Example usage for java.util Map isEmpty

Introduction

In this page you can find the example usage for java.util Map isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this map contains no key-value mappings.

Usage

From source file:org.kmnet.com.fw.web.el.Functions.java

/**
 * build query string from map with the specified {@link BeanWrapper}.
 * <p>//from  ww  w . ja v a  2  s .com
 * query string is encoded with "UTF-8".
 * </p>
 * @param map map
 * @param beanWrapper beanWrapper which has the definition of each field.
 * @return query string. if map is not empty, return query string. ex) name1=value&name2=value&...
 */
public static String mapToQuery(Map<String, Object> map, BeanWrapper beanWrapper) {
    if (map == null || map.isEmpty()) {
        return "";
    }
    UriComponentsBuilder builder = UriComponentsBuilder.fromPath("");
    Map<String, Object> uriVariables = new HashMap<String, Object>();
    for (Map.Entry<String, Object> e : map.entrySet()) {
        String name = e.getKey();
        Object value = e.getValue();
        builder.queryParam(name, "{" + name + "}");
        TypeDescriptor sourceType;
        if (beanWrapper != null) {
            sourceType = beanWrapper.getPropertyTypeDescriptor(name);
        } else {
            sourceType = TypeDescriptor.forObject(value);
        }
        uriVariables.put(name, CONVERSION_SERVICE.convert(value, sourceType, STRING_DESC));
    }
    String query = builder.buildAndExpand(uriVariables).encode().toString();
    // remove the beginning symbol character('?') of the query string.
    return query.substring(1);
}

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From source file:cz.cas.lib.proarc.common.process.GenericExternalProcess.java

/**
 * Interpolate parameter values. The replace pattern is {@code ${name}}.
 * @param s a string to search for placeholders
 * @return the resolved string//from  www  .  j  a  v  a2s  .  c  om
 * @see #addParameter(java.lang.String, java.lang.String)
 */
static String interpolateParameters(String s, Map<String, String> parameters) {
    if (s == null || s.length() < 4 || parameters.isEmpty()) { // minimal replaceable value ${x}
        return s;
    }
    // finds ${name} patterns
    Matcher m = REPLACE_PARAM_PATTERN.matcher(s);
    StringBuffer sb = null;
    while (m.find()) {
        if (m.groupCount() == 1) {
            String param = m.group(1);
            String replacement = parameters.get(param);
            if (replacement != null) {
                sb = sb != null ? sb : new StringBuffer();
                m.appendReplacement(sb, Matcher.quoteReplacement(replacement));
            }
        }
    }
    if (sb == null) {
        return s;
    }
    m.appendTail(sb);
    return sb.toString();
}

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From source file:fr.zcraft.zlib.tools.mojang.UUIDFetcher.java

/**
 * Fetches the UUIDs of the given player name from the Mojang API.
 *
 * <p><b>WARNING: this method needs to be called from a dedicated thread, as the requests to
 * Mojang are executed directly in the current thread and, due to the Mojang API rate limit, the
 * thread may be frozen to wait a bit between requests if a lot of UUID are requested.</b></p>
 *
 * <p>You can use a {@link fr.zcraft.zlib.components.worker.Worker} to retrieve UUIDs.</p>
 *
 * @param name A player name.//  w ww. j  a v a2s .co  m
 *
 * @return The player's {@link UUID}, or {@code null} if it was not found.
 * @throws IOException          If an exception occurs while contacting the Mojang API.
 * @throws InterruptedException If the thread is interrupted while sleeping when the system wait
 *                              because of the Mojang API rate limit.
 */
static public UUID fetch(String name) throws IOException, InterruptedException {
    final List<String> nameCollection = Collections.singletonList(name);

    final Map<String, UUID> uuid = fetch(nameCollection);
    if (uuid.isEmpty())
        fetchRemaining(nameCollection, uuid);

    return uuid.get(name);
}

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From source file:org.bigtester.ate.GlobalUtils.java

/**
 * Find db initializer.//ww w  . j a va 2  s .com
 *
 * @param appCtx
 *            the app ctx
 * @return the test database initializer
 */
public static TestDatabaseInitializer findDBInitializer(ApplicationContext appCtx)
        throws NoSuchBeanDefinitionException {
    Map<String, TestDatabaseInitializer> dbInit = appCtx.getBeansOfType(TestDatabaseInitializer.class);

    if (dbInit.isEmpty()) {
        throw new NoSuchBeanDefinitionException(TestDatabaseInitializer.class);
    } else {
        TestDatabaseInitializer retVal = dbInit.values().iterator().next();
        if (null == retVal) {
            throw new NoSuchBeanDefinitionException(TestDatabaseInitializer.class);
        } else {
            return retVal;
        }
    }
}

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From source file:com.ikon.util.DatabaseMetadataUtils.java

