| /** |
| * 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.cxf.jaxrs.provider; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.Type; |
| import java.util.logging.Logger; |
| |
| import javax.activation.DataHandler; |
| import javax.activation.DataSource; |
| import javax.activation.FileDataSource; |
| import javax.ws.rs.core.MediaType; |
| import javax.ws.rs.core.MultivaluedMap; |
| import javax.ws.rs.ext.MessageBodyReader; |
| import javax.ws.rs.ext.MessageBodyWriter; |
| import javax.ws.rs.ext.Provider; |
| |
| import org.apache.cxf.common.logging.LogUtils; |
| import org.apache.cxf.common.util.StringUtils; |
| import org.apache.cxf.helpers.IOUtils; |
| import org.apache.cxf.jaxrs.ext.multipart.InputStreamDataSource; |
| import org.apache.cxf.jaxrs.utils.ExceptionUtils; |
| import org.apache.cxf.jaxrs.utils.JAXRSUtils; |
| |
| @Provider |
| public class DataSourceProvider<T> implements MessageBodyReader<T>, MessageBodyWriter<T> { |
| protected static final Logger LOG = LogUtils.getL7dLogger(DataSourceProvider.class); |
| private boolean useDataSourceContentType; |
| |
| public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mt) { |
| return isSupported(type); |
| } |
| |
| public T readFrom(Class<T> cls, Type genericType, Annotation[] annotations, |
| MediaType type, |
| MultivaluedMap<String, String> headers, InputStream is) |
| throws IOException { |
| |
| final DataSource ds; |
| if (cls == FileDataSource.class) { |
| File file = new BinaryDataProvider<File>().readFrom(File.class, File.class, annotations, type, headers, is); |
| ds = new FileDataSource(file); |
| } else if (cls == DataSource.class || cls == DataHandler.class) { |
| ds = new InputStreamDataSource(is, type.toString()); |
| } else { |
| LOG.warning("Unsupported DataSource class: " + cls.getName()); |
| throw ExceptionUtils.toWebApplicationException(null, null); |
| } |
| return cls.cast(DataSource.class.isAssignableFrom(cls) ? ds : new DataHandler(ds)); |
| } |
| |
| public long getSize(T t, Class<?> type, Type genericType, Annotation[] annotations, |
| MediaType mt) { |
| return -1; |
| } |
| |
| public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mt) { |
| return isSupported(type); |
| } |
| |
| private static boolean isSupported(Class<?> type) { |
| return DataSource.class.isAssignableFrom(type) || DataHandler.class.isAssignableFrom(type); |
| } |
| |
| public void writeTo(T src, Class<?> cls, Type genericType, Annotation[] annotations, |
| MediaType type, MultivaluedMap<String, Object> headers, OutputStream os) |
| throws IOException { |
| DataSource ds = DataSource.class.isAssignableFrom(cls) |
| ? (DataSource)src : ((DataHandler)src).getDataSource(); |
| if (useDataSourceContentType) { |
| setContentTypeIfNeeded(type, headers, ds.getContentType()); |
| } |
| IOUtils.copyAndCloseInput(ds.getInputStream(), os); |
| } |
| |
| private void setContentTypeIfNeeded(MediaType type, |
| MultivaluedMap<String, Object> headers, String ct) { |
| |
| if (!StringUtils.isEmpty(ct) && !type.equals(JAXRSUtils.toMediaType(ct))) { |
| headers.putSingle("Content-Type", ct); |
| } |
| } |
| |
| public void setUseDataSourceContentType(boolean useDataSourceContentType) { |
| this.useDataSourceContentType = useDataSourceContentType; |
| } |
| |
| |
| } |