src/main/java/org/apache/sling/sitemap/impl/builder/extensions/GoogleVideoExtensionProvider.java - sling-org-apache-sling-sitemap - Git at Google

 /*
  * 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.sling.sitemap.impl.builder.extensions;

 import org.apache.sling.sitemap.builder.extensions.GoogleVideoExtension;
 import org.apache.sling.sitemap.spi.builder.AbstractExtension;
 import org.apache.sling.sitemap.spi.builder.SitemapExtensionProvider;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.osgi.service.component.annotations.Component;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 import javax.xml.stream.XMLStreamException;
 import javax.xml.stream.XMLStreamWriter;
 import java.time.LocalDate;
 import java.time.OffsetDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.temporal.TemporalAccessor;
 import java.util.*;
 import java.util.stream.Collectors;

 @Component(
         property = {
                 SitemapExtensionProvider.PROPERTY_INTERFACE + "=org.apache.sling.sitemap.builder.extensions.GoogleVideoExtension",
                 SitemapExtensionProvider.PROPERTY_PREFIX + "=video",
                 SitemapExtensionProvider.PROPERTY_NAMESPACE + "=http://www.google.com/schemas/sitemap-video/1.1",
                 SitemapExtensionProvider.PROPERTY_LOCAL_NAME + "=video"
         }
 )
 public class GoogleVideoExtensionProvider implements SitemapExtensionProvider {

     private static final Logger LOG = LoggerFactory.getLogger(GoogleVideoExtensionProvider.class);

     @Override
     @NotNull
     public AbstractExtension newInstance() {
         return new ExtensionImpl();
     }

     private static class PriceImpl {
         private String currency;
         private String type;
         private String resolution;
         private String price;
     }

     private static class ExtensionImpl extends AbstractExtension implements GoogleVideoExtension {

         private String thumbnailLocation;
         private String title;
         private String description;
         private String contentLocation;
         private String playerLocation;
         private String duration;
         private TemporalAccessor expirationDate;
         private String rating;
         private String viewCount;
         private TemporalAccessor publicationDate;
         private List<String> tags;
         private String category;
         private String familyFriendly;
         private String accessRestrictions;
         private String accessRestrictionsRel;
         private String platformRestrictions;
         private String platformRestrictionsRel;
         private Collection<PriceImpl> prices;
         private String requiresSubscription;
         private String uploader;
         private String uploaderInfo;
         private String live;

         private static String booleanToString(Boolean bool) {
             if (bool != null) {
                 return bool ? "yes" : "no";
             } else {
                 return null;
             }
         }

         private static String required(String object, String message) throws XMLStreamException {
             if (object == null) {
                 throw new XMLStreamException(message);
             }
             return object;
         }

         private static void write(XMLStreamWriter writer, String value, String tag) throws XMLStreamException {
             writer.writeStartElement(tag);
             writer.writeCharacters(value);
             writer.writeEndElement();
         }

         private static void write(XMLStreamWriter writer, TemporalAccessor date, String tag) throws XMLStreamException {
             try {
                 if (date instanceof LocalDate) {
                     write(writer, DateTimeFormatter.ISO_LOCAL_DATE.format(date), tag);
                 } else {
                     write(writer, DateTimeFormatter.ISO_OFFSET_DATE_TIME.format(date), tag);
                 }
             } catch (RuntimeException ex) {
                 throw new XMLStreamException("failed to write " + tag, ex);
             }
         }

         private static void writeCond(XMLStreamWriter writer, String value, String tag) throws XMLStreamException {
             if (value != null) {
                 write(writer, value, tag);
             }
         }

         private static void writeCond(XMLStreamWriter writer, TemporalAccessor value, String tag) throws XMLStreamException {
             if (value != null) {
                 write(writer, value, tag);
             }
         }

         private static void writeReq(XMLStreamWriter writer, String value, String tag, String msg) throws XMLStreamException {
             write(writer, required(value, msg), tag);
         }

