com.sun.syndication.feed.synd.SyndFeedImpl Maven / Gradle / Ivy
/*
* Copyright 2004 Sun Microsystems, 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 com.sun.syndication.feed.synd;
import com.sun.syndication.feed.CopyFrom;
import com.sun.syndication.feed.impl.ObjectBean;
import com.sun.syndication.feed.impl.CopyFromHelper;
import com.sun.syndication.feed.WireFeed;
import com.sun.syndication.feed.module.*;
import com.sun.syndication.feed.module.impl.ModuleUtils;
import com.sun.syndication.feed.synd.impl.Converters;
import com.sun.syndication.feed.synd.impl.URINormalizer;
import java.util.*;
import java.io.Serializable;
/**
* Bean for all types of feeds.
*
* It handles all RSS versions, Atom 0.3 and Atom 1.0, it normalizes all info, it may lose information.
*
* @author Alejandro Abdelnur
*
*/
public class SyndFeedImpl implements Serializable, SyndFeed {
private ObjectBean _objBean;
private String _encoding;
private String _uri;
private SyndContent _title;
private SyndContent _description;
private String _feedType;
private String _link;
private List _links;
private SyndImage _image;
private List _entries;
private List _modules;
private List _authors;
private List _contributors;
private List _foreignMarkup;
private WireFeed wireFeed = null;
private boolean preserveWireFeed = false;
private static final Converters CONVERTERS = new Converters();
private static final Set IGNORE_PROPERTIES = new HashSet();
/**
* Unmodifiable Set containing the convenience properties of this class.
*
* Convenience properties are mapped to Modules, for cloning the convenience properties
* can be ignored as the will be copied as part of the module cloning.
*/
public static final Set CONVENIENCE_PROPERTIES = Collections.unmodifiableSet(IGNORE_PROPERTIES);
static {
IGNORE_PROPERTIES.add("publishedDate");
IGNORE_PROPERTIES.add("author");
IGNORE_PROPERTIES.add("copyright");
IGNORE_PROPERTIES.add("categories");
IGNORE_PROPERTIES.add("language");
}
/**
* Returns the real feed types the SyndFeedImpl supports when converting from and to.
*
* @return the real feed type supported.
*/
public List getSupportedFeedTypes() {
return CONVERTERS.getSupportedFeedTypes();
}
/**
* For implementations extending SyndFeedImpl to be able to use the ObjectBean functionality
* with extended interfaces.
*
* @param beanClass
* @param convenienceProperties set containing the convenience properties of the SyndEntryImpl
* (the are ignored during cloning, check CloneableBean for details).
*
*/
protected SyndFeedImpl(Class beanClass,Set convenienceProperties) {
_objBean = new ObjectBean(beanClass,this,convenienceProperties);
}
/**
* Default constructor. All properties are set to null.
*
*
*/
public SyndFeedImpl() {
this(null);
}
/**
* Creates a SyndFeedImpl and populates all its properties out of the
* given RSS Channel or Atom Feed properties.
*
* @param feed the RSS Channel or the Atom Feed to populate the properties from.
*
*/
public SyndFeedImpl(WireFeed feed) {
this(feed, false);
}
/**
* Creates a SyndFeedImpl and populates all its properties out of the
* given RSS Channel or Atom Feed properties, while optionally preserving
* the WireFeed for access via the orignalWireFeed() method.
*
* @param feed
* @param preserveWireFeed
*/
public SyndFeedImpl(WireFeed feed, boolean preserveWireFeed) {
this(SyndFeed.class,IGNORE_PROPERTIES);
if (preserveWireFeed) {
this.wireFeed = feed;
this.preserveWireFeed = preserveWireFeed;
}
if (feed!=null) {
_feedType = feed.getFeedType();
Converter converter = CONVERTERS.getConverter(_feedType);
if (converter==null) {
throw new IllegalArgumentException("Invalid feed type ["+_feedType+"]");
}
converter.copyInto(feed,this);
}
}
/**
* Creates a deep 'bean' clone of the object.
*
* @return a clone of the object.
* @throws CloneNotSupportedException thrown if an element of the object cannot be cloned.
*
*/
public Object clone() throws CloneNotSupportedException {
return _objBean.clone();
}
/**
* Indicates whether some other object is "equal to" this one as defined by the Object equals() method.
*
* @param other he reference object with which to compare.
* @return true if 'this' object is equal to the 'other' object.
*
*/
public boolean equals(Object other) {
if (other == null) {
return false;
}
// can't use foreign markup in equals, due to JDOM equals impl
Object fm = getForeignMarkup();
setForeignMarkup(((SyndFeedImpl)other).getForeignMarkup());
boolean ret = _objBean.equals(other);
// restore foreign markup
setForeignMarkup(fm);
return ret;
}
/**
* Returns a hashcode value for the object.