/**
 * Obtain a DatabaseMetadataValue from a Map
 *//*ww  w  .  j a  va  2  s  .c  om*/
public static DatabaseMetadataValue getDatabaseMetadataValueByMap(Map<String, String> map)
        throws DatabaseException, IllegalAccessException, InvocationTargetException {
    DatabaseMetadataValue dmv = new DatabaseMetadataValue();

    if (!map.isEmpty() && map.containsKey(DatabaseMetadataMap.MV_NAME_TABLE)) {
        dmv.setTable(map.get(DatabaseMetadataMap.MV_NAME_TABLE));

        if (map.containsKey(DatabaseMetadataMap.MV_NAME_ID)) {
            dmv.setId(new Double(map.get(DatabaseMetadataMap.MV_NAME_ID)).longValue());
        }

        List<DatabaseMetadataType> types = DatabaseMetadataDAO.findAllTypes(dmv.getTable());
        for (DatabaseMetadataType emt : types) {
            if (!emt.getVirtualColumn().equals(DatabaseMetadataMap.MV_NAME_ID)
                    && !emt.getVirtualColumn().equals(DatabaseMetadataMap.MV_NAME_TABLE)) {
                if (map.keySet().contains(emt.getVirtualColumn())) {
                    BeanUtils.setProperty(dmv, emt.getRealColumn(), map.get(emt.getVirtualColumn()));
                }
            }
        }
    }

    return dmv;
}

---

From source file:org.terasoluna.gfw.web.el.Functions.java

/**
 * build query string from map with the specified {@link BeanWrapper}.
 * <p>// ww w .  jav  a  2s  . co m
 * query string is encoded with "UTF-8".<br>
 * <strong>Use {@link #mapToQuery(Map)} instead of this method.</strong>
 * </p>
 * @see ObjectToMapConverter
 * @param map map
 * @param beanWrapper beanWrapper which has the definition of each field.
 * @return query string. if map is not empty, return query string. ex) name1=value&amp;name2=value&amp;...
 * @deprecated (since 5.0.1, to support nested fields in f:query, Use {@link #mapToQuery(Map)} instead of this method.)
 */
@Deprecated
public static String mapToQuery(Map<String, Object> map, BeanWrapper beanWrapper) {
    if (map == null || map.isEmpty()) {
        return "";
    }
    UriComponentsBuilder builder = UriComponentsBuilder.fromPath("");
    for (Map.Entry<String, Object> e : map.entrySet()) {
        String name = e.getKey();
        Object value = e.getValue();
        TypeDescriptor sourceType;
        if (beanWrapper != null) {
            sourceType = beanWrapper.getPropertyTypeDescriptor(name);
        } else {
            sourceType = TypeDescriptor.forObject(value);
        }
        builder.queryParam(name, CONVERSION_SERVICE.convert(value, sourceType, STRING_DESC));
    }
    String query = builder.build().encode().toString();
    // remove the beginning symbol character('?') of the query string.
    return query.substring(1);
}

---

From source file:com.gson.util.HttpKit.java

/**
 * mapurl/*from  www  .j  a  va2s  . co  m*/
 * @return       : 
 * @throws UnsupportedEncodingException 
 */
public static String map2Url(Map<String, String> paramToMap) throws UnsupportedEncodingException {
    if (null == paramToMap || paramToMap.isEmpty()) {
        return null;
    }
    StringBuffer url = new StringBuffer();
    boolean isfist = true;
    for (Entry<String, String> entry : paramToMap.entrySet()) {
        if (isfist) {
            isfist = false;
        } else {
            url.append("&");
        }
        url.append(entry.getKey()).append("=");
        String value = entry.getValue();
        if (StringUtils.isNotEmpty(value)) {
            url.append(URLEncoder.encode(value, DEFAULT_CHARSET));
        }
    }
    return url.toString();
}

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From source file:Main.java

/**
 * Checks if the given map is not empty.
 *
 * @param map//w w  w  .  j  ava  2 s. c  o m
 *          map to check
 * @return <code>true</code> if the given reference is not <code>null</code> and map is not empty
 */
public static boolean isNotEmpty(final Map<?, ?> map) {
    return map != null && !map.isEmpty();
}

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From source file:com.sangupta.snowpack.SnowpackRecover.java

/**
 * Start the recovery process.//from   ww  w .ja v  a2  s.  c om
 * 
 * @param baseDirectory
 */
public static void recover(final File baseDirectory) {
    // basic checks
    if (baseDirectory == null) {
        throw new IllegalArgumentException("Base directory cannot be empty");
    }

    if (!baseDirectory.isDirectory()) {
        throw new IllegalArgumentException("Base directory path does not represent a valid directory");
    }