         @Override
         @NotNull
         public GoogleVideoExtension setThumbnail(@NotNull String thumbnailLocation) {
             this.thumbnailLocation = thumbnailLocation;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setTitle(@NotNull String title) {
             this.title = title;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setDescription(@NotNull String description) {
             this.description = description;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setUrl(String contentLocation) {
             this.contentLocation = contentLocation;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setPlayerUrl(String playerLocation) {
             this.playerLocation = playerLocation;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setDuration(Integer duration) {
             if (duration != null) {
                 if (duration < 0 || duration > 28800) {
                     LOG.warn("Adjusting duration as it is out of bounds (0, 28800): {}", duration);
                     duration = Math.max(0, Math.min(duration, 28800));
                 }
                 this.duration = String.valueOf(duration);
             } else {
                 this.duration = null;
             }
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setExpirationDate(LocalDate date) {
             this.expirationDate = date;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setExpirationDate(OffsetDateTime date) {
             this.expirationDate = date;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setRating(Float rating) {
             if (rating != null) {
                 if (rating < 0 || rating > 5) {
                     LOG.warn("Adjusting rating as it is out of bounds (0,5): {}", rating);
                     rating = Math.max(0.0f, Math.min(rating, 5.0f));
                 }
                 this.rating = String.valueOf(rating);
             } else {
                 this.rating = null;
             }
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setViewCount(Integer viewCount) {
             if (viewCount != null) {
                 if (viewCount < 0) {
                     LOG.warn("Adjusting negative view count: {}", viewCount);
                     viewCount = 0;
                 }
                 this.viewCount = String.valueOf(viewCount);
             } else {
                 this.viewCount = null;
             }
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setPublicationDate(LocalDate date) {
             this.publicationDate = date;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setPublicationDate(OffsetDateTime date) {
             this.publicationDate = date;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setTags(Collection<String> tags) {
             this.tags = new ArrayList<>(tags);
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setCategory(String category) {
             this.category = category;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setFamilyFriendly(Boolean familyFriendly) {
             this.familyFriendly = booleanToString(familyFriendly);
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setAccessRestriction(@Nullable Access restriction, @Nullable Collection<String> countryCodes) {
             String accessRestrictionsCorrected = countryCodes != null
                     ? countryCodes.stream()
                     .map(countryCode -> countryCode.toUpperCase(Locale.ROOT))
                     .filter(countryCode -> countryCode.length() == 2)
                     .collect(Collectors.joining(" "))
                     : null;
             if (restriction != null && accessRestrictionsCorrected != null && accessRestrictionsCorrected.length() > 0) {
                 this.accessRestrictions = accessRestrictionsCorrected;
                 this.accessRestrictionsRel = restriction.getValue();
             } else {
                 this.accessRestrictions = null;
                 this.accessRestrictionsRel = null;
             }
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setPlatformRestriction(@Nullable Access restriction, @Nullable Collection<Platform> platforms) {
             if (restriction != null && platforms != null) {
                 this.platformRestrictions = platforms.stream().map(Platform::getValue).collect(Collectors.joining(" "));
                 this.platformRestrictionsRel = restriction.getValue();
             } else {
                 this.platformRestrictions = null;
                 this.platformRestrictionsRel = null;
             }
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension addPrice(float price, @NotNull String currency, @Nullable PriceType type, @Nullable Resolution resolution) {
             if (prices == null) {
                 this.prices = new ArrayList<>();
             }
             PriceImpl newPrice = new PriceImpl();
             newPrice.price = String.valueOf(price);
             newPrice.currency = currency;
             newPrice.type = type != null ? type.getValue() : null;
             newPrice.resolution = resolution != null ? resolution.getValue() : null;
             prices.add(newPrice);
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setRequiresSubscription(Boolean requiresSubscription) {
             this.requiresSubscription = booleanToString(requiresSubscription);
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setUploader(String uploader) {
             this.uploader = uploader;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setUploaderUrl(String uploaderInfo) {
             this.uploaderInfo = uploaderInfo;
             return this;
         }

         @Override
         @NotNull
         public GoogleVideoExtension setLive(Boolean live) {
             this.live = booleanToString(live);
             return this;
         }

         @Override
         public void writeTo(@NotNull XMLStreamWriter writer) throws XMLStreamException {
             writeReq(writer, thumbnailLocation, "thumbnail_loc", "thumbnail location missing");
             writeReq(writer, title, "title", "title missing");
             writeReq(writer, description, "description", "description missing");

             if (contentLocation == null && playerLocation == null) {
                 throw new XMLStreamException("either content location or player location is required");
             } else if (contentLocation != null) {
                 write(writer, contentLocation, "content_loc");
             } else {
                 write(writer, playerLocation, "player_loc");
             }

