diff options
Diffstat (limited to 'java/sca/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/DataConverter.java')
| -rw-r--r-- | java/sca/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/DataConverter.java | 378 |
1 files changed, 0 insertions, 378 deletions
diff --git a/java/sca/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/DataConverter.java b/java/sca/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/DataConverter.java deleted file mode 100644 index 35adffe23b..0000000000 --- a/java/sca/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/DataConverter.java +++ /dev/null @@ -1,378 +0,0 @@ -/* - * 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 org.apache.tuscany.sca.databinding.jaxb; - -import java.awt.Image; -import java.io.ByteArrayOutputStream; -import java.io.IOException; -import java.io.InputStream; -import java.lang.reflect.Array; -import java.util.ArrayList; -import java.util.Calendar; -import java.util.Collection; -import java.util.Date; -import java.util.HashMap; -import java.util.HashSet; -import java.util.Hashtable; -import java.util.Iterator; -import java.util.List; -import java.util.Set; - -import javax.activation.DataHandler; -import javax.imageio.ImageIO; -import javax.xml.transform.Result; -import javax.xml.transform.Source; -import javax.xml.transform.Transformer; -import javax.xml.transform.TransformerFactory; -import javax.xml.transform.stream.StreamResult; -import javax.xml.transform.stream.StreamSource; - -import org.oasisopen.sca.ServiceRuntimeException; - -/** - * Provides utilities to convert an object into a different kind of Object. For example, convert a - * String[] into a List<String> - */ -public class DataConverter { - - /** - * This method should return true if the convert method will succeed. - * <p/> - * Note that any changes to isConvertable() must also be accompanied by similar changes to - * convert() - * - * @param obj source object or class - * @param dest destination class - * @return boolean true if convert(..) can convert obj to the destination class - */ - public static boolean isConvertable(Object obj, Class dest) { - Class src = null; - - if (obj != null) { - if (obj instanceof Class) { - src = (Class)obj; - } else { - src = obj.getClass(); - } - } - - if (dest == null) { - return false; - } - - if (src == null) { - return true; - } - - // If we're directly assignable, we're good. - if (dest.isAssignableFrom(src)) { - return true; - } - - // If it's a wrapping conversion, we're good. - if (getWrapperClass(src) == dest) { - return true; - } - if (getWrapperClass(dest) == src) { - return true; - } - - // If it's List -> Array or vice versa, we're good. - if ((Collection.class.isAssignableFrom(src) || src.isArray()) && (Collection.class.isAssignableFrom(dest) || dest - .isArray())) { - - // TODO this should consider the component types instead of returning true. - return true; - } - - // Allow mapping of HashMaps to Hashtables - if (src == HashMap.class && dest == Hashtable.class) - return true; - - // Allow mapping of Calendar to Date - if (Calendar.class.isAssignableFrom(src) && dest == Date.class) { - return true; - } - - if (src.isPrimitive()) { - return isConvertable(getWrapperClass(src), dest); - } - - if (InputStream.class.isAssignableFrom(src) && dest == byte[].class) { - return true; - } - - if (Source.class.isAssignableFrom(src) && dest == byte[].class) { - return true; - } - - if (DataHandler.class.isAssignableFrom(src) && isConvertable(byte[].class, dest)) { - return true; - } - - if (DataHandler.class.isAssignableFrom(src) && dest == Image.class) { - return true; - } - - if (DataHandler.class.isAssignableFrom(src) && dest == Source.class) { - return true; - } - - if (byte[].class.isAssignableFrom(src) && dest == String.class) { - return true; - } - - // If it's a MIME type mapping and we want a DataHandler, - // then we're good. - // REVIEW Do we want to support this - /* - if (dest.getName().equals("javax.activation.DataHandler")) { - String name = src.getName(); - if (src == String.class - || src == java.awt.Image.class - || name.equals("javax.mail.internet.MimeMultipart") - || name.equals("javax.xml.transform.Source")) - return true; - } - */ - - return false; - } - - /** - * Utility function to convert an Object to some desired Class. - * <p/> - * Normally this is used for T[] to List<T> processing. Other conversions are also done (i.e. - * HashMap <->Hashtable, etc.) - * <p/> - * Use the isConvertable() method to determine if conversion is possible. Note that any changes - * to convert() must also be accompanied by similar changes to isConvertable() - * - * @param arg the array to convert - * @param destClass the actual class we want - * @return object of destClass if conversion possible, otherwise returns arg - */ - public static Object convert(Object arg, Class<?