Example usage for com.google.common.base Strings isNullOrEmpty

Introduction

In this page you can find the example usage for com.google.common.base Strings isNullOrEmpty.

Prototype

public static boolean isNullOrEmpty(@Nullable String string)

Source Link

Document

Returns true if the given string is null or is the empty string.

Usage

From source file:qa.qcri.qnoise.util.CSVTools.java

/**
 * Loads CSV file into database.//from  ww  w. j  a  va  2s.  c om
 * @param file CSV file path.
 * @param dbConfig DB connection config.
 * @param tableName target import table name.
 * @param delimiter CSV delimiter.
 * @return the number of bytes loaded into the target database.
 */
public static int load(String file, DBConfig dbConfig, String tableName, char delimiter) throws Exception {
    Preconditions.checkNotNull(dbConfig);
    Preconditions.checkNotNull(file);

    Connection conn = null;
    Statement stat = null;
    BufferedReader reader = null;
    int result = 0;
    try {
        conn = DBTools.createConnection(dbConfig, true);
        stat = conn.createStatement();
        if (DBTools.existTable(dbConfig, tableName)) {
            stat.executeUpdate("DROP TABLE " + tableName);
        }

        // create table based on the header
        reader = new BufferedReader(new FileReader(file));
        String header = reader.readLine();
        if (!Strings.isNullOrEmpty(header)) {
            String[] columns = header.split(Character.toString(delimiter));
            StringBuilder schemaSql = new StringBuilder("CREATE TABLE " + tableName + " (");
            boolean isFirst = true;
            for (String column : columns) {
                if (!isFirst) {
                    schemaSql.append(",");
                }
                isFirst = false;
                schemaSql.append(column).append(" VARCHAR(10240) ");
            }
            schemaSql.append(")");
            stat.execute(schemaSql.toString());

            SQLDialect dialect = dbConfig.getDialect();
            SQLDialectBase dialectBase = SQLDialectBase.createDialectBaseInstance(dialect);
            if (dialectBase.supportBulkLoad()) {
                result = dialectBase.bulkLoad(dbConfig, tableName, file, delimiter);
            } else {
                throw new UnsupportedOperationException("Non-bulk loading is not yet implemented.");
            }
        }
    } finally {
        try {
            if (stat != null) {
                stat.close();
            }

            if (conn != null) {
                conn.close();
            }

            if (reader != null) {
                reader.close();
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    return result;
}

From source file:org.apache.isis.core.metamodel.facets.object.domainobject.objectspecid.ObjectSpecIdFacetForJdoPersistenceCapableAnnotation.java

public static ObjectSpecIdFacet create(final JdoPersistenceCapableFacet persistenceCapableFacet,
        final FacetHolder holder) {

    if (persistenceCapableFacet.isNoop()) {
        return null;
    }/*w w  w .  j  a v  a2s.com*/
    final String schema = persistenceCapableFacet.getSchema();
    if (Strings.isNullOrEmpty(schema)) {
        return null;
    }
    final String objectType = schema.toLowerCase(Locale.ROOT) + "." + persistenceCapableFacet.getTable();
    return new ObjectSpecIdFacetForJdoPersistenceCapableAnnotation(objectType, holder);
}

From source file:com.parallax.server.blocklyprop.jsp.GetCdnUrl.java

@Override
public void doTag() throws JspException, IOException {
    if (!Strings.isNullOrEmpty(url)) {
        // System.out.println("Geturl: " + url);

        PageContext pageContext = (PageContext) getJspContext();
        JspWriter out = pageContext.getOut();

        String cdnUrl = Properties.getConfiguration().getString("cdnfiles.baseurl");
        if (pageContext.getRequest().isSecure()) {
            cdnUrl = cdnUrl.replaceFirst("http://", "https://");
            cdnUrl = Properties.getConfiguration().getString("cdnfiles.baseurl.https", cdnUrl);
        }/*from ww w. j av  a2s . c  o  m*/

        out.write(cdnUrl + (url.startsWith("/") ? "" : "/") + url);
    } else {
        System.out.println("Url = null or empty");
    }
}

