org.jclouds.chef.util.ChefUtils.java Source code

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Here is the source code for org.jclouds.chef.util.ChefUtils.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License 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 org.jclouds.chef.util;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.Date;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.jclouds.domain.JsonBall;
import org.jclouds.ohai.Automatic;

import com.google.common.base.Predicate;
import com.google.common.base.Supplier;
import com.google.common.collect.Iterables;
import com.google.inject.Binder;
import com.google.inject.TypeLiteral;
import com.google.inject.multibindings.MapBinder;

public class ChefUtils {

    public static Date fromOhaiTime(JsonBall ohaiDate) {
        return new Date(Long.parseLong(checkNotNull(ohaiDate, "ohaiDate").toString().replaceAll("\\.[0-9]*$", "")));
    }

    public static JsonBall toOhaiTime(long millis) {
        return new JsonBall(millis + "");
    }

    public static MapBinder<String, Supplier<JsonBall>> ohaiAutomaticAttributeBinder(Binder binder) {
        MapBinder<String, Supplier<JsonBall>> mapbinder = MapBinder.newMapBinder(binder, new TypeLiteral<String>() {
        }, new TypeLiteral<Supplier<JsonBall>>() {
        }, Automatic.class);
        return mapbinder;
    }

    /**
     * 
     * @return NoSuchElementException if no element in the runList is a role.
     */
    public static String findRoleInRunList(List<String> runList) {
        final Pattern pattern = Pattern.compile("^role\\[(.*)\\]$");
        String roleToParse = Iterables.find(runList, new Predicate<String>() {

            @Override
            public boolean apply(String input) {
                return pattern.matcher(input).matches();
            }

        });
        Matcher matcher = pattern.matcher(roleToParse);
        matcher.find();
        return matcher.group(1);
    }
}