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Apache CXF example source code file (AtomPojoProviderTest.java)

This example Apache CXF source code file (AtomPojoProviderTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

annotation, annotation, atompojoprovider, book, book, books, books, bytearrayinputstream, bytearrayoutputstream, exception, exception, io, list, string, string, test, util

The Apache CXF AtomPojoProviderTest.java source code

/**
 * 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.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.StringReader;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.List;

import javax.ws.rs.core.MediaType;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlRootElement;

import org.apache.abdera.model.Entry;
import org.apache.abdera.model.Feed;
import org.apache.cxf.jaxrs.ext.atom.AbstractEntryBuilder;
import org.apache.cxf.jaxrs.ext.atom.AbstractFeedBuilder;
import org.apache.cxf.jaxrs.ext.atom.AtomElementReader;
import org.apache.cxf.jaxrs.ext.atom.AtomElementWriter;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class AtomPojoProviderTest extends Assert {

    private ClassPathXmlApplicationContext ctx;
    
    @Before
    public void setUp() {
        ctx = 
            new ClassPathXmlApplicationContext(new String[] {"/org/apache/cxf/jaxrs/provider/servers.xml"});
    }
    
    @Test
    public void testWriteFeedWithBuilders() throws Exception {
        AtomPojoProvider provider = (AtomPojoProvider)ctx.getBean("atom");
        assertNotNull(provider);
        provider.setFormattedOutput(true);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        
        Books books = new Books();
        List<Book> bs = new ArrayList();
        bs.add(new Book("a"));
        bs.add(new Book("b"));
        books.setBooks(bs);
        provider.writeTo(books, Books.class, Books.class, new Annotation[]{},
                         MediaType.valueOf("application/atom+xml"), null, bos);
        ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
        Feed feed = new AtomFeedProvider().readFrom(Feed.class, null, null, null, null, bis);
        assertEquals("Books", feed.getTitle()); 
        List<Entry> entries = feed.getEntries();
        assertEquals(2, entries.size());
        verifyEntry(getEntry(entries, "a"), "a");
        verifyEntry(getEntry(entries, "b"), "b");
    }
    
    @Test
    public void testWriteEntryWithBuilders() throws Exception {
        AtomPojoProvider provider = (AtomPojoProvider)ctx.getBean("atom2");
        assertNotNull(provider);
        provider.setFormattedOutput(true);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        provider.writeTo(new Book("a"), Book.class, Book.class, new Annotation[]{},
                         MediaType.valueOf("application/atom+xml;type=entry"), null, bos);
        ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
        Entry entry = new AtomEntryProvider().readFrom(Entry.class, null, null, null, null, bis);
        verifyEntry(entry, "a");
        
    }
    
    @Test
    public void testReadEntryWithBuilders() throws Exception {
        AtomPojoProvider provider = (AtomPojoProvider)ctx.getBean("atom3");
        assertNotNull(provider);
        doTestReadEntry(provider);
    }
    
    @Test
    public void testReadEntryWithoutBuilders() throws Exception {
        doTestReadEntry(new AtomPojoProvider());
    }
    
    @SuppressWarnings("unchecked")
    private void doTestReadEntry(AtomPojoProvider provider) throws Exception {
        provider.setFormattedOutput(true);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        MediaType mt = MediaType.valueOf("application/atom+xml;type=entry");
        provider.writeTo(new Book("a"), Book.class, Book.class, new Annotation[]{}, mt, null, bos);
        //System.out.println(bos.toString());
        ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
        Book book = (Book)provider.readFrom((Class)Book.class, Book.class, 
                                            new Annotation[]{}, mt, null, bis);
        assertEquals("a", book.getName());
    }
    
    
    @Test
    public void testReadFeedWithBuilders() throws Exception {
        AtomPojoProvider provider = (AtomPojoProvider)ctx.getBean("atom4");
        assertNotNull(provider);
        doTestReadFeed(provider);
    }
    
    @Test
    public void testReadFeedWithoutBuilders() throws Exception {
        AtomPojoProvider provider = new AtomPojoProvider();
        doTestReadFeed(provider);
    }

    @SuppressWarnings("unchecked")
    private void doTestReadFeed(AtomPojoProvider provider) throws Exception {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        MediaType mt = MediaType.valueOf("application/atom+xml;type=feed");
        Books books = new Books();
        List<Book> bs = new ArrayList();
        bs.add(new Book("a"));
        bs.add(new Book("b"));
        books.setBooks(bs);
        provider.writeTo(books, Books.class, Books.class, new Annotation[]{}, mt, null, bos);
        ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
        Books books2 = (Books)provider.readFrom((Class)Books.class, Books.class, 
                                            new Annotation[]{}, mt, null, bis);
        List<Book> list = books2.getBooks();
        assertEquals(2, list.size());
        assertTrue("a".equals(list.get(0).getName()) || "a".equals(list.get(1).getName()));
        assertTrue("b".equals(list.get(0).getName()) || "b".equals(list.get(1).getName()));        
    }
        
    private Entry getEntry(List<Entry> entries, String title) {
        for (Entry e : entries) {
            if (title.equals(e.getTitle())) {
                return e;
            }
        }
        return null;
    }
    
    private void verifyEntry(Entry e, String title) {
        assertNotNull(e);
        assertEquals(title, e.getTitle());
    }
 
    public static class CustomFeedWriter implements AtomElementWriter<Feed, Books> {

        public void writeTo(Feed feed, Books pojoFeed) {
            feed.setTitle("Books");
        }
        
    }
    
    public static class CustomEntryWriter implements AtomElementWriter<Entry, Book> {

        public void writeTo(Entry entry, Book pojoEntry) {
            entry.setTitle(pojoEntry.getName());
        }
        
    }
    
    public static class CustomEntryReader implements AtomElementReader<Entry, Book> {

        public Book readFrom(Entry element) {
            try {
                String s = element.getContent();
                                
                Unmarshaller um = 
                    new JAXBElementProvider().getJAXBContext(Book.class, Book.class).createUnmarshaller();
                return (Book)um.unmarshal(new StringReader(s));
            } catch (Exception ex) {
                // ignore
            }
            return null;
        }
        
    }
    
    public static class CustomFeedReader implements AtomElementReader<Feed, Books> {

        public Books readFrom(Feed element) {
            Books books = new Books();
            List<Book> list = new ArrayList();
            CustomEntryReader entryReader = new CustomEntryReader();
            for (Entry e : element.getEntries()) {
                list.add(entryReader.readFrom(e));
            }
            books.setBooks(list);
            return books;
        }
        
    }
    
    public static class CustomFeedBuilder extends AbstractFeedBuilder<Books> {
        @Override
        public String getBaseUri(Books books) {
            return "http://books";
        }
    }
    
    public static class CustomEntryBuilder extends AbstractEntryBuilder<Book> {
        @Override
        public String getBaseUri(Book books) {
            return "http://book";
        }
    }
    
        
    @XmlRootElement
    public static class Book {
        private String name = "Book";

        public Book() {
            
        }
        
        public Book(String name) {
            this.name = name;
        }
        
        public void setName(String name) {
            this.name = name;
        }

        public String getName() {
            return name;
        }
        
        
    }
    
    @XmlRootElement
    public static class Books {
        
        private List<Book> books;
        
        public Books() {
            
        }
        
        public List<Book> getBooks() {
            return books;
        }
        
        public void setBooks(List<Book> list) {
            books = list;
        }
    }
}

Other Apache CXF examples (source code examples)

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