com.twitter.finagle.common.base.MorePreconditions.java Source code

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Here is the source code for com.twitter.finagle.common.base.MorePreconditions.java

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// =================================================================================================
// Copyright 2011 Twitter, Inc.
// -------------------------------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this work except in compliance with the License.
// You may obtain a copy of the License in the LICENSE file, or at:
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// =================================================================================================

package com.twitter.finagle.common.base;

import com.google.common.base.Preconditions;

import org.apache.commons.lang.StringUtils;

/**
 * A utility helpful in concisely checking preconditions on arguments.  This utility is a complement
 * to {@link com.google.common.base.Preconditions}.
 *
 * @author John Sirois
 */
public final class MorePreconditions {

    private static final String ARG_NOT_BLANK_MSG = "Argument cannot be blank";

    private MorePreconditions() {
        // utility
    }

    /**
     * Checks that a string is both non-null and non-empty.
     *
     * @see #checkNotBlank(String, String, Object...)
     */
    public static String checkNotBlank(String argument) {
        Preconditions.checkNotNull(argument, ARG_NOT_BLANK_MSG);
        Preconditions.checkArgument(!StringUtils.isBlank(argument), ARG_NOT_BLANK_MSG);
        return argument;
    }
}