Example usage for com.google.common.base Functions forMap

Introduction

In this page you can find the example usage for com.google.common.base Functions forMap.

Prototype

public static <K, V> Function<K, V> forMap(Map<K, ? extends V> map, @Nullable V defaultValue) 

Source Link

Document

Returns a function which performs a map lookup with a default value.

Usage

From source file:com.github.mike10004.demo.infinitescroll.ItemServlet.java

static Function<String, String> newParamMapFunction(HttpServletRequest request) {
    return Functions.compose(new Function<String[], String>() {
        @Override//from  w w  w .j  a va 2s .c  o  m
        public String apply(String[] input) {
            return input != null && input.length > 0 ? input[0] : null;
        }
    }, Functions.forMap(request.getParameterMap(), null));
}

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From source file:de.comci.bitmap.SortDirection.java

<K, V> Comparator order(Map<K, ? extends V> map) {
    return order.onResultOf(Functions.forMap(map, null));
}

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From source file:org.jclouds.openstack.nova.domain.Resource.java

public URI getURI() {
    for (Map<String, String> linkProperties : links) {
        try {/* w  w  w  .  j  a v a  2s . co  m*/
            if (!Functions.forMap(linkProperties, "").apply("rel").equals("bookmark"))
                continue;
            if (!Functions.forMap(linkProperties, "").apply("type").contains("json"))
                continue;

            return new URI(linkProperties.get("href"));
        } catch (URISyntaxException e) {
            throw new RuntimeException(e);
        }
    }

    throw new IllegalStateException("URI is not available");
}

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From source file:org.jdag.example.wc.CountWords.java

/**
 * {@inheritDoc}//  www . java 2  s  .  c o m
 */
@Override
public void process(Input<String> input, Output<Map<String, Integer>> output) {
    Map<String, Integer> wordcountMap = new HashMap<String, Integer>();
    com.google.common.base.Function<String, Integer> lookupFunction = Functions.forMap(wordcountMap, 0);
    for (String line : new IteratorWrapper<String>(input.getIterator())) {
        String[] words = line.split(" ");
        for (String word : words) {
            int count = lookupFunction.apply(word);
            wordcountMap.put(word, ++count);
        }
    }
    output.write(wordcountMap);
    output.done();
}

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From source file:org.jdag.example.wc.WordCountMerger.java

/**
 * {@inheritDoc}//from   w w w.j  a  v  a 2 s.c o  m
 */
@Override
public void merge(List<Input<Map<String, Integer>>> shards, Output<Map<String, Integer>> output) {
    Map<String, Integer> resultMap = new HashMap<String, Integer>();
    com.google.common.base.Function<String, Integer> lookupFunction = Functions.forMap(resultMap, 0);

    for (Input<Map<String, Integer>> shard : shards) {
        Map<String, Integer> splitWcMap = shard.getIterator().next();
        for (Map.Entry<String, Integer> entry : splitWcMap.entrySet()) {
            resultMap.put(entry.getKey(), lookupFunction.apply(entry.getKey()) + entry.getValue());
        }
    }
    output.write(resultMap);
    output.done();
}

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From source file:com.twitter.common.net.UrlResolverUtil.java

UrlResolverUtil(Map<String, String> hostToUserAgent) {
    this(Functions.compose(Functions.forMap(checkNotBlank(hostToUserAgent), DEFAULT_USER_AGENT),
            new Function<URL, String>() {
                @Override/*from   w w w . j a  v a2 s.co m*/
                public String apply(URL url) {
                    return url.getHost();
                }
            }));
}

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From source file:com.github.jonross.seq4j.SeqMisc.java

/**
 * Wraps {@link Functions#forMap(Map, Object)}; returns a function that looks up its
 * argument in a map, using the given default value if the map does not contain that key.
 *///from w w  w.j ava 2  s  .  com

public static <K, V> Function<K, V> lookup(Map<K, ? extends V> map, V defaultValue) {
    return Functions.forMap(map, defaultValue);
}

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From source file:org.sonar.plugins.pmd.PmdTemplate.java

private static String normalize(String version) {
    return Functions.forMap(JAVA_VERSIONS, version).apply(version);
}

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From source file:eu.thebluemountain.customers.dctm.brownbag.badcontentslister.db.DCReader.java

/**
 * The method returns the function which, given a format's name,
 * returns the format's extension.//  w w  w  .j  a v  a  2s . c o  m
 * @param jdbc provides access to the source
 * @return the function which, given a format name, returns the matching
 * extension if any.
 */
private static Function<String, String> makeExtensions(JDBCConnection jdbc) {
    String sql = "SELECT name, dos_extension " + "FROM dm_format_s WHERE "
            + "(dos_extension IS NOT NULL AND dos_extension <> ' ')";
    try {
        try (Statement stmt = jdbc.connection.createStatement(ResultSet.TYPE_FORWARD_ONLY,
                ResultSet.CONCUR_READ_ONLY); ResultSet rs = stmt.executeQuery(sql)) {
            ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
            while (rs.next()) {
                String name = rs.getString(1);
                String ext = "." + rs.getString(2);
                builder.put(name, ext);
            }
            return Functions.forMap(builder.build(), null);
        }
    } catch (SQLException e) {
        throw new IllegalStateException(e);
    }
}

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From source file:org.apache.tez.analyzer.plugins.VertexLevelCriticalPathAnalyzer.java

private static Map<String, Long> sortByValues(Map<String, Long> result) {
    //Sort result by time in reverse order
    final Ordering<String> reversValueOrdering = Ordering.natural().reverse().nullsLast()
            .onResultOf(Functions.forMap(result, null));
    Map<String, Long> orderedMap = ImmutableSortedMap.copyOf(result, reversValueOrdering);
    return orderedMap;
}

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