             writeCond(writer, duration, "duration");
             writeCond(writer, expirationDate, "expiration_date");
             writeCond(writer, rating, "rating");
             writeCond(writer, viewCount, "view_count");
             writeCond(writer, publicationDate, "publication_date");
             writeTags(writer);
             writeCond(writer, category, "category");
             writeCond(writer, familyFriendly, "family_friendly");
             writeRestriction(writer, accessRestrictions, accessRestrictionsRel, "restriction");
             writePrices(writer);
             writeCond(writer, requiresSubscription, "requires_subscription");
             writeUploader(writer);
             writeRestriction(writer, platformRestrictions, platformRestrictionsRel, "platform");
             writeCond(writer, live, "live");
         }

         private void writeTags(XMLStreamWriter writer) throws XMLStreamException {
             if (tags != null) {
                 if (tags.size() > 32) {
                     LOG.warn("Truncating tags as more then 32 were given: {}", tags.size());
                 }
                 for (String tag : tags.subList(0, Math.min(tags.size(), 32))) {
                     writer.writeStartElement("tag");
                     writer.writeCharacters(tag);
                     writer.writeEndElement();
                 }
             }
         }

         private void writePrices(XMLStreamWriter writer) throws XMLStreamException {
             if (prices != null) {
                 for (PriceImpl price : prices) {
                     writer.writeStartElement("price");
                     writer.writeAttribute("currency", price.currency);
                     if (price.type != null) {
                         writer.writeAttribute("type", price.type);
                     }
                     if (price.resolution != null) {
                         writer.writeAttribute("resolution", price.resolution);
                     }
                     writer.writeCharacters(price.price);
                     writer.writeEndElement();
                 }
             }
         }

         private void writeUploader(XMLStreamWriter writer) throws XMLStreamException {
             if (uploader != null) {
                 writer.writeStartElement("uploader");
                 if (uploaderInfo != null) {
                     writer.writeAttribute("info", uploaderInfo);
                 }
                 writer.writeCharacters(uploader);
                 writer.writeEndElement();
             }
         }

         private static void writeRestriction(XMLStreamWriter writer, String value, String rel, String tag) throws XMLStreamException {
             if (value != null) {
                 writer.writeStartElement(tag);
                 writer.writeAttribute("relationship", rel);
                 writer.writeCharacters(value);
                 writer.writeEndElement();
             }
         }
     }
 }
	/*
	* 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.sling.sitemap.impl.builder.extensions;

	import org.apache.sling.sitemap.builder.extensions.GoogleVideoExtension;
	import org.apache.sling.sitemap.spi.builder.AbstractExtension;
	import org.apache.sling.sitemap.spi.builder.SitemapExtensionProvider;
	import org.jetbrains.annotations.NotNull;
	import org.jetbrains.annotations.Nullable;
	import org.osgi.service.component.annotations.Component;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

	import javax.xml.stream.XMLStreamException;
	import javax.xml.stream.XMLStreamWriter;
	import java.time.LocalDate;
	import java.time.OffsetDateTime;
	import java.time.format.DateTimeFormatter;
	import java.time.temporal.TemporalAccessor;
	import java.util.*;
	import java.util.stream.Collectors;

	@Component(
	property = {
	SitemapExtensionProvider.PROPERTY_INTERFACE + "=org.apache.sling.sitemap.builder.extensions.GoogleVideoExtension",
	SitemapExtensionProvider.PROPERTY_PREFIX + "=video",
	SitemapExtensionProvider.PROPERTY_NAMESPACE + "=http://www.google.com/schemas/sitemap-video/1.1",
	SitemapExtensionProvider.PROPERTY_LOCAL_NAME + "=video"
	}
	)
	public class GoogleVideoExtensionProvider implements SitemapExtensionProvider {

	private static final Logger LOG = LoggerFactory.getLogger(GoogleVideoExtensionProvider.class);

