org.betaconceptframework.astroboa.resourceapi.utility.BinaryChannelFileAccessInfoProcessor.java Source code

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Here is the source code for org.betaconceptframework.astroboa.resourceapi.utility.BinaryChannelFileAccessInfoProcessor.java

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/*
 * Copyright (C) 2005-2012 BetaCONCEPT Limited
 *
 * This file is part of Astroboa.
 *
 * Astroboa is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Astroboa is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Astroboa.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.betaconceptframework.astroboa.resourceapi.utility;

import java.io.File;
import java.util.regex.Matcher;

import org.apache.commons.lang.StringUtils;
import org.betaconceptframework.astroboa.api.model.BinaryChannel.ContentDispositionType;
import org.betaconceptframework.astroboa.util.CmsConstants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This class is responsible to process urls representing the
 * content api for direct access to a binary channel.
 * 
 * 
 * Content API for direct access to a binary channel has the following two forms, 
 * depending on whether binary channel is managed or unmanaged.
 * 
 * For Managed binary channels
 * 
 * repository-id/datastore/<two-chars>/<two-chars>/<two-chars>/<40-chars>/<mime-type>/width/<3-digits>/height/<3-digits>/contentDispositionType/attachment|inline/filename.extension
 * 
 * and for unmanaged binary channels
 * 
 * repository-id/<one-or-more-chars-for-path>/width/<3-digits>/height/<3-digits>/contentDispositionType/attachment|inline/filename.extension
 * 
 * This class is able to extract necessary information for a given url according to one of these patterns
 * @author Gregory Chomatas (gchomatas@betaconcept.com)
 * @author Savvas Triantafyllou (striantafyllou@betaconcept.com)
 * 
 */
public class BinaryChannelFileAccessInfoProcessor {

    private Logger logger = LoggerFactory.getLogger(getClass());

    private String fileAccessInfoURL;

    private String repositoryId;

    private String fileName;

    private String mimeType;

    private String width;

    private String height;

    private String contentDispositionType;

    private String relativePathToStream;

    public BinaryChannelFileAccessInfoProcessor(String fileAccessInfoURL) {
        this.fileAccessInfoURL = fileAccessInfoURL;

    }

    public boolean processFileAccessInfo() {

        if (StringUtils.isNotBlank(fileAccessInfoURL)) {

            //Apply both patterns as there is no (clean) way to know which one to use
            Matcher uriMatcher = ContentApiUtils.MANAGED_FILE_ACCESS_INFO_PATTERN.matcher(fileAccessInfoURL);

            if (uriMatcher.matches()) {

                logGroups(uriMatcher);

                repositoryId = uriMatcher.group(1);

                fileName = uriMatcher.group(10);

                mimeType = uriMatcher.group(6);

                width = uriMatcher.group(7);

                height = uriMatcher.group(8);

                contentDispositionType = uriMatcher.group(9);

                if (StringUtils.isBlank(contentDispositionType)) {
                    contentDispositionType = ContentDispositionType.INLINE.toString().toLowerCase();
                }

                relativePathToStream = uriMatcher.group(2) + File.separator + uriMatcher.group(3) + File.separator
                        + uriMatcher.group(4) + File.separator + uriMatcher.group(5);

                return true;
            } else {
                //Check second pattern
                uriMatcher = ContentApiUtils.UNMANAGED_FILE_ACCESS_INFO_PATTERN.matcher(fileAccessInfoURL);

                if (uriMatcher.matches()) {

                    logGroups(uriMatcher);

                    repositoryId = uriMatcher.group(1);

                    width = uriMatcher.group(3);

                    height = uriMatcher.group(4);

                    contentDispositionType = uriMatcher.group(5);

                    if (StringUtils.isBlank(contentDispositionType)) {
                        contentDispositionType = ContentDispositionType.INLINE.toString().toLowerCase();
                    }

                    //Since it is unmanaged resource prefix relative path to UnmanagedDataStore directory
                    relativePathToStream = CmsConstants.UNMANAGED_DATASTORE_DIR_NAME + File.separator
                            + uriMatcher.group(2);

                    return true;
                }
            }

        }

        return false;

    }

    private void logGroups(Matcher uriMatcher) {

        if (logger.isDebugEnabled()) {
            for (int j = 1; j <= uriMatcher.groupCount(); j++) {
                logger.debug("Group {} {}", j, uriMatcher.group(j));
            }
        }

    }

    /**
     * @return the repositoryId
     */
    public String getRepositoryId() {
        return repositoryId;
    }

    /**
     * @return the fileName
     */
    public String getFileName() {
        return fileName;
    }

    /**
     * @return the mimeType
     */
    public String getMimeType() {
        return mimeType;
    }

    /**
     * @return the width
     */
    public String getWidth() {
        return width;
    }

    /**
     * @return the height
     */
    public String getHeight() {
        return height;
    }

    /**
     * @return the contentDispositionType
     */
    public String getContentDispositionType() {
        return contentDispositionType;
    }

    /**
     * @return the relativePathToStream
     */
    public String getRelativePathToStream() {
        return relativePathToStream;
    }

}