*
* It follows the contract defined by the Object hashCode() method.
*
* @return the hashcode of the bean object.
*
*/
public int hashCode() {
return _objBean.hashCode();
}
/**
* Returns the String representation for the object.
*
* @return String representation for the object.
*
*/
public String toString() {
return _objBean.toString();
}
/**
* Creates a real feed containing the information of the SyndFeedImpl.
*
* The feed type of the created WireFeed is taken from the SyndFeedImpl feedType property.
*
* @return the real feed.
*
*/
public WireFeed createWireFeed() {
return createWireFeed(_feedType);
}
/**
* Creates a real feed containing the information of the SyndFeedImpl.
*
* @param feedType the feed type for the WireFeed to be created.
* @return the real feed.
*
*/
public WireFeed createWireFeed(String feedType) {
if (feedType==null) {
throw new IllegalArgumentException("Feed type cannot be null");
}
Converter converter = CONVERTERS.getConverter(feedType);
if (converter==null) {
throw new IllegalArgumentException("Invalid feed type ["+feedType+"]");
}
return converter.createRealFeed(this);
}
/**
* Returns the WireFeed this SyndFeed was created from.
* Will return null if the original feed is not stored or if this SyndFeed was not created from a WireFeed.
*
* Note: The wire feed returned here will NOT contain any modifications done on this SyndFeed since it was created.
* That is in contrast to the createWireFeed method, which will reflect the current state of the SyndFeed
*
* @return The WireFeed this was created from, or null
*
*/
public WireFeed originalWireFeed() {
return wireFeed;
}
/**
* Returns the wire feed type the feed had/will-have when coverted from/to a WireFeed.
*
* @return the feed type, null if none.
*
*/
public String getFeedType() {
return _feedType;
}
/**
* Sets the wire feed type the feed will-have when coverted to a WireFeed.
*
* @param feedType the feed type to set, null if none.
*
*/
public void setFeedType(String feedType) {
_feedType = feedType;
}
/**
* Returns the charset encoding of a the feed. This is not set by Rome parsers.
*
* @return the charset encoding of the feed.
*
*/
public String getEncoding() {
return _encoding;
}
/**
* Sets the charset encoding of a the feed. This is not set by Rome parsers.
*
* @param encoding the charset encoding of the feed.
*
*/
public void setEncoding(String encoding) {
_encoding = encoding;
}
/**
* Returns the feed URI.
*
* How the feed URI maps to a concrete feed type (RSS or Atom) depends on
* the concrete feed type. This is explained in detail in Rome documentation,
* Feed and entry URI mapping.
*
* The returned URI is a normalized URI as specified in RFC 2396bis.
*
* Note: The URI is the unique identifier, in the RSS 2.0/atom case this is
* the GUID, for RSS 1.0 this is the URI attribute of the item. The Link
* is the URL that the item is accessible under, the URI is the
* permanent identifier which the aggregator should use to reference
* this item. Often the URI will use some standardized identifier scheme
* such as DOI's so that items can be identified even if they appear in
* multiple feeds with different "links" (they might be on different
* hosting platforms but be the same item). Also, though rare, there
* could be multiple items with the same link but a different URI and
* associated metadata which need to be treated as distinct entities.
* In the RSS 1.0 case the URI must be a valid RDF URI reference.
*
* @return the feed URI, null if none.
*
*/
public String getUri() {
return _uri;
}
/**
* Sets the feed URI.
*
* How the feed URI maps to a concrete feed type (RSS or Atom) depends on
* the concrete feed type. This is explained in detail in Rome documentation,
* Feed and entry URI mapping.
*
* Note: The URI is the unique identifier, in the RSS 2.0/atom case this is
* the GUID, for RSS 1.0 this is the URI attribute of the item. The Link
* is the URL that the item is accessible under, the URI is the
* permanent identifier which the aggregator should use to reference
* this item. Often the URI will use some standardized identifier scheme
* such as DOI's so that items can be identified even if they appear in
* multiple feeds with different "links" (they might be on different
* hosting platforms but be the same item). Also, though rare, there
* could be multiple items with the same link but a different URI and
* associated metadata which need to be treated as distinct entities.
* In the RSS 1.0 case the URI must be a valid RDF URI reference.
*
* @param uri the feed URI to set, null if none.
*
*/
public void setUri(String uri) {
_uri = URINormalizer.normalize(uri);
}
/**
* Returns the feed title.
*
* @return the feed title, null if none.
*
*/
public String getTitle() {
if (_title != null) return _title.getValue();
return null;
}
/**
* Sets the feed title.
*
* @param title the feed title to set, null if none.
