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 String errorMessageTemplate,
        @Nullable Object... errorMessageArgs) 

Source Link

Document

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

Usage

From source file:org.bin01.db.verifier.Types.java

public static <A, B extends A> B checkType(A value, Class<B> target, String name) {
    Preconditions.checkNotNull(value, "%s is null", name);
    Preconditions.checkArgument(target.isInstance(value), "%s must be of type %s, not %s", name,
            target.getName(), value.getClass().getName());
    return target.cast(value);
}

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From source file:org.locationtech.geogig.web.api.RESTUtils.java

public static RepositoryProvider repositoryProvider(Request request) {
    Object provider = request.getAttributes().get(RepositoryProvider.KEY);
    Preconditions.checkNotNull(provider, "No RepositoryProvider found in request attributes under the key %s",
            RepositoryProvider.KEY);/* www.  j  a  va 2 s.  com*/
    Preconditions.checkState(provider instanceof RepositoryProvider,
            "Request attribute %s is not of type RepositoryProvider: %s", RepositoryProvider.KEY,
            provider.getClass());
    return (RepositoryProvider) provider;
}

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