    // now read all files from disk
    File[] files = baseDirectory.listFiles();
    if (files == null || files.length == 0) {
        System.out.println("No file found in the base directory... nothing to recover.");
        return;
    }

    // get all valid chunks from disk
    Map<Integer, File> validChunks = getValidChunks(files);

    // now check each chunk to find out the number of files in it
    if (validChunks.isEmpty()) {
        System.out.println("No valid snowpack chunks were found... nothing to recover.");
        return;
    }

    // rename the current metadata directory if any
    try {
        renameOldMetadataDirectory(baseDirectory);
    } catch (IOException e) {
        System.out.println("Unable to rename existing metadata directory... rename and run recovery again!");
        return;
    }

    // create a new metadata directory
    System.out.println("Creating new METADATA database for recovery...");
    final SnowpackMetadataDB metadataDB = new SnowpackMetadataDB(baseDirectory, false, 1000); // do not cache metadata 

    // iterate over all chunks
    List<ChunkInfo> chunkInfos = new ArrayList<ChunkInfo>();

    int totalFiles = 0;

    for (Entry<Integer, File> entry : validChunks.entrySet()) {
        File chunkFile = entry.getValue();
        int chunkID = entry.getKey();

        // now recover the file
        System.out.print("Recovering from chunk file: " + chunkFile.getAbsolutePath() + "...");
        ChunkInfo chunkInfo = null;
        try {
            chunkInfo = recoverChunkInfo(chunkID, chunkFile, metadataDB);
        } catch (FileNotFoundException e) {
            // this shall never happen as we just read the file
            // eat up
        } catch (IOException e) {
            // this happens when we are unable to read through file
            // or descriptors are not correct
            // eat up
        }

        if (chunkInfo == null) {
            System.out.println("failed.");
            continue;
        }

        // add to list of chunk infos
        chunkInfos.add(chunkInfo);
        totalFiles += chunkInfo.numFiles;
        System.out.println("recovered!");

        System.out.println("Recovered chunk-info: " + chunkInfo);
    }

    // close the metadata DB
    System.out.println("Closing recovered METADATA database...");
    metadataDB.close();

    // now check if something was recovered
    if (chunkInfos.isEmpty()) {
        System.out.println("Unable to recover anything from the chunk files... Sorry!");
        return;
    }

    // save this chunk info file
    Collections.sort(chunkInfos);
    writeSnowpackMeta(baseDirectory, chunkInfos);

    // output total files
    System.out.println("Total number of files in pack: " + totalFiles);
}

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From source file:com.amazonaws.services.sqs.MessageMD5ChecksumHandler.java

/**
 * Throw an exception if the MD5 checksums returned in the
 * SendMessageBatchResult do not match the client-side calculation based on
 * the original messages in the SendMessageBatchRequest.
 *//*ww w.ja  va 2  s  .  c om*/
private static void sendMessageBatchOperationMd5Check(SendMessageBatchRequest sendMessageBatchRequest,
        SendMessageBatchResult sendMessageBatchResult) {
    Map<String, SendMessageBatchRequestEntry> idToRequestEntryMap = new HashMap<String, SendMessageBatchRequestEntry>();
    if (sendMessageBatchRequest.getEntries() != null) {
        for (SendMessageBatchRequestEntry entry : sendMessageBatchRequest.getEntries()) {
            idToRequestEntryMap.put(entry.getId(), entry);
        }
    }

    if (sendMessageBatchResult.getSuccessful() != null) {
        for (SendMessageBatchResultEntry entry : sendMessageBatchResult.getSuccessful()) {
            String messageBody = idToRequestEntryMap.get(entry.getId()).getMessageBody();
            String bodyMd5Returned = entry.getMD5OfMessageBody();
            String clientSideBodyMd5 = calculateMessageBodyMd5(messageBody);
            if (!clientSideBodyMd5.equals(bodyMd5Returned)) {
                throw new AmazonClientException(String.format(MD5_MISMATCH_ERROR_MESSAGE_WITH_ID, MESSAGE_BODY,
                        entry.getId(), clientSideBodyMd5, bodyMd5Returned));
            }

            Map<String, MessageAttributeValue> messageAttr = idToRequestEntryMap.get(entry.getId())
                    .getMessageAttributes();
            if (messageAttr != null && !messageAttr.isEmpty()) {
                String attrMd5Returned = entry.getMD5OfMessageAttributes();
                String clientSideAttrMd5 = calculateMessageAttributesMd5(messageAttr);
                if (!clientSideAttrMd5.equals(attrMd5Returned)) {
                    throw new AmazonClientException(String.format(MD5_MISMATCH_ERROR_MESSAGE_WITH_ID,
                            MESSAGE_ATTRIBUTES, entry.getId(), clientSideAttrMd5, attrMd5Returned));
                }
            }
        }
    }
}

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