*
*/
public void setTitle(String title) {
if (_title == null) _title = new SyndContentImpl();
_title.setValue(title);
}
/**
* Returns the feed title as a text construct.
*
* @return the feed title, null if none.
*
*/
public SyndContent getTitleEx() {
return _title;
}
/**
* Sets the feed title as a text construct.
*
* @param title the feed title to set, null if none.
*
*/
public void setTitleEx(SyndContent title) {
_title = title;
}
/**
* Returns the feed link.
*
* Note: The URI is the unique identifier, in the RSS 2.0/atom case this is
* the GUID, for RSS 1.0 this is the URI attribute of the item. The Link
* is the URL that the item is accessible under, the URI is the
* permanent identifier which the aggregator should use to reference
* this item. Often the URI will use some standardized identifier scheme
* such as DOI's so that items can be identified even if they appear in
* multiple feeds with different "links" (they might be on different
* hosting platforms but be the same item). Also, though rare, there
* could be multiple items with the same link but a different URI and
* associated metadata which need to be treated as distinct entities.
* In the RSS 1.0 case the URI must be a valid RDF URI reference.
*
* @return the feed link, null if none.
*
*/
public String getLink() {
return _link;
}
/**
* Sets the feed link.
*
* Note: The URI is the unique identifier, in the RSS 2.0/atom case this is
* the GUID, for RSS 1.0 this is the URI attribute of the item. The Link
* is the URL that the item is accessible under, the URI is the
* permanent identifier which the aggregator should use to reference
* this item. Often the URI will use some standardized identifier scheme
* such as DOI's so that items can be identified even if they appear in
* multiple feeds with different "links" (they might be on different
* hosting platforms but be the same item). Also, though rare, there
* could be multiple items with the same link but a different URI and
* associated metadata which need to be treated as distinct entities.
* In the RSS 1.0 case the URI must be a valid RDF URI reference.
*
* @param link the feed link to set, null if none.
*
*/
public void setLink(String link) {
_link = link;
}
/**
* Returns the feed description.
*
* @return the feed description, null if none.
*
*/
public String getDescription() {
if (_description != null) return _description.getValue();
return null;
}
/**
* Sets the feed description.
*
* @param description the feed description to set, null if none.
*
*/
public void setDescription(String description) {
if (_description == null) _description = new SyndContentImpl();
_description.setValue(description);
}
/**
* Returns the feed description as a text construct.
*
* @return the feed description, null if none.
*
*/
public SyndContent getDescriptionEx() {
return _description;
}
/**
* Sets the feed description as a text construct.
*
* @param description the feed description to set, null if none.
*
*/
public void setDescriptionEx(SyndContent description) {
_description = description;
}
/**
* Returns the feed published date.
*
* This method is a convenience method, it maps to the Dublin Core module date.
*
* @return the feed published date, null if none.
*
*/
public Date getPublishedDate() {
return getDCModule().getDate();
}
/**
* Sets the feed published date.
*
* This method is a convenience method, it maps to the Dublin Core module date.
*
* @param publishedDate the feed published date to set, null if none.
*
*/
public void setPublishedDate(Date publishedDate) {
getDCModule().setDate(publishedDate);
}
/**
* Returns the feed copyright.
*
* This method is a convenience method, it maps to the Dublin Core module rights.
*
* @return the feed copyright, null if none.
*
*/
public String getCopyright() {
return getDCModule().getRights();
}
/**
* Sets the feed copyright.
*
* This method is a convenience method, it maps to the Dublin Core module rights.
*
* @param copyright the feed copyright to set, null if none.
*
*/
public void setCopyright(String copyright) {
getDCModule().setRights(copyright);
}
/**
* Returns the feed image.
*
* @return the feed image, null if none.
*
*/
public SyndImage getImage() {
return _image;
}
/**
* Sets the feed image.
*
* @param image the feed image to set, null if none.
*
*/
public void setImage(SyndImage image) {
_image = image;
}
/**
* Returns the feed categories.
*
* This method is a convenience method, it maps to the Dublin Core module subjects.
*
* @return a list of SyndCategoryImpl elements with the feed categories,
* an empty list if none.
*
*/
public List getCategories() {
return new SyndCategoryListFacade(getDCModule().getSubjects());
}
/**
* Sets the feed categories.
*
* This method is a convenience method, it maps to the Dublin Core module subjects.
*
* @param categories the list of SyndCategoryImpl elements with the feed categories to set,
* an empty list or null if none.
*
*/
public void setCategories(List categories) {
getDCModule().setSubjects(SyndCategoryListFacade.convertElementsSyndCategoryToSubject(categories));
}
/**
* Returns the feed entries.
*
* @return a list of SyndEntryImpl elements with the feed entries,
* an empty list if none.
