FileMetadataElementProvider.java

/**
 *
 * Copyright 2020 Paul Schaub
 *
 * 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 org.jivesoftware.smackx.file_metadata.provider;

import java.io.IOException;
import java.text.ParseException;

import org.jivesoftware.smack.packet.XmlEnvironment;
import org.jivesoftware.smack.parsing.SmackParsingException;
import org.jivesoftware.smack.provider.ExtensionElementProvider;
import org.jivesoftware.smack.util.ParserUtils;
import org.jivesoftware.smack.xml.XmlPullParser;
import org.jivesoftware.smack.xml.XmlPullParserException;
import org.jivesoftware.smackx.file_metadata.element.FileMetadataElement;
import org.jivesoftware.smackx.hashes.element.HashElement;
import org.jivesoftware.smackx.hashes.provider.HashElementProvider;
import org.jivesoftware.smackx.thumbnails.element.ThumbnailElement;
import org.jivesoftware.smackx.thumbnails.provider.ThumbnailElementProvider;

public class FileMetadataElementProvider extends ExtensionElementProvider<FileMetadataElement> {

    @Override
    public FileMetadataElement parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment)
            throws XmlPullParserException, IOException, SmackParsingException, ParseException {
        FileMetadataElement.Builder builder = FileMetadataElement.builder();

        outerloop: while (true) {
            XmlPullParser.Event event = parser.next();
            switch (event) {
            case START_ELEMENT:
                String name = parser.getName();
                switch (name) {
                    case FileMetadataElement.ELEMENT:
                        parser.next();
                        break;
                    case FileMetadataElement.ELEM_DATE:
                        builder.setModificationDate(ParserUtils.getDateFromNextText(parser));
                        break;
                    case FileMetadataElement.ELEM_DESC:
                        String lang = ParserUtils.getXmlLang(parser);
                        builder.addDescription(ParserUtils.getRequiredNextText(parser), lang);
                        break;
                    case "dimensions": // was replaced with width and height
                        String dimensions = ParserUtils.getRequiredNextText(parser);
                        String[] split = dimensions.split("x");
                        if (split.length != 2) {
                            throw new IllegalArgumentException("Invalid dimensions.");
                        }
                        builder.setWidth(Integer.parseInt(split[0]));
                        builder.setHeight(Integer.parseInt(split[1]));
                        break;
                    case FileMetadataElement.ELEM_WIDTH:
                        builder.setWidth(Integer.parseInt(ParserUtils.getRequiredNextText(parser)));
                        break;
                    case FileMetadataElement.ELEM_HEIGHT:
                        builder.setHeight(Integer.parseInt(ParserUtils.getRequiredNextText(parser)));
                        break;
                    case FileMetadataElement.ELEM_LENGTH:
                        builder.setLength(Long.parseLong(ParserUtils.getRequiredNextText(parser)));
                        break;
                    case FileMetadataElement.ELEM_MEDIA_TYPE:
                        builder.setMediaType(ParserUtils.getRequiredNextText(parser));
                        break;
                    case FileMetadataElement.ELEM_NAME:
                        builder.setName(ParserUtils.getRequiredNextText(parser));
                        break;
                    case FileMetadataElement.ELEM_SIZE:
                        builder.setSize(Long.parseLong(ParserUtils.getRequiredNextText(parser)));
                        break;
                    case HashElement.ELEMENT:
                        builder.addHash(HashElementProvider.INSTANCE.parse(parser, parser.getDepth(), xmlEnvironment));
                        break;
                    case ThumbnailElement.ELEMENT:
                        ThumbnailElementProvider provider = new ThumbnailElementProvider();
                        builder.addThumbnail(provider.parse(parser, parser.getDepth(), xmlEnvironment));
                }
                break;
            case END_ELEMENT:
                if (parser.getDepth() == initialDepth) break outerloop;
                break;
            default:
                // Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
                break;
            }
        }
        return builder.build();
    }
}