Examples of VersionRetriever

org.wso2.carbon.registry.core.jdbc.utils.VersionRetriever
Once persisted the versions of a resource will be written as a byte stream and it is often not so useful to be accessed in such a format. This class is able to read through the stream and output a list of versions.
This class works hand in hand with the version input stream, where the version input stream persists data to the database, and the version retriever fetches persisted versions from the database. @see VersionInputStream

Examples of org.wso2.carbon.registry.core.jdbc.utils.VersionRetriever

        // restore the versioned things
        //      get each resource from resource_history and copy to resource
        //      restore contents
        // That's all


        VersionRetriever versionRetriever =
                resourceVersionDAO.getVersionList(resourceID, snapshotID);


        if (versionRetriever == null) {
            String msg = "The snapshot " + snapshotID + " doesn't contain the " +
                    "resource " + resourceID.getPath();
            log.warn(msg);
            throw new AuthorizationFailedException(msg);
        }
        int versionIndex = 0;
        while (true) {
            long version = versionRetriever.getVersion(versionIndex);
            if (version == -1) {
                // no more stream
                break;
            }
            // restore resource and content

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Examples of org.wso2.carbon.registry.core.jdbc.utils.VersionRetriever

            }
        }
    }


    public ResourceImpl get(ResourceIDImpl resourceID, long snapshotID) throws RegistryException {
        VersionRetriever versionRetriever = getVersionList(snapshotID);
        ResourceDO resourceDO = null;
        int versionIndex = 0;
        while (true) {
            long version = versionRetriever.getVersion(versionIndex);
            if (version == -1) {
                // stream is over..
                break;
            }
            resourceDO = getResourceDOArchived(version);

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Examples of org.wso2.carbon.registry.core.jdbc.utils.VersionRetriever

        return resourceImpl;
    }


    public boolean resourceExists(ResourceIDImpl resourceID, long snapshotID)
            throws RegistryException {
        VersionRetriever versionRetriever = getVersionList(snapshotID);
        if (versionRetriever == null) {
            return false;   
        }
        ResourceDO resourceDO = null;
        int versionIndex = 0;
        while (true) {
            long version = versionRetriever.getVersion(versionIndex);
            if (version == -1) {
                // stream is over..
                break;
            }
            resourceDO = getResourceDOArchived(version);

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Examples of org.wso2.carbon.registry.core.jdbc.utils.VersionRetriever

    public VersionRetriever getVersionList(ResourceIDImpl resourceID, long snapshotID)
            throws RegistryException {
        Connection conn = JDBCDatabaseTransaction.getConnection();
        ResultSet result = null;
        PreparedStatement ps = null;
        VersionRetriever versionRetriever = null;
        try {
            if (resourceID.isCollection()) {
                String sql =
                        "SELECT REG_PATH_ID, REG_RESOURCE_VIDS FROM REG_SNAPSHOT " +
                                "WHERE REG_SNAPSHOT_ID=? AND REG_PATH_ID = ? " +
                                "AND REG_RESOURCE_NAME IS NULL AND REG_TENANT_ID=?";
                ps = conn.prepareStatement(sql);
                ps.setLong(1, snapshotID);
                ps.setInt(2, resourceID.getPathID());
                ps.setInt(3, CurrentSession.getTenantId());
            } else {
                String sql =
                        "SELECT REG_PATH_ID, REG_RESOURCE_VIDS FROM REG_SNAPSHOT " +
                                "WHERE REG_SNAPSHOT_ID=? AND REG_PATH_ID = ? " +
                                "AND REG_RESOURCE_NAME=? AND REG_TENANT_ID=?";
                ps = conn.prepareStatement(sql);
                ps.setLong(1, snapshotID);
                ps.setInt(2, resourceID.getPathID());
                ps.setString(3, resourceID.getName());
                ps.setInt(4, CurrentSession.getTenantId());
            }


            result = ps.executeQuery();


            if (result.next()) {
                InputStream resourceVIDStream = RegistryUtils.getMemoryStream(
                        result.getBinaryStream(DatabaseConstants.RESOURCE_VIDS_FIELD));
                versionRetriever = new VersionRetriever(resourceVIDStream);
            }
        } catch (Exception e) {


            String msg = "Failed to get version of resource " + resourceID.getPath() +
                    " of snapshot " + snapshotID + ". " + e.getMessage();

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Examples of org.wso2.carbon.registry.core.jdbc.utils.VersionRetriever


    public VersionRetriever getVersionList(long snapshotID) throws RegistryException {
        Connection conn = JDBCDatabaseTransaction.getConnection();
        ResultSet result = null;
        PreparedStatement ps = null;
        VersionRetriever versionRetriever = null;
        try {
            String sql = "SELECT REG_PATH_ID, REG_RESOURCE_VIDS FROM REG_SNAPSHOT WHERE " +
                    "REG_SNAPSHOT_ID=? AND REG_TENANT_ID=?";
            ps = conn.prepareStatement(sql);
            ps.setLong(1, snapshotID);
            ps.setInt(2, CurrentSession.getTenantId());


            result = ps.executeQuery();


            if (result.next()) {
                InputStream resourceVIDStream = RegistryUtils.getMemoryStream(
                        result.getBinaryStream(DatabaseConstants.RESOURCE_VIDS_FIELD));
                versionRetriever = new VersionRetriever(resourceVIDStream);
            }
        } catch (Exception e) {


            String msg =
                    "Failed to get version of the snapshot " + snapshotID + ". " + e.getMessage();

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Examples of org.wso2.carbon.registry.core.jdbc.utils.VersionRetriever

                    resourceID.getPath() + " is not a collection.";
            log.error(msg);
            throw new RegistryException(msg);
        }


        VersionRetriever versionRetriever = getVersionList(snapshotID);
        int versionIndex = 0;
        ResourceDO resourceDO = null;
        while (true) {
            long version = versionRetriever.getVersion(versionIndex);
            if (version == -1) {
                // no more stream
                break;
            }
            resourceDO = getResourceDOArchived(version);

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