edu.jhu.pha.vospace.node.VospaceId.java Source code

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Here is the source code for edu.jhu.pha.vospace.node.VospaceId.java

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/*******************************************************************************
 * Copyright 2013 Johns Hopkins University
 * 
 * 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 edu.jhu.pha.vospace.node;

import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URLDecoder;
import java.text.ParseException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

import edu.jhu.pha.vospace.SettingsServlet;

public class VospaceId {
    private static final Pattern VOS_PATTERN = Pattern
            .compile("vos://[\\w\\d][\\w\\d\\-_\\.!~\\*'\\(\\)\\+=]{2,}![\\w\\d\\-_\\.!~\\*'\\(\\)\\+\\%=/]+");

    private static final String DEFAULT_URI = SettingsServlet.getConfig().getString("region");

    private static final Logger logger = Logger.getLogger(VospaceId.class);

    private NodePath nodePath;
    private String uri;

    public VospaceId(String idStr) throws URISyntaxException {
        URI voURI = new URI(idStr);

        if (!validId(voURI)) {
            throw new URISyntaxException(idStr, "InvalidURI");
        }

        if (!StringUtils.contains(idStr, "vospace")) {
            throw new URISyntaxException(idStr, "InvalidURI");
        }

        this.uri = StringUtils.substringBetween(idStr, "vos://", "!vospace");

        if (this.uri == null)
            throw new URISyntaxException(idStr, "InvalidURI");

        try {
            String pathStr = URLDecoder.decode(StringUtils.substringAfter(idStr, "!vospace"), "UTF-8");
            this.nodePath = new NodePath(pathStr);
        } catch (UnsupportedEncodingException e) {
            // should not happen
            logger.error(e.getMessage());
        }

    }

    /**
     * Creates new Vospace ID with current URI
     * @param path Node path
     * @throws URISyntaxException
     */
    public VospaceId(NodePath path) throws URISyntaxException {
        this(path, DEFAULT_URI);
    }

    /**
     * Creates new Vospace ID
     * @param path Node path
     * @param uri Node ID uri
     * @throws URISyntaxException
     */
    private VospaceId(NodePath path, String uri) throws URISyntaxException {
        this.nodePath = new NodePath(path.getNodeStoragePath(), path.isEnableAppContainer());
        this.uri = uri;
        this.nodePath.setEnableAppContainer(path.isEnableAppContainer());
    }

    public URI getId() {
        try {
            return toUri(nodePath.getNodeStoragePath(), uri);
        } catch (URISyntaxException ex) {
            // Should be already checked in the constructor
            logger.error(ex.getMessage());
            return null;
        }
    }

    private static URI toUri(String path, String uri) throws URISyntaxException {
        return new URI("vos", "//" + uri + "!vospace" + path, null);
    }

    /**
     * Check whether the specified identifier is valid
     * @param id The identifier to check
     * @return whether the identifier is valid or not
     */
    private static boolean validId(URI id) {
        Matcher m = VOS_PATTERN.matcher(id.toString());
        return m.matches();
    }

    /**
     * Check whether the specified identifier is local
     * @param id The identifier to check
     * @return whether the identifier is local or not
     */
    public boolean isLocalId(String uri) {
        return this.uri.equals(uri);
    }

    public VospaceId appendPath(NodePath path) throws URISyntaxException {
        return new VospaceId(this.nodePath.append(path), this.uri);
    }

    public NodePath getNodePath() {
        return this.nodePath;
    }

    public String toString() {
        return this.getId().toASCIIString();
    }

    public VospaceId getParent() throws URISyntaxException {
        return new VospaceId(this.getNodePath().getParentPath(), this.uri);
    }

    public static final void main(String[] s) throws URISyntaxException, ParseException {
        VospaceId[] ids = new VospaceId[] { new VospaceId("vos://edu.jhu!vospace/cont3/data1"),
                new VospaceId("vos://edu.jhu!vospace/cont3"), new VospaceId("vos://edu.jhu!vospace/"),
                new VospaceId("vos://edu.jhu!vospace"), new VospaceId(new NodePath("/cont3/data1"), "edu.jhu"),
                new VospaceId(new NodePath("/"), "edu.jhu"), };

        for (VospaceId id1 : ids) {
            System.out.println(id1.toString());
            System.out.println(id1.isLocalId("edu.jhu"));
            System.out.println(id1.isLocalId("edu.jhu2"));
            //System.out.println(id1.samePath("/cont3/data1"));
            //System.out.println(id1.samePath("/cont3/data2"));
            //System.out.println(id1.id.getRawAuthority()+" "+id1.id.getPath());
            System.out.println();
        }

        //System.out.println(new VospaceId("vos://edu.jhu!vospace/cont3/data1/data4").getRelativePath(new VospaceId("vos://edu.jhu!vospace/cont3")));
    }

}