01 /*
02 * SPDX-License-Identifier: Apache-2.0
03 *
04 * Copyright 2008-2017 the original author or authors.
05 *
06 * Licensed under the Apache License, Version 2.0 (the "License");
07 * you may not use this file except in compliance with the License.
08 * You may obtain a copy of the License at
09 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.codehaus.griffon.runtime.core.resources;
19
20 import griffon.core.resources.NoSuchResourceException;
21 import griffon.core.resources.ResourceResolver;
22
23 import javax.annotation.Nonnull;
24 import java.util.Collection;
25 import java.util.Locale;
26
27 import static griffon.util.GriffonClassUtils.requireNonEmpty;
28 import static griffon.util.GriffonNameUtils.requireNonBlank;
29 import static java.util.Objects.requireNonNull;
30
31 /**
32 * @author Andres Almiray
33 * @since 2.0.0
34 */
35 public class CompositeResourceResolver extends AbstractResourceResolver {
36 private final ResourceResolver[] resourceResolvers;
37
38 public CompositeResourceResolver(@Nonnull Collection<ResourceResolver> resourceResolvers) {
39 this(toResourceResolverArray(resourceResolvers));
40 }
41
42 public CompositeResourceResolver(@Nonnull ResourceResolver[] resourceResolvers) {
43 this.resourceResolvers = requireNonNull(resourceResolvers, "Argument 'resourceResolvers' must not be null");
44 }
45
46 private static ResourceResolver[] toResourceResolverArray(@Nonnull Collection<ResourceResolver> resourceResolvers) {
47 requireNonNull(resourceResolvers, "Argument 'resourceResolvers' must not be null");
48 requireNonEmpty(resourceResolvers, "Argument 'resourceResolvers' must not be empty");
49 return resourceResolvers.toArray(new ResourceResolver[resourceResolvers.size()]);
50 }
51
52 @Nonnull
53 @Override
54 protected Object doResolveResourceValue(@Nonnull String key, @Nonnull Locale locale) throws NoSuchResourceException {
55 requireNonBlank(key, ERROR_KEY_BLANK);
56 requireNonNull(locale, ERROR_LOCALE_NULL);
57 for (ResourceResolver resourceResolver : resourceResolvers) {
58 try {
59 return resourceResolver.resolveResourceValue(key, locale);
60 } catch (NoSuchResourceException nsre) {
61 // ignore
62 }
63 }
64 throw new NoSuchResourceException(key, locale);
65 }
66 }
|