> destClass) { - if (destClass == null) { - return arg; - } - - if (arg != null && destClass.isAssignableFrom(arg.getClass())) { - return arg; - } - - // Convert between Calendar and Date - if (arg instanceof Calendar && destClass == Date.class) { - return ((Calendar)arg).getTime(); - } - - // Convert between HashMap and Hashtable - if (arg instanceof HashMap && destClass == Hashtable.class) { - return new Hashtable((HashMap)arg); - } - - if (arg instanceof InputStream && destClass == byte[].class) { - - try { - InputStream is = (InputStream)arg; - return getBytesFromStream(is); - } catch (IOException e) { - throw new ServiceRuntimeException(e); - } - } - - if (arg instanceof Source && destClass == byte[].class) { - try { - if (arg instanceof StreamSource) { - InputStream is = ((StreamSource)arg).getInputStream(); - if (is != null) { - return getBytesFromStream(is); - } - } - ByteArrayOutputStream out = new ByteArrayOutputStream(); - Result result = new StreamResult(out); - Transformer transformer = TransformerFactory.newInstance().newTransformer(); - transformer.transform((Source)arg, result); - byte[] bytes = out.toByteArray(); - return bytes; - - } catch (Exception e) { - throw new ServiceRuntimeException(e); - } - } - - if (arg instanceof DataHandler) { - try { - InputStream is = ((DataHandler)arg).getInputStream(); - if (destClass == Image.class) { - return ImageIO.read(is); - } else if (destClass == Source.class) { - return new StreamSource(is); - } - byte[] bytes = getBytesFromStream(is); - return convert(bytes, destClass); - } catch (Exception e) { - throw new ServiceRuntimeException(e); - } - } - - if (arg instanceof byte[] && destClass == String.class) { - return new String((byte[])arg); - } - - // If the destination is an array and the source - // is a suitable component, return an array with - // the single item. - /* REVIEW do we need to support atomic to array conversion ? - if (arg != null && - destClass.isArray() && - !destClass.getComponentType().equals(Object.class) && - destClass.getComponentType().isAssignableFrom(arg.getClass())) { - Object array = - Array.newInstance(destClass.getComponentType(), 1); - Array.set(array, 0, arg); - return array; - } - */ - - // Return if no conversion is available - if (!(arg instanceof Collection || (arg != null && arg.getClass().isArray()))) { - return arg; - } - - if (arg == null) { - return null; - } - - // The arg may be an array or List - Object destValue = null; - int length = 0; - if (arg.getClass().isArray()) { - length = Array.getLength(arg); - } else { - length = ((Collection)arg).size(); - } - - try { - if (destClass.isArray()) { - if (destClass.getComponentType().isPrimitive()) { - - Object array = Array.newInstance(destClass.getComponentType(), length); - // Assign array elements - if (arg.getClass().isArray()) { - for (int i = 0; i < length; i++) { - Array.set(array, i, Array.get(arg, i)); - } - } else { - int idx = 0; - for (Iterator i = ((Collection)arg).iterator(); i.hasNext();) { - Array.set(array, idx++, i.next()); - } - } - destValue = array; - - } else { - Object[] array; - try { - array = (Object[])Array.newInstance(destClass.getComponentType(), length); - } catch (Exception e) { - return arg; - } - - // Use convert to assign array elements. - if (arg.getClass().isArray()) { - for (int i = 0; i < length; i++) { - array[i] = convert(Array.get(arg, i), destClass.getComponentType()); - } - } else { - int idx = 0; - for (Iterator i = ((Collection)arg).iterator(); i.hasNext();) { - array[idx++] = convert(i.next(), destClass.getComponentType()); - } - } - destValue = array; - } - } else if (Collection.class.isAssignableFrom(destClass)) { - Collection newList = null; - try { - // if we are trying to create an interface, build something - // that implements the interface - if (destClass == Collection.class || destClass == List.class) { - newList = new ArrayList(); - } else if (destClass == Set.class) { - newList = new HashSet(); - } else { - newList = (Collection)destClass.newInstance(); - } - } catch (Exception e) { - // No FFDC code needed - // Couldn't build one for some reason... so forget it. - return arg; - } - - if (arg.getClass().isArray()) { - for (int j = 0; j < length; j++) { - newList.add(Array.get(arg, j)); - } - } else { - for (Iterator j = ((Collection)arg).iterator(); j.hasNext();) { - newList.add(j.next()); - } - } - destValue = newList; - } else { - destValue = arg; - } - } catch (Throwable t) { - throw new ServiceRuntimeException(t); - } - - return destValue; - } - - private static byte[] getBytesFromStream(InputStream is) throws IOException { - // TODO This code assumes that available is the length of the stream. - byte[] bytes = new byte[is.available()]; - is.read(bytes); - return bytes; - } - - public static Class getWrapperClass(Class primitive) { - if (primitive == int.class) { - return java.lang.Integer.class; - } else if (primitive == short.class) { - return java.lang.Short.class; - } else if (primitive == boolean.class) { - return java.lang.Boolean.class; - } else if (primitive == byte.class) { - return java.lang.Byte.class; - } else if (primitive == long.class) { - return java.lang.Long.class; - } else if (primitive == double.class) { - return java.lang.Double.class; - } else if (primitive == float.class) { - return java.lang.Float.class; - } else if (primitive == char.class) { - return java.lang.Character.class; - } - - return null; - } -} |