return stream; |
| } |
| |
| /** |
| * @param resource Name of resource(s) to find in classpath |
| * @param defaultObject The default object to use to determine the class loader (if none associated with current thread.) |
| * @return Iterator over URL Objects |
| */ |
| public static Iterator getResources(String resource, Object defaultObject) |
| { |
| try |
| { |
| Enumeration resources = getCurrentLoader(defaultObject).getResources(resource); |
| List lst = new ArrayList(); |
| while (resources.hasMoreElements()) |
| { |
| lst.add(resources.nextElement()); |
| } |
| return lst.iterator(); |
| } |
| catch (IOException e) |
| { |
| log.error(e.getMessage(), e); |
| throw new FacesException(e); |
| } |
| } |
| |
| |
| public static Object newInstance(String type) |
| throws FacesException |
| { |
| if (type == null) return null; |
| return newInstance(simpleClassForName(type)); |
| } |
| |
| public static Object newInstance(String type, Class expectedType) throws FacesException |
| { |
| return newInstance(type, expectedType == null ? null : new Class[] {expectedType}); |
| } |
| |
| public static Object newInstance(String type, Class[] expectedTypes) |
| { |
| if (type == null) |
| return null; |
| |
| Class clazzForName = simpleClassForName(type); |
| |
| if(expectedTypes != null) |
| { |
| for (int i = 0, size = expectedTypes.length; i < size; i++) |
| { |
| if (!expectedTypes[i].isAssignableFrom(clazzForName)) |
| { |
| throw new FacesException("'" + type + "' does not implement expected type '" + expectedTypes[i] |
| + "'"); |
| } |
| } |
| } |
| |
| return newInstance(clazzForName); |
| } |
| |
| public static Object newInstance(Class clazz) |
| throws FacesException |
| { |
| try |
| { |
| return clazz.newInstance(); |
| } |
| catch(NoClassDefFoundError e) |
| { |
| log.error("Class : "+clazz.getName()+" not found.",e); |
| throw new FacesException(e); |
| } |
| catch (InstantiationException e) |
| { |
| log.error(e.getMessage(), e); |
| throw new FacesException(e); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.error(e.getMessage(), e); |
| throw new FacesException(e); |
| } |
| } |
| |
| public static Object convertToType(Object value, Class desiredClass) |
| { |
| if (value == null) return null; |
| |
| try |
| { |
| ExpressionFactory expFactory = FacesContext.getCurrentInstance().getApplication().getExpressionFactory(); |
| return expFactory.coerceToType(value, desiredClass); |
| } |
| catch (Exception e) |
| { |
| String message = "Cannot coerce " + value.getClass().getName() |
| + " to " + desiredClass.getName(); |
| log.error(message, e); |
| throw new FacesException(message, e); |
| } |
| } |
| |
| /** |
| * Gets the ClassLoader associated with the current thread. Returns the class loader associated with |
| * the specified default object if no context loader is associated with the current thread. |
| * |
| * @param defaultObject The default object to use to determine the class loader (if none associated with current thread.) |
| * @return ClassLoader |
| */ |
| protected static ClassLoader getCurrentLoader(Object defaultObject) |
| { |
| ClassLoader loader = Thread.currentThread().getContextClassLoader(); |
| if(loader == null) |
| { |
| loader = defaultObject.getClass().getClassLoader(); |
| } |
| return loader; |
| } |
| } |