	@Override
	@NotNull
	public AbstractExtension newInstance() {
	return new ExtensionImpl();
	}

	private static class PriceImpl {
	private String currency;
	private String type;
	private String resolution;
	private String price;
	}

	private static class ExtensionImpl extends AbstractExtension implements GoogleVideoExtension {

	private String thumbnailLocation;
	private String title;
	private String description;
	private String contentLocation;
	private String playerLocation;
	private String duration;
	private TemporalAccessor expirationDate;
	private String rating;
	private String viewCount;
	private TemporalAccessor publicationDate;
	private List<String> tags;
	private String category;
	private String familyFriendly;
	private String accessRestrictions;
	private String accessRestrictionsRel;
	private String platformRestrictions;
	private String platformRestrictionsRel;
	private Collection<PriceImpl> prices;
	private String requiresSubscription;
	private String uploader;
	private String uploaderInfo;
	private String live;

	private static String booleanToString(Boolean bool) {
	if (bool != null) {
	return bool ? "yes" : "no";
	} else {
	return null;
	}
	}

	private static String required(String object, String message) throws XMLStreamException {
	if (object == null) {
	throw new XMLStreamException(message);
	}
	return object;
	}

	private static void write(XMLStreamWriter writer, String value, String tag) throws XMLStreamException {
	writer.writeStartElement(tag);
	writer.writeCharacters(value);
	writer.writeEndElement();
	}

	private static void write(XMLStreamWriter writer, TemporalAccessor date, String tag) throws XMLStreamException {
	try {
	if (date instanceof LocalDate) {
	write(writer, DateTimeFormatter.ISO_LOCAL_DATE.format(date), tag);
	} else {
	write(writer, DateTimeFormatter.ISO_OFFSET_DATE_TIME.format(date), tag);
	}
	} catch (RuntimeException ex) {
	throw new XMLStreamException("failed to write " + tag, ex);
	}
	}

	private static void writeCond(XMLStreamWriter writer, String value, String tag) throws XMLStreamException {
	if (value != null) {
	write(writer, value, tag);
	}
	}

	private static void writeCond(XMLStreamWriter writer, TemporalAccessor value, String tag) throws XMLStreamException {
	if (value != null) {
	write(writer, value, tag);
	}
	}

	private static void writeReq(XMLStreamWriter writer, String value, String tag, String msg) throws XMLStreamException {
	write(writer, required(value, msg), tag);
	}

	@Override
	@NotNull
	public GoogleVideoExtension setThumbnail(@NotNull String thumbnailLocation) {
	this.thumbnailLocation = thumbnailLocation;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setTitle(@NotNull String title) {
	this.title = title;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setDescription(@NotNull String description) {
	this.description = description;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setUrl(String contentLocation) {
	this.contentLocation = contentLocation;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setPlayerUrl(String playerLocation) {
	this.playerLocation = playerLocation;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setDuration(Integer duration) {
	if (duration != null) {
	if (duration < 0 \|\| duration > 28800) {
	LOG.warn("Adjusting duration as it is out of bounds (0, 28800): {}", duration);
	duration = Math.max(0, Math.min(duration, 28800));
	}
	this.duration = String.valueOf(duration);
	} else {
	this.duration = null;
	}
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setExpirationDate(LocalDate date) {
	this.expirationDate = date;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setExpirationDate(OffsetDateTime date) {
	this.expirationDate = date;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setRating(Float rating) {
	if (rating != null) {
	if (rating < 0 \|\| rating > 5) {
	LOG.warn("Adjusting rating as it is out of bounds (0,5): {}", rating);
	rating = Math.max(0.0f, Math.min(rating, 5.0f));
	}
	this.rating = String.valueOf(rating);
	} else {
	this.rating = null;
	}
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setViewCount(Integer viewCount) {
	if (viewCount != null) {
	if (viewCount < 0) {
	LOG.warn("Adjusting negative view count: {}", viewCount);
	viewCount = 0;
	}
	this.viewCount = String.valueOf(viewCount);
	} else {
	this.viewCount = null;
	}
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setPublicationDate(LocalDate date) {
	this.publicationDate = date;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setPublicationDate(OffsetDateTime date) {
	this.publicationDate = date;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setTags(Collection<String> tags) {
	this.tags = new ArrayList<>(tags);
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setCategory(String category) {
	this.category = category;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setFamilyFriendly(Boolean familyFriendly) {
	this.familyFriendly = booleanToString(familyFriendly);
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setAccessRestriction(@Nullable Access restriction, @Nullable Collection<String> countryCodes) {
	String accessRestrictionsCorrected = countryCodes != null
	? countryCodes.stream()
	.map(countryCode -> countryCode.toUpperCase(Locale.ROOT))
	.filter(countryCode -> countryCode.length() == 2)
	.collect(Collectors.joining(" "))
	: null;
	if (restriction != null && accessRestrictionsCorrected != null && accessRestrictionsCorrected.length() > 0) {
	this.accessRestrictions = accessRestrictionsCorrected;
	this.accessRestrictionsRel = restriction.getValue();
	} else {
	this.accessRestrictions = null;
	this.accessRestrictionsRel = null;
	}
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setPlatformRestriction(@Nullable Access restriction, @Nullable Collection<Platform> platforms) {
	if (restriction != null && platforms != null) {
	this.platformRestrictions = platforms.stream().map(Platform::getValue).collect(Collectors.joining(" "));
	this.platformRestrictionsRel = restriction.getValue();
	} else {
	this.platformRestrictions = null;
	this.platformRestrictionsRel = null;
	}
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension addPrice(float price, @NotNull String currency, @Nullable PriceType type, @Nullable Resolution resolution) {
	if (prices == null) {
	this.prices = new ArrayList<>();
	}
	PriceImpl newPrice = new PriceImpl();
	newPrice.price = String.valueOf(price);
	newPrice.currency = currency;
	newPrice.type = type != null ? type.getValue() : null;
	newPrice.resolution = resolution != null ? resolution.getValue() : null;
	prices.add(newPrice);
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setRequiresSubscription(Boolean requiresSubscription) {
	this.requiresSubscription = booleanToString(requiresSubscription);
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setUploader(String uploader) {
	this.uploader = uploader;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setUploaderUrl(String uploaderInfo) {
	this.uploaderInfo = uploaderInfo;
	return this;
	}

