| 1 | /** |
| 2 | * Licensed to jclouds, Inc. (jclouds) under one or more |
| 3 | * contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. jclouds licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.jclouds.compute.predicates; |
| 20 | |
| 21 | import static com.google.common.base.Preconditions.checkNotNull; |
| 22 | |
| 23 | import java.util.Set; |
| 24 | |
| 25 | import org.jclouds.javax.annotation.Nullable; |
| 26 | |
| 27 | import org.jclouds.compute.domain.Image; |
| 28 | |
| 29 | import com.google.common.base.Predicate; |
| 30 | import com.google.common.base.Predicates; |
| 31 | import com.google.common.collect.Sets; |
| 32 | |
| 33 | /** |
| 34 | * Container for image filters (predicates). |
| 35 | * |
| 36 | * This class has static methods that create customized predicates to use with |
| 37 | * {@link org.jclouds.compute.ComputeService}. |
| 38 | * |
| 39 | * @author Adrian Cole |
| 40 | */ |
| 41 | public class ImagePredicates { |
| 42 | private static final class Is64BitPredicate implements Predicate<Image> { |
| 43 | @Override |
| 44 | public boolean apply(Image image) { |
| 45 | return image.getOperatingSystem().is64Bit(); |
| 46 | } |
| 47 | |
| 48 | @Override |
| 49 | public String toString() { |
| 50 | return "is64Bit()"; |
| 51 | } |
| 52 | |
| 53 | @Override |
| 54 | public boolean equals(@Nullable Object obj) { |
| 55 | return (obj instanceof Is64BitPredicate); |
| 56 | } |
| 57 | |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * evaluates true if the Image id is in the supplied set |
| 62 | * |
| 63 | * @param ids |
| 64 | * ids of the images |
| 65 | * @return predicate |
| 66 | */ |
| 67 | public static Predicate<Image> idIn(Iterable<String> ids) { |
| 68 | checkNotNull(ids, "ids must be defined"); |
| 69 | final Set<String> search = Sets.newHashSet(ids); |
| 70 | return new Predicate<Image>() { |
| 71 | @Override |
| 72 | public boolean apply(Image image) { |
| 73 | return search.contains(image.getId()); |
| 74 | } |
| 75 | |
| 76 | @Override |
| 77 | public String toString() { |
| 78 | return "idIn(" + search + ")"; |
| 79 | } |
| 80 | }; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * evaluates true if the Image metadata contains the following values |
| 85 | * |
| 86 | * @param key |
| 87 | * key in Image#getUserMetadata |
| 88 | * @param value |
| 89 | * value in Image#getUserMetadata |
| 90 | * @return predicate |
| 91 | */ |
| 92 | public static Predicate<Image> userMetadataContains(final String key, final String value) { |
| 93 | checkNotNull(key, "key must be defined"); |
| 94 | checkNotNull(value, "value must be defined"); |
| 95 | return new Predicate<Image>() { |
| 96 | @Override |
| 97 | public boolean apply(Image image) { |
| 98 | return value.equals(image.getUserMetadata().get(key)); |
| 99 | } |
| 100 | |
| 101 | @Override |
| 102 | public String toString() { |
| 103 | return "metadataContains(" + key +", "+value + ")"; |
| 104 | } |
| 105 | }; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * evaluates true if the Image |
| 110 | * |
| 111 | * @param ids |
| 112 | * ids of the images |
| 113 | * @return predicate |
| 114 | */ |
| 115 | public static Predicate<Image> idEquals(final String id) { |
| 116 | checkNotNull(id, "id must be defined"); |
| 117 | return new Predicate<Image>() { |
| 118 | @Override |
| 119 | public boolean apply(Image image) { |
| 120 | return id.equals(image.getId()); |
| 121 | } |
| 122 | |
| 123 | @Override |
| 124 | public String toString() { |
| 125 | return "idEquals(" + id + ")"; |
| 126 | } |
| 127 | }; |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * return true if this is a 64bit image. |
| 132 | */ |
| 133 | public static Predicate<Image> is64Bit() { |
| 134 | return new Is64BitPredicate(); |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * return everything. |
| 139 | */ |
| 140 | public static Predicate<Image> any() { |
| 141 | return Predicates.<Image> alwaysTrue(); |
| 142 | } |
| 143 | |
| 144 | } |