Example usage for com.google.common.base Preconditions checkNotNull

Introduction

In this page you can find the example usage for com.google.common.base Preconditions checkNotNull.

Prototype

public static <T> T checkNotNull(T reference, @Nullable Object errorMessage)

Source Link

Document

Ensures that an object reference passed as a parameter to the calling method is not null.

Usage

From source file:com.github.jeluard.guayaba.lang.reflect.Fields.java

/**
 * @param <T>//from   ww  w .jav  a 2 s .c o  m
 * @param field
 * @param object
 * @return value of specified {@link Field}
 */
public static <T> T get(final Field field, final Object object) {
    Preconditions.checkNotNull(field, "null field");
    Preconditions.checkNotNull(object, "null object");

    if (!field.isAccessible()) {
        field.setAccessible(true);
    }

    try {
        return (T) field.get(object);
    } catch (IllegalAccessException e) {
        //Cannot happen as we force accessibility.
        throw new IllegalStateException(e);
    }
}

From source file:net.awired.visuwall.teamcityclient.DateAdapter.java

public static Date parseDate(String dateToParse) {
    Preconditions.checkNotNull(dateToParse, "dateToParse is mandatory");
    try {//from  w  w w.  jav  a  2  s  .c  o m
        return TEAMCITY_DATE_FORMAT.parse(dateToParse);
    } catch (ParseException e) {
        throw new RuntimeException(e);
    }
}

From source file:com.zaradai.kunzite.optimizer.model.OutputRow.java

public static OutputRow fromSchema(OutputRowSchema schema) {
    Preconditions.checkNotNull(schema, "Must be created with valid schema");

    return new OutputRow(schema);
}

From source file:org.anarres.graphviz.builder.GraphVizUtils.java

/**
 * This supports a one-liner: GraphVizUtils.toGraphVizGraph(object).writeTo(new File(...)).
 *
 * @param object The object to graph./*from w w w  . j a v a 2s . c o m*/
 * @return A newly constructed GraphVizGraph.
 */
@Nonnull
public static GraphVizGraph toGraphVizGraph(@Nonnull GraphVizable object) {
    Preconditions.checkNotNull(object, "GraphVizable object was null.");
    GraphVizGraph graph = new GraphVizGraph();
    object.toGraphViz(graph);
    return graph;
}

From source file:org.opendaylight.lispflowmapping.lisp.util.LispSimpleAddressStringifier.java

public static String getString(Destination dst, SimpleAddress addr) {
    Preconditions.checkNotNull(addr, "address should not be null");

    if (addr.getIpAddress() != null) {
        if (addr.getIpAddress().getIpv4Address() != null) {
            return addr.getIpAddress().getIpv4Address().getValue();
        } else if (addr.getIpAddress().getIpv6Address() != null) {
            return addr.getIpAddress().getIpv6Address().getValue();
        }//  ww w .j  a v  a2s . c o m
    } else if (addr.getIpPrefix() != null) {
        if (addr.getIpPrefix().getIpv4Prefix() != null) {
            return addr.getIpPrefix().getIpv4Prefix().getValue();
        } else if (addr.getIpPrefix().getIpv6Prefix() != null) {
            return addr.getIpPrefix().getIpv6Prefix().getValue();
        }
    } else if (addr.getMacAddress() != null) {
        return addr.getMacAddress().getValue();
    } else if (addr.getDistinguishedNameType() != null) {
        return (addr.getDistinguishedNameType().getValue());
    } else if (addr.getAsNumber() != null) {
        return "AS" + addr.getAsNumber().getValue();
    }

    return null;
}

From source file:com.facebook.presto.sql.planner.DeterminismEvaluator.java

public static boolean isDeterministic(Expression expression) {
    Preconditions.checkNotNull(expression, "expression is null");

    AtomicBoolean deterministic = new AtomicBoolean(true);
    new Visitor().process(expression, deterministic);
    return deterministic.get();
}

From source file:com.nesscomputing.migratory.maven.ConfigureLog4j.java

public static void start(final AbstractMojo mojo) {
    LogManager.resetConfiguration();

    final URL configFile = ConfigureLog4j.class.getResource("/log4j-maven.xml");
    Preconditions.checkNotNull(configFile, "no log4j-maven.xml file found!");

    DOMConfigurator.configure(configFile);
    MavenLogAppender.startPluginLog(mojo);

}

From source file:com.github.jeluard.guayaba.base.Optionals.java

/**
 * @param <T>//from  w ww .j ava  2s .co m
 * @param optional
 * @return an {@link Optional} returning encapsulated {@link Optional}
 */
public static <T> Optional<T> flatten(final Optional<Optional<T>> optional) {
    Preconditions.checkNotNull(optional, "null optional");

    if (!optional.isPresent()) {
        return Optional.absent();
    }

    return optional.get();
}

From source file:com.zaradai.kunzite.optimizer.model.InputRow.java

public static InputRow fromSchema(InputRowSchema schema) {
    Preconditions.checkNotNull(schema, "Input row needs valid schema to build");

    return new InputRow(schema);
}

From source file:org.impressivecode.depress.common.TransformationUtils.java

public static String filePath2JavaClass(final String fileName) {
    Preconditions.checkNotNull(fileName, "FileName has to be set");
    return fileName.replaceAll("\\\\", ".").replaceAll("/", ".").replace(".java", "");
}