org.apache.whirr.service.puppet.predicates.PuppetPredicates.java Source code

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Here is the source code for org.apache.whirr.service.puppet.predicates.PuppetPredicates.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.apache.whirr.service.puppet.predicates;

import static org.apache.whirr.service.puppet.PuppetConstants.MODULE_SOURCE_SUBKEY;
import static org.apache.whirr.service.puppet.PuppetConstants.PUPPET;
import static org.apache.whirr.service.puppet.PuppetConstants.PUPPET_ROLE_PREFIX;

import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import com.google.common.collect.Iterables;

/**
 * 
 */
public class PuppetPredicates {
    public static Predicate<String> isFirstPuppetRoleIn(final Iterable<String> roles) {
        return new Predicate<String>() {

            @Override
            public boolean apply(String arg0) {
                return Iterables
                        .get(Iterables.filter(roles, Predicates.containsPattern("^" + PUPPET_ROLE_PREFIX + arg0)),
                                0)
                        .equals(PUPPET_ROLE_PREFIX + arg0);
            }

            @Override
            public String toString() {
                return "isFirstPuppetRoleIn(" + roles + ")";

            }
        };

    }

    public static Predicate<CharSequence> isPuppetRole() {
        return Predicates.containsPattern("^" + PUPPET_ROLE_PREFIX);
    }

    public static Predicate<String> isLastPuppetRoleIn(final Iterable<String> roles) {
        return new Predicate<String>() {

            @Override
            public boolean apply(String arg0) {
                return Iterables
                        .getLast(Iterables.filter(roles,
                                Predicates.containsPattern("^" + PUPPET_ROLE_PREFIX + arg0)))
                        .equals(PUPPET_ROLE_PREFIX + arg0);
            }

            @Override
            public String toString() {
                return "isLastPuppetRoleIn(" + roles + ")";

            }
        };

    }

    public static Predicate<String> isModuleSubKey(final String module) {
        return new Predicate<String>() {

            @Override
            public boolean apply(String arg0) {
                return arg0.startsWith(PUPPET + "." + module + "." + MODULE_SOURCE_SUBKEY);
            }

            @Override
            public String toString() {
                return "isModuleSubKey(" + module + ")";

            }
        };
    }
}