*
*/
public List getEntries() {
return (_entries==null) ? (_entries=new ArrayList()) : _entries;
}
/**
* Sets the feed entries.
*
* @param entries the list of SyndEntryImpl elements with the feed entries to set,
* an empty list or null if none.
*
*/
public void setEntries(List entries) {
_entries = entries;
}
/**
* Returns the feed language.
*
* This method is a convenience method, it maps to the Dublin Core module language.
*
* @return the feed language, null if none.
*
*/
public String getLanguage() {
return getDCModule().getLanguage();
}
/**
* Sets the feed language.
*
* This method is a convenience method, it maps to the Dublin Core module language.
*
* @param language the feed language to set, null if none.
*
*/
public void setLanguage(String language) {
getDCModule().setLanguage(language);
}
/**
* Returns the feed modules.
*
* @return a list of ModuleImpl elements with the feed modules,
* an empty list if none.
*
*/
public List getModules() {
if (_modules==null) {
_modules=new ArrayList();
}
if (ModuleUtils.getModule(_modules,DCModule.URI)==null) {
_modules.add(new DCModuleImpl());
}
return _modules;
}
/**
* Sets the feed modules.
*
* @param modules the list of ModuleImpl elements with the feed modules to set,
* an empty list or null if none.
*
*/
public void setModules(List modules) {
_modules = modules;
}
/**
* Returns the module identified by a given URI.
*
* @param uri the URI of the ModuleImpl.
* @return The module with the given URI, null if none.
*/
public Module getModule(String uri) {
return ModuleUtils.getModule(getModules(),uri);
}
/**
* Returns the Dublin Core module of the feed.
* @return the DC module, it's never null
*
*/
private DCModule getDCModule() {
return (DCModule) getModule(DCModule.URI);
}
public Class getInterface() {
return SyndFeed.class;
}
public void copyFrom(CopyFrom obj) {
COPY_FROM_HELPER.copy(this,obj);
}
// TODO We need to find out how to refactor this one in a nice reusable way.
private static final CopyFromHelper COPY_FROM_HELPER;
static {
Map basePropInterfaceMap = new HashMap();
basePropInterfaceMap.put("feedType",String.class);
basePropInterfaceMap.put("encoding",String.class);
basePropInterfaceMap.put("uri",String.class);
basePropInterfaceMap.put("title",String.class);
basePropInterfaceMap.put("link",String.class);
basePropInterfaceMap.put("description",String.class);
basePropInterfaceMap.put("image",SyndImage.class);
basePropInterfaceMap.put("entries",SyndEntry.class);
basePropInterfaceMap.put("modules",Module.class);
Map basePropClassImplMap = new HashMap();
basePropClassImplMap.put(SyndEntry.class,SyndEntryImpl.class);
basePropClassImplMap.put(SyndImage.class,SyndImageImpl.class);
basePropClassImplMap.put(DCModule.class,DCModuleImpl.class);
basePropClassImplMap.put(SyModule.class,SyModuleImpl.class);
COPY_FROM_HELPER = new CopyFromHelper(SyndFeed.class,basePropInterfaceMap,basePropClassImplMap);
}
/**
* Returns the links
*
* @return Returns the links.
*/
public List getLinks() {
return (_links==null) ? (_links=new ArrayList()) : _links;
}
/**
* Set the links
*
* @param links The links to set.
*/
public void setLinks(List links) {
_links = links;
}
public List getAuthors() {
return (_authors==null) ? (_authors=new ArrayList()) : _authors;
}
public void setAuthors(List authors) {
this._authors = authors;
}
/**
* Returns the feed author.
*
* This method is a convenience method, it maps to the Dublin Core module creator.
*
* @return the feed author, null if none.
*
*/
public String getAuthor() {
return getDCModule().getCreator();
}
/**
* Sets the feed author.
*
* This method is a convenience method, it maps to the Dublin Core module creator.
*
* @param author the feed author to set, null if none.
*
*/
public void setAuthor(String author) {
getDCModule().setCreator(author);
}
public List getContributors() {
return (_contributors==null) ? (_contributors=new ArrayList()) : _contributors;
}
public void setContributors(List contributors) {
this._contributors = contributors;
}
/**
* Returns foreign markup found at channel level.
*
* @return Opaque object to discourage use
*
*/
public Object getForeignMarkup() {
return (_foreignMarkup==null) ? (_foreignMarkup=new ArrayList()) : _foreignMarkup;
}
/**
* Sets foreign markup found at channel level.
*
* @param foreignMarkup Opaque object to discourage use
*
*/
public void setForeignMarkup(Object foreignMarkup) {
_foreignMarkup = (List)foreignMarkup;
}
public boolean isPreservingWireFeed() {
return preserveWireFeed;
}
}