Example usage for com.google.common.collect Lists newArrayListWithExpectedSize

Introduction

In this page you can find the example usage for com.google.common.collect Lists newArrayListWithExpectedSize.

Prototype

@GwtCompatible(serializable = true)
public static <E> ArrayList<E> newArrayListWithExpectedSize(int estimatedSize)

Source Link

Document

Creates an ArrayList instance to hold estimatedSize elements, plus an unspecified amount of padding; you almost certainly mean to call #newArrayListWithCapacity (see that method for further advice on usage).

Usage

From source file:com.cloudera.oryx.computation.common.records.Specs.java

public static List<Integer> getFieldIds(Spec spec, List<String> values) {
    if (values.isEmpty()) {
        return ImmutableList.of();
    }/*from   w  ww .ja va  2s  . c o  m*/
    List<Integer> fieldIds = Lists.newArrayListWithExpectedSize(values.size());
    if (spec == null || spec.getField(values.get(0)) == null) {
        for (String value : values) {
            try {
                fieldIds.add(Integer.valueOf(value));
            } catch (NumberFormatException e) {
                throw new IllegalArgumentException("Did not recognize column ID: " + value);
            }
        }
    } else {
        for (String value : values) {
            FieldSpec f = spec.getField(value);
            if (f != null) {
                fieldIds.add(f.position());
            }
        }
    }
    return fieldIds;
}

From source file:org.apache.druid.query.Queries.java

public static List<PostAggregator> decoratePostAggregators(List<PostAggregator> postAggs,
        Map<String, AggregatorFactory> aggFactories) {
    List<PostAggregator> decorated = Lists.newArrayListWithExpectedSize(postAggs.size());
    for (PostAggregator aggregator : postAggs) {
        decorated.add(aggregator.decorate(aggFactories));
    }//from  w  w w.ja  v  a 2 s.  c om
    return decorated;
}

From source file:com.cloudera.exhibit.mongodb.BSONObsDescriptor.java

private static List<String> getColumns(List<String> names, final Map<String, String> mappings) {
    List<String> ret = Lists.newArrayListWithExpectedSize(names.size());
    for (int i = 0; i < names.size(); i++) {
        String key = names.get(i);
        String col = mappings.get(key);
        ret.add(col == null ? key : col);
    }/*from  w ww. j a  v  a 2s.c o m*/
    return ret;
}

From source file:nextmethod.web.razor.parser.syntaxtree.BlockExtensions.java

public static Collection<SyntaxTreeNode> buildSpanConstructors(final Collection<SyntaxTreeNode> children) {
    final List<SyntaxTreeNode> built = Lists.newArrayListWithExpectedSize(children.size());
    for (SyntaxTreeNode child : children) {
        if (ISpanConstructorClass.isAssignableFrom(child.getClass())) {
            built.add(ISpanConstructorClass.cast(child).build());
        } else {//from   w w w . ja v  a2 s . co m
            built.add(child);
        }
    }
    return built;
}

From source file:com.vmware.photon.controller.api.Component.java

/**
 * Translates a collection of Strings into Component Enums.
 *//*  ww  w  .j  ava 2  s.  c om*/
public static Set<Component> fromStrings(Collection<String> values) {

    List<Component> result = Lists.newArrayListWithExpectedSize(values.size());

    for (String value : values) {
        result.add(Component.fromString(value));
    }

    return EnumSet.copyOf(result);
}

From source file:com.cloudera.science.ml.core.formula.Formula.java

public static Formula compile(List<Term> terms, Summary summary) {
    Spec spec = summary.getSpec();/*from   w w  w .j av  a  2s .co m*/
    List<Term> internalTerms = Lists.newArrayList(terms);
    Collections.sort(internalTerms);
    List<CompiledTerm> compiled = Lists.newArrayListWithExpectedSize(terms.size());
    int offset = 0;
    boolean hasIntercept = internalTerms.get(0).isIntercept();
    for (Term t : terms) {
        List<Integer> numerics = Lists.newArrayList();
        List<Integer> categoricals = Lists.newArrayList();
        List<List<String>> hist = Lists.newArrayList();
        for (String field : t) {
            FieldSpec fs = spec.getField(field);
            SummaryStats ss = summary.getStats(fs.position());
            if (ss.isNumeric()) {
                numerics.add(fs.position());
            } else {
                categoricals.add(fs.position());
                hist.add(ss.getLevels());
            }
        }
        compiled.add(new CompiledTerm(numerics, categoricals, hist, offset));
        if (categoricals.isEmpty()) {
            offset++;
        } else {
            int prod = 1;
            for (List<String> h : hist) {
                prod *= h.size();
            }
            offset += prod - (hasIntercept ? 1 : 0);
        }
    }
    return new Formula(compiled, offset, offset > 2 * terms.size(), hasIntercept);
}

From source file:javastory.tools.CollectionUtil.java

/**
 * Copies <code>count</code> items off of list, starting from the beginning.
 * //from  w w  w  .j a v a  2  s.co  m
 * @param <T>
 *            The type of the list.
 * @param list
 *            The list to copy from.
 * @param count
 *            The number of items to copy.
 * @return The copied list.
 */
public static <T> List<T> copyFirst(final List<T> list, final int count) {
    final int size = list.size() < count ? list.size() : count;
    final List<T> ret = Lists.newArrayListWithExpectedSize(size);
    int i = 0;
    for (final T elem : list) {
        ret.add(elem);
        if (i++ > count) {
            break;
        }
    }
    return ret;
}

From source file:org.apache.bookkeeper.server.component.ServerLifecycleComponent.java

public static List<ServerLifecycleComponent> loadServerComponents(String[] componentClassNames,
        BookieConfiguration conf, StatsLogger statsLogger) {
    List<Class<? extends ServerLifecycleComponent>> componentClasses = Lists
            .newArrayListWithExpectedSize(componentClassNames.length);
    for (String componentClsName : componentClassNames) {
        componentClasses.add(ReflectionUtils.forName(componentClsName, ServerLifecycleComponent.class));
    }/*  ww  w.  j  a va  2s . c  o m*/
    return Lists.transform(componentClasses, cls -> newComponent(cls, conf, statsLogger));

}

From source file:com.google.devtools.depan.platform.eclipse.ui.widgets.Selections.java

/**
 * Use only when it is essential to have the elements in order.
 *//*from   w  ww.ja va2 s .c  o  m*/
public static <T> List<T> getSelectionList(ISelection selection, Class<T> type) {
    List<?> choices = getObjects(selection);
    if (choices.isEmpty()) {
        return Collections.emptyList();
    }
    List<T> result = Lists.newArrayListWithExpectedSize(choices.size());
    for (Object item : choices) {
        if (type.isAssignableFrom(item.getClass())) {
            result.add(type.cast(item));
        }
    }
    return result;
}

From source file:org.carrot2.source.pubmed.PubMedSearchHandler.java

public void startDocument() throws SAXException {
    pubMedPrimaryIds = Lists.newArrayListWithExpectedSize(100);
    handlingId = false;// w w  w . j  av a 2s  .com
    id = new StringBuffer();
}