From source file:org.apache.isis.core.metamodel.facets.object.value.annotcfg.ValueFacetAnnotation.java

private static String semanticsProviderName(final Class<?> annotatedClass,
        final IsisConfiguration configuration) {
    final Value annotation = annotatedClass.getAnnotation(Value.class);
    final String semanticsProviderName = annotation.semanticsProviderName();
    if (!Strings.isNullOrEmpty(semanticsProviderName)) {
        return semanticsProviderName;
    }// w  w w .  j  a  va2 s  .  c  om
    return ValueSemanticsProviderUtil.semanticsProviderNameFromConfiguration(annotatedClass, configuration);
}

From source file:org.obiba.opal.web.magma.vcs.Dtos.java

public static Opal.VcsCommitInfoDto asDto(CommitInfo commitInfo) {
    Opal.VcsCommitInfoDto.Builder commitInfoDtoBuilder = Opal.VcsCommitInfoDto.newBuilder() //
            .setAuthor(commitInfo.getAuthorName()) //
            .setDate(commitInfo.getDateAsIso8601()) //
            .setCommitId(commitInfo.getCommitId()) //
            .setComment(commitInfo.getComment()) //
            .setIsHead(commitInfo.isHead()) //
            .setIsCurrent(commitInfo.isCurrent());

    List<String> diffEntries = commitInfo.getDiffEntries();
    if (diffEntries != null) {
        commitInfoDtoBuilder.addAllDiffEntries(diffEntries);
    }/*  ww  w . ja v  a  2 s.c o  m*/
    String blob = commitInfo.getBlob();
    if (!Strings.isNullOrEmpty(blob)) {
        commitInfoDtoBuilder.setBlob(blob);
    }
    return commitInfoDtoBuilder.build();
}

From source file:org.apache.isis.core.progmodel.facets.object.parseable.ParserUtil.java

static String parserNameFromConfiguration(final Class<?> type, final IsisConfiguration configuration) {
    final String key = PARSER_NAME_KEY_PREFIX + type.getCanonicalName() + PARSER_NAME_KEY_SUFFIX;
    final String parserName = configuration.getString(key);
    return !Strings.isNullOrEmpty(parserName) ? parserName : null;
}

From source file:org.apache.isis.viewer.wicket.ui.components.layout.bs3.Util.java

public static void appendCssClass(final MarkupContainer markupContainer, final BS3ElementAbstract element,
        final String existingCssClass) {
    final String cssClass = existingCssClass
            + (!Strings.isNullOrEmpty(element.getCssClass()) ? (" " + element.getCssClass()) : "");
    CssClassAppender.appendCssClassTo(markupContainer, cssClass);
}

From source file:org.apache.mailet.AttributeName.java

public static AttributeName of(String name) {
    Preconditions.checkNotNull(name, "`name` is compulsory");
    Preconditions.checkArgument(!Strings.isNullOrEmpty(name), "`name` should not be empty");

    return new AttributeName(name);
}

From source file:org.gsafeproject.storage.StorageApp.java

private static boolean isValid(String[] args) {
    if (1 >= args.length || Strings.isNullOrEmpty(args[1])) {
        System.out.println("Usage java -jar storage.jar server /path/configuration.yml");
        return false;
    }//from   w  ww  .j  ava  2 s . c o m
    if (!new File(args[1]).exists()) {
        throw new IllegalArgumentException(String.format("File %s does not exist.", args[1]));
    }
    return true;
}

From source file:org.glowroot.agent.webdriver.tests.SauceLabs.java

public static boolean useSauceLabs() {
    return !Strings.isNullOrEmpty(browserName) || !Strings.isNullOrEmpty(deviceName);
}