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

Introduction

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

Prototype

public static void checkState(boolean expression, @Nullable Object errorMessage)

Source Link

Document

Ensures the truth of an expression involving the state of the calling instance, but not involving any parameters to the calling method.

Usage

From source file:org.basepom.mojo.propertyhelper.macros.DemoMacro.java

@Override
public Optional<String> getValue(@Nonnull final MacroDefinition macroDefinition,
        @Nonnull final ValueProvider valueProvider, @Nonnull final AbstractPropertyHelperMojo mojo) {
    Preconditions.checkState(mojo != null, "inserted mojo is null!");

    final String type = Objects.firstNonNull(macroDefinition.getProperties().get("type"), "static");
    if ("static".equals(type)) {
        return Optional.of("static-value");
    } else if ("property".equals(type)) {
        return valueProvider.getValue();
    } else {//  w w  w  .java 2s.c o m
        return Optional.fromNullable(macroDefinition.getProperties().get("value"));
    }
}

From source file:org.opendaylight.controller.datastore.internal.ClusteredDataStoreManager.java

@Override
public DataCommitTransaction<InstanceIdentifier<? extends Object>, Object> requestCommit(
        DataModification<InstanceIdentifier<? extends Object>, Object> modification) {
    Preconditions.checkState(clusteredDataStore != null, "clusteredDataStore cannot be null");
    return clusteredDataStore.requestCommit(modification);
}

From source file:org.opendaylight.controller.yang.parser.util.TopologicalSort.java

private static void detectCycles(Set<Node> nodes) {
    // Detect cycles
    boolean cycle = false;
    Node cycledNode = null;/*from  w w w . java  2s .  c  om*/

    for (Node n : nodes) {
        if (!n.getOutEdges().isEmpty()) {
            cycle = true;
            cycledNode = n;
            break;
        }
    }
    Preconditions.checkState(cycle == false, "Cycle detected in graph around node: " + cycledNode);
}

From source file:com.google.enterprise.adaptor.secmgr.saml.GroupImpl.java

@Override
public String getName() {
    Preconditions.checkState(name != null, "Name must be non-null");
    return name;
}

From source file:com.continuuity.weave.internal.zookeeper.KillZKSession.java

/**
 * Kills a Zookeeper client to simulate failure scenarious during testing.
 * Callee will provide the amount of time to wait before it's considered failure
 * to kill a client./*from w  ww .jav  a2  s  .c om*/
 *
 * @param client that needs to be killed.
 * @param connectionString of Quorum
 * @param maxMs time in millisecond specifying the max time to kill a client.
 * @throws IOException When there is IO error
 * @throws InterruptedException When call has been interrupted.
 */
public static void kill(ZooKeeper client, String connectionString, int maxMs)
        throws IOException, InterruptedException {
    final CountDownLatch latch = new CountDownLatch(1);
    ZooKeeper zk = new ZooKeeper(connectionString, maxMs, new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            if (event.getState() == Event.KeeperState.SyncConnected) {
                latch.countDown();
            }
        }
    }, client.getSessionId(), client.getSessionPasswd());

    try {
        Preconditions.checkState(latch.await(maxMs, TimeUnit.MILLISECONDS), "Fail to kill ZK connection.");
    } finally {
        zk.close();
    }
}

From source file:edu.umn.msi.tropix.common.jobqueue.deployer.DeployerProperties.java

public String get() {
    Preconditions.checkState(properties.size() == 1,
            "Expected to have exactly one property when get() is called, actual number " + properties.size());
    return apply(Iterables.getOnlyElement(properties.keySet()));
}

From source file:org.opendaylight.controller.netconf.confignetconfconnector.mapping.attributes.fromxml.ObjectNameAttributeReadingStrategy.java

@Override
AttributeConfigElement readElementHook(List<XmlElement> configNodes) throws NetconfDocumentedException {

    XmlElement firstChild = configNodes.get(0);
    Preconditions.checkState(configNodes.size() == 1,
            "This element should be present only once " + firstChild + " but was " + configNodes.size());

    Preconditions.checkNotNull(firstChild, "Element %s should be present", firstChild);
    return AttributeConfigElement.create(getNullableDefault(), resolve(firstChild));
}

From source file:com.facebook.buck.core.cell.impl.RootCellFactory.java

public static Cell create(CellProvider cellProvider, CellPathResolver rootCellCellPathResolver,
        CellPathResolver rootCellPathResolver, ProjectFilesystem rootFilesystem,
        BuckModuleManager moduleManager, PluginManager pluginManager, BuckConfig rootConfig,
        ImmutableMap<String, String> environment, ProcessExecutor processExecutor,
        ExecutableFinder executableFinder) {
    Preconditions.checkState(
            !rootCellCellPathResolver.getCanonicalCellName(rootFilesystem.getRootPath()).isPresent(),
            "Root cell should be nameless");
    RuleKeyConfiguration ruleKeyConfiguration = ConfigRuleKeyConfigurationFactory.create(rootConfig,
            moduleManager);/*  w  ww  .  j a  v a 2s. co  m*/
    ToolchainProvider toolchainProvider = new DefaultToolchainProvider(pluginManager, environment, rootConfig,
            rootFilesystem, processExecutor, executableFinder, ruleKeyConfiguration);
    return ImmutableCell.of(rootCellCellPathResolver.getKnownRoots(), Optional.empty(), rootFilesystem,
            rootConfig, cellProvider, toolchainProvider, ruleKeyConfiguration, rootCellPathResolver);
}

From source file:org.xacml4j.spring.DecisionCombiningAlgorithmProviderBean.java

public void setClass(Class<?> clazz) {
    Preconditions.checkNotNull(clazz);//from w w  w  .  j a v a  2 s  .  com
    Preconditions.checkState(providerInstance == null,
            "Either provider instance or class can be specified, NOT both");
    this.providerClass = clazz;
}

From source file:org.sonar.javascript.cfg.ForwardingBlock.java

@Override
public MutableBlock successor() {
    Preconditions.checkState(successor != null, "No successor was set on " + this);
    return successor;
}