Example usage for java.util ArrayList trimToSize

Introduction

In this page you can find the example usage for java.util ArrayList trimToSize.

Prototype

public void trimToSize() 

Source Link

Document

Trims the capacity of this ArrayList instance to be the list's current size.

Usage

From source file:Main.java

private static List<Object> recursiveAggregateTree(List<Object> items, int maxPerList) {
    if (items.size() > maxPerList) {
        ArrayList<Object> aggregateList = new ArrayList<Object>(maxPerList);
        ArrayList<Object> childList = null;

        for (Object item : items) {
            if (childList == null || childList.size() == maxPerList) {
                childList = new ArrayList<Object>(maxPerList);
                aggregateList.add(childList);
            }//w w w.  j a  v a 2  s.co  m
            childList.add(item);
        }
        childList.trimToSize();

        aggregateList.addAll(recursiveAggregateTree(aggregateList, maxPerList));

        aggregateList.trimToSize();

        return aggregateList;
    } else {
        // This is a safe blind cast since only subsequent calls of this method will end up here
        // and this method always uses ArrayList<Object>
        return items;
    }
}

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From source file:Main.java

private static List<Object> recursiveAggregateTree(List<Object> items, int maxPerList) {
    if (items.size() > maxPerList) {
        ArrayList<Object> aggregateList = new ArrayList<Object>(maxPerList);
        ArrayList<Object> childList = null;

        for (Object item : items) {
            if (childList == null || childList.size() == maxPerList) {
                childList = new ArrayList<Object>(maxPerList);
                aggregateList.add(childList);
            }/*from   w  w  w . j  av a  2 s .  com*/
            childList.add(item);
        }
        if (childList != null) {
            childList.trimToSize();
        }

        aggregateList.addAll(recursiveAggregateTree(aggregateList, maxPerList));

        aggregateList.trimToSize();

        return aggregateList;
    } else {
        // This is a safe blind cast since only subsequent calls of this method will end up here
        // and this method always uses ArrayList<Object>
        return items;
    }
}

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From source file:org.tinygroup.commons.tools.CollectionUtil.java

/** <code>ArrayList</code> */
public static <T> ArrayList<T> createArrayList(Iterable<? extends T> c) {
    ArrayList<T> list;

    if (c instanceof Collection<?>) {
        list = new ArrayList<T>((Collection<? extends T>) c);
    } else {//from w  w w  .j a  v a 2s.c  om
        list = new ArrayList<T>();

        iterableToCollection(c, list);

        list.trimToSize();
    }

    return list;
}

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From source file:org.n52.test.mock.MockUtil.java

public static Collection<String> getParserPropertyValues(Class<? extends IParser> clazz, String propertyName) {
    String clazzName = clazz.getName();
    ArrayList<String> propertyList = new ArrayList<String>();
    try {/*ww  w.  ja  va2  s. co  m*/
        WPSConfig mockConfig = MockUtil.getMockConfig();
        PropertyDocument.Property properties[] = mockConfig.getPropertiesForParserClass(clazzName);
        for (Property property : properties) {
            if (propertyName.equals(property.getName())) {
                propertyList.add(property.getStringValue());
            }
        }
        propertyList.trimToSize();
    } catch (Exception e) {
        System.err.println("ERROR parsing property " + propertyName + " for Parser class " + clazzName);
    }
    return propertyList;
}

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From source file:org.n52.test.mock.MockUtil.java

public static Collection<String> getGeneratorPropertyValues(Class<? extends IGenerator> clazz,
        String propertyName) {//from ww w  . j a v  a 2s  . co  m
    String clazzName = clazz.getName();
    ArrayList<String> propertyList = new ArrayList<String>();
    try {
        WPSConfig mockConfig = MockUtil.getMockConfig();
        PropertyDocument.Property properties[] = mockConfig.getPropertiesForGeneratorClass(clazzName);
        for (Property property : properties) {
            if (propertyName.equals(property.getName())) {
                propertyList.add(property.getStringValue());
            }
        }
    } catch (Exception e) {
        System.err.println("ERROR parsing property " + propertyName + " for Generator class " + clazzName);
    }
    propertyList.trimToSize();
    return propertyList;
}

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From source file:com.silverwrist.util.StringUtils.java

/**
 * Splits the provided text into a list, based on a given separator. The separator is not included in the
 * returned String list. The maximum number of splits to perfom can be controlled.
 *
 * @param text The string to parse./* ww w .j ava 2  s  . c  o  m*/
 * @param separator Character used as the delimiter.
 * @param limit The maximum number of elements to include in the list. A zero or negative value implies no limit.
 * @return A list of parsed Strings.
 */
public static final List split1List(String text, char separator, int limit) {
    if (text == null)
        return Collections.EMPTY_LIST;
    if (limit <= 0)
        limit = Integer.MAX_VALUE;
    ArrayList rc = new ArrayList();
    String work = text;
    int p = work.indexOf(separator);
    while ((work.length() > 0) && (p >= 0) && (--limit > 0)) { // add elements to the ArrayList
        if (p == 0)
            rc.add("");
        else
            rc.add(work.substring(0, p));
        work = work.substring(p + 1);
        p = work.indexOf(separator);

