info.joseluismartin.gtc.TmsCache.java Source code

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Here is the source code for info.joseluismartin.gtc.TmsCache.java

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/*
 * Copyright 2009-2011 the original author or authors.
 *
 * 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 info.joseluismartin.gtc;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Tile Cache for TMS servers.
 * 
 * @author Jose Luis Martin - (jlm@joseluismartin.info)
 */
public class TmsCache extends AbstractTileCache {

    private static final Log log = LogFactory.getLog(TmsCache.class);

    /**
     * {@inheritDoc}
     */
    @Override
    protected Tile parseTile(String uri) {
        Tile tile = null;
        try {
            String[] parts = uri.split("/");
            if (parts.length != 5)
                return null;
            String version = parts[0];
            String map = parts[1];
            int zoom = Integer.parseInt(parts[2]);
            int x = Integer.parseInt(parts[3]);
            String[] file = parts[4].split("\\.");
            int y = Integer.parseInt(file[0]);
            String mimeType = "image/" + file[1];

            tile = new TmsTile(x, y, zoom, map, version);
            tile.setMimeType(mimeType);
        } catch (Exception e) {
            log.error(e);
        }

        return tile;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected String getCachePath(Tile tile) {
        int x = tile.getX();
        int y = tile.getY();
        int zoom = tile.getZoom();
        String type = tile.getType();

        String path = getCachePath() + File.separator + getPath();
        if (!StringUtils.isBlank(type)) {
            path += File.separator + type;
        }
        path += File.separator + ((TmsTile) tile).getMap();
        path += File.separator + zoom + File.separator + x / 1024 + File.separator + x % 1024 + File.separator
                + y / 1024 + File.separator + y % 1024 + tile.getFileExension();

        return path;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public InputStream parseResponse(InputStream serverStream, String remoteUri, String localUri)
            throws IOException {
        String response = IOUtils.toString(serverStream);
        response = response.replaceAll(getServerUrl(), localUri + "/" + getPath());

        return IOUtils.toInputStream(response);
    }

}