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Merge pull request #148 from powerflows/develop
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| # Others | ||
| target/ | ||
| .settings/ | ||
| bin/ | ||
| bin/ | ||
| /.attach_pid* | ||
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66 changes: 66 additions & 0 deletions
66
.../dmn/engine/evaluator/expression/provider/DefaultExpressionEvaluationProviderFactory.java
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| @@ -0,0 +1,66 @@ | ||
| /* | ||
| * Copyright (c) 2018-present PowerFlows.org - all rights reserved. | ||
| * | ||
| * 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. | ||
| */ | ||
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| package org.powerflows.dmn.engine.evaluator.expression.provider; | ||
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| import lombok.extern.slf4j.Slf4j; | ||
| import org.powerflows.dmn.engine.model.decision.expression.ExpressionType; | ||
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| import java.util.EnumMap; | ||
| import java.util.Optional; | ||
| import java.util.ServiceLoader; | ||
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| @Slf4j | ||
| public class DefaultExpressionEvaluationProviderFactory { | ||
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| private static final ServiceLoader<ExpressionEvaluationProviderFactory> serviceLoader = ServiceLoader.load(ExpressionEvaluationProviderFactory.class); | ||
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| private final EnumMap<ExpressionType, ExpressionEvaluationProviderFactory> factories = new EnumMap<>(ExpressionType.class); | ||
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| private final EnumMap<ExpressionType, ExpressionEvaluationProvider> providers = new EnumMap<>(ExpressionType.class); | ||
| private final ExpressionEvaluationConfiguration configuration; | ||
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| public DefaultExpressionEvaluationProviderFactory() { | ||
| this(ExpressionEvaluationConfiguration.simpleConfiguration()); | ||
| } | ||
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| public DefaultExpressionEvaluationProviderFactory(final ExpressionEvaluationConfiguration configuration) { | ||
| this.configuration = configuration; | ||
| serviceLoader.forEach(provider -> | ||
| provider.supportedExpressionTypes() | ||
| .forEach(type -> { | ||
| log.debug("Found ExpressionEvaluationProvider for type {} - {}", type, provider); | ||
| factories.put(type, provider); | ||
| } | ||
| ) | ||
| ); | ||
| } | ||
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| public ExpressionEvaluationProvider getInstance(final ExpressionType expressionType) { | ||
| final ExpressionEvaluationProvider expressionEvaluationProvider = providers.computeIfAbsent(expressionType, key -> Optional | ||
| .ofNullable(factories.get(key)) | ||
| .map(factory -> factory.createProvider(configuration)) | ||
| .orElse(null) | ||
| ); | ||
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| if (expressionEvaluationProvider == null) { | ||
| throw new IllegalArgumentException("Unknown expression type " + expressionType); | ||
| } | ||
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| return expressionEvaluationProvider; | ||
| } | ||
| } |
41 changes: 41 additions & 0 deletions
41
...owerflows/dmn/engine/evaluator/expression/provider/ExpressionEvaluationConfiguration.java
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| @@ -0,0 +1,41 @@ | ||
| /* | ||
| * Copyright (c) 2018-present PowerFlows.org - all rights reserved. | ||
| * | ||
| * 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 org.powerflows.dmn.engine.evaluator.