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Support conditional blocks in class based resource bundles. Fixes #212
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139 changes: 139 additions & 0 deletions
139
subprojects/griffon-core/src/main/java/griffon/util/ResourceBundleReader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| /* | ||
| * Copyright 2017 the original author or authors. | ||
| * | ||
| * Licensed 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 griffon.util; | ||
|
|
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| import griffon.core.env.Environment; | ||
| import griffon.core.env.Metadata; | ||
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| import javax.annotation.Nonnull; | ||
| import javax.annotation.Nullable; | ||
| import javax.inject.Inject; | ||
| import java.util.Collections; | ||
| import java.util.LinkedHashMap; | ||
| import java.util.Map; | ||
| import java.util.ResourceBundle; | ||
|
|
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| import static griffon.util.GriffonNameUtils.isBlank; | ||
| import static java.util.Objects.requireNonNull; | ||
|
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| /** | ||
| * @author Andres Almiray | ||
| * @since 2.10.0 | ||
| */ | ||
| public class ResourceBundleReader { | ||
| private static final String ENVIRONMENTS_METHOD = "environments"; | ||
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| private final Map<String, String> conditionValues = new LinkedHashMap<>(); | ||
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| public static class Provider implements javax.inject.Provider<ResourceBundleReader> { | ||
| @Inject private Metadata metadata; | ||
| @Inject private Environment environment; | ||
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| @Override | ||
| public ResourceBundleReader get() { | ||
| ResourceBundleReader propertiesReader = new ResourceBundleReader(); | ||
| propertiesReader.registerConditionalBlock("environments", environment.getName()); | ||
| propertiesReader.registerConditionalBlock("projects", metadata.getApplicationName()); | ||
| propertiesReader.registerConditionalBlock("platforms", GriffonApplicationUtils.getPlatform()); | ||
| return propertiesReader; | ||
| } | ||
| } | ||
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| public void registerConditionalBlock(@Nullable String blockName, @Nullable String blockValue) { | ||
| if (!isBlank(blockName)) { | ||
| if (isBlank(blockValue)) { | ||
| conditionValues.remove(blockName); | ||
| } else { | ||
| conditionValues.put(blockName, blockValue); | ||
| } | ||
| } | ||
| } | ||
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| @Nonnull | ||
| public Map<String, String> getConditionalBlockValues() { | ||
| return Collections.unmodifiableMap(conditionValues); | ||
| } | ||
|
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| @Nonnull | ||
| public String getEnvironment() { | ||
| return conditionValues.get(ENVIRONMENTS_METHOD); | ||
| } | ||
|
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| public void setEnvironment(String environment) { | ||
| conditionValues.put(ENVIRONMENTS_METHOD, environment); | ||
| } | ||
|
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| @Nonnull | ||
| public ResourceBundle read(final @Nonnull ResourceBundle bundle) { | ||
| requireNonNull(bundle, "Argument 'bundle' must not be null"); | ||
| return new AbstractMapResourceBundle() { | ||
| @Override | ||
| protected void initialize(@Nonnull Map<String, Object> entries) { | ||
| entries.putAll(processBundle(bundle)); | ||
| } | ||
| }; | ||
| } | ||
|
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| @Nonnull | ||
| protected Map<String, Object> processBundle(@Nonnull ResourceBundle input) { | ||
| Map<String, Object> output = new LinkedHashMap<>(); | ||
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| for (String key : input.keySet()) { | ||
| ConditionalBlockMatch match = resolveConditionalBlockMatch(key); | ||
| if (match != null) { | ||
| if (match.key != null) { | ||
| output.put(match.key, input.getObject(key)); | ||
| } | ||
| } else { | ||
| output.put(key, input.getObject(key)); | ||
| } | ||
| } | ||
|
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| return output; | ||
| } | ||
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| @Nullable | ||
| private ConditionalBlockMatch resolveConditionalBlockMatch(@Nonnull String key) { | ||
| for (Map.Entry<String, String> e : conditionValues.entrySet()) { | ||
| String blockName = e.getKey(); | ||
| if (!key.startsWith(blockName + ".")) { | ||
| continue; | ||
| } | ||
|
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| String prefix = blockName + "." + e.getValue() + "."; | ||
| if (key.startsWith(prefix)) { | ||
| String subkey = key.substring(prefix.length()); | ||
| ConditionalBlockMatch match = resolveConditionalBlockMatch(subkey); | ||
| if (match == null) { | ||
| match = new ConditionalBlockMatch(subkey); | ||
| } | ||
| return match; | ||
| } else { | ||
| return new ConditionalBlockMatch(null); | ||
| } | ||
| } | ||
|
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| return null; | ||
| } | ||
|
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| private static class ConditionalBlockMatch { | ||
| public final String key; | ||
|
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| private ConditionalBlockMatch(String key) { | ||
| this.key = key; | ||
| } | ||
| } | ||
| } |
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