    } // end while

    rc.add(work);
    rc.trimToSize();
    return rc;

}

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From source file:it.unibo.alchemist.language.EnvironmentBuilder.java

@SuppressWarnings("unchecked")
private static <E> E coreOperations(final Map<String, Object> environment, final Node root, final String type,
        final RandomGenerator random) throws InstantiationException, IllegalAccessException,
        InvocationTargetException, ClassNotFoundException {
    final NamedNodeMap atts = root.getAttributes();
    final Node nameNode = atts.getNamedItem(NAME);
    final String name = nameNode == null ? "" : nameNode.getNodeValue();
    if (!name.equals("") && atts.getLength() == 1 && environment.containsKey(name)) {
        return (E) environment.get(name);
    }/*from ww w . j a  v a 2  s  .c  o m*/
    final Class<?> objClass = (Class<?>) Class.forName(type);
    final List<Constructor<E>> consList = unsafeExtractConstructors(objClass);
    final ArrayList<String> params = new ArrayList<String>();
    int index = 0;
    for (Node param = atts.getNamedItem("p0"); param != null; param = atts.getNamedItem("p" + (++index))) {
        params.add(param.getNodeValue());
    }
    params.trimToSize();
    final E res = tryToBuild(consList, params, environment, random);
    environment.put(name, res);
    return res;
}

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From source file:org.parosproxy.paros.network.SSLConnector.java

private static String[] extractSupportedProtocols(String[] enabledProtocols) {
    if (enabledProtocols == null || enabledProtocols.length == 0) {
        throw new IllegalArgumentException("Protocol(s) required but no protocol set.");
    }/*  w  w w  .  j av a 2  s  . c om*/
    String[] supportedProtocols = getSupportedProtocols();
    ArrayList<String> enabledSupportedProtocols = new ArrayList<>(supportedProtocols.length);
    for (String protocol : enabledProtocols) {
        if (protocol != null && Arrays.binarySearch(supportedProtocols, protocol) >= 0) {
            enabledSupportedProtocols.add(protocol);
        }
    }
    enabledSupportedProtocols.trimToSize();

    if (enabledSupportedProtocols.isEmpty()) {
        throw new IllegalArgumentException("No supported protocol(s) set.");
    }

    String[] extractedSupportedProtocols = new String[enabledSupportedProtocols.size()];
    enabledSupportedProtocols.toArray(extractedSupportedProtocols);
    return extractedSupportedProtocols;
}

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From source file:com.romanenco.gitt.git.GitHelper.java

/**
 * Read log messages, up to maxRecords/*  w  ww. ja v a2s  .c o m*/
 * 
 * @param repoPath
 * @param maxRecords
 * @return
 */
public static List<LogEntry> readRepoHistory(String repoPath, int maxRecords) {
    ArrayList<LogEntry> result = new ArrayList<GitHelper.LogEntry>(maxRecords);
    try {
        Git git = Git.open(new File(repoPath));
        Iterable<RevCommit> logs = git.log().call();
        for (RevCommit commit : logs) {
            result.add(new LogEntry(commit));
            if (--maxRecords == 0)
                break;
        }
    } catch (IOException e) {
        Log.e(TAG, "IO", e);
    } catch (NoHeadException e) {
        Log.e(TAG, "NoHead", e);
    } catch (GitAPIException e) {
        Log.e(TAG, "GitApi", e);
    }
    if (maxRecords > 0) {
        result.trimToSize();
    }
    return result;
}

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From source file:org.bultreebank.labpipe.converters.LineConverter.java

/**
 * Returns a converted Line encoded data from a <code>String</code> to a 
 * {@link Conll} object.//from  w w  w  .ja  v a  2  s  . co m
 * 
 * @param   lines  Line encoded data
 * @param   eosToken   end of sentence token
 * @param   conllMap    <code>Map</code> containing connections between full
 *                      BTB tags and their respective CoNLL forms.
 * @return  {@link Conll}
 */
public static Conll toConll(String lines, String eosToken, Properties conllMap) {

    Conll conll = new Conll();

    int num = 1;

    ArrayList<String> sentence = new ArrayList(100);

    for (String line : lines.split("\n")) {

        line = line.trim();

        if (line.startsWith("##")
                || (!(line.contains(" ") || line.contains("\t")) && !line.contains(eosToken))) {
            continue;
        }
        if (line.contains(eosToken)) {
            num = 1;
            sentence.trimToSize();
            conll.add(sentence);
            sentence = new ArrayList(100);
        } else {
            sentence.add(DataUtils.lineTokenToConllToken(line, num, conllMap));
            num++;
        }

    }

    sentence.trimToSize();

    if (sentence.size() > 0) {

        conll.add(sentence);

    }

    conll.trimToSize();

    return conll;
}

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