	@Override
	@NotNull
	public GoogleVideoExtension setLive(Boolean live) {
	this.live = booleanToString(live);
	return this;
	}

	@Override
	public void writeTo(@NotNull XMLStreamWriter writer) throws XMLStreamException {
	writeReq(writer, thumbnailLocation, "thumbnail_loc", "thumbnail location missing");
	writeReq(writer, title, "title", "title missing");
	writeReq(writer, description, "description", "description missing");

	if (contentLocation == null && playerLocation == null) {
	throw new XMLStreamException("either content location or player location is required");
	} else if (contentLocation != null) {
	write(writer, contentLocation, "content_loc");
	} else {
	write(writer, playerLocation, "player_loc");
	}

	writeCond(writer, duration, "duration");
	writeCond(writer, expirationDate, "expiration_date");
	writeCond(writer, rating, "rating");
	writeCond(writer, viewCount, "view_count");
	writeCond(writer, publicationDate, "publication_date");
	writeTags(writer);
	writeCond(writer, category, "category");
	writeCond(writer, familyFriendly, "family_friendly");
	writeRestriction(writer, accessRestrictions, accessRestrictionsRel, "restriction");
	writePrices(writer);
	writeCond(writer, requiresSubscription, "requires_subscription");
	writeUploader(writer);
	writeRestriction(writer, platformRestrictions, platformRestrictionsRel, "platform");
	writeCond(writer, live, "live");
	}

	private void writeTags(XMLStreamWriter writer) throws XMLStreamException {
	if (tags != null) {
	if (tags.size() > 32) {
	LOG.warn("Truncating tags as more then 32 were given: {}", tags.size());
	}
	for (String tag : tags.subList(0, Math.min(tags.size(), 32))) {
	writer.writeStartElement("tag");
	writer.writeCharacters(tag);
	writer.writeEndElement();
	}
	}
	}

	private void writePrices(XMLStreamWriter writer) throws XMLStreamException {
	if (prices != null) {
	for (PriceImpl price : prices) {
	writer.writeStartElement("price");
	writer.writeAttribute("currency", price.currency);
	if (price.type != null) {
	writer.writeAttribute("type", price.type);
	}
	if (price.resolution != null) {
	writer.writeAttribute("resolution", price.resolution);
	}
	writer.writeCharacters(price.price);
	writer.writeEndElement();
	}
	}
	}

	private void writeUploader(XMLStreamWriter writer) throws XMLStreamException {
	if (uploader != null) {
	writer.writeStartElement("uploader");
	if (uploaderInfo != null) {
	writer.writeAttribute("info", uploaderInfo);
	}
	writer.writeCharacters(uploader);
	writer.writeEndElement();
	}
	}

	private static void writeRestriction(XMLStreamWriter writer, String value, String rel, String tag) throws XMLStreamException {
	if (value != null) {
	writer.writeStartElement(tag);
	writer.writeAttribute("relationship", rel);
	writer.writeCharacters(value);
	writer.writeEndElement();
	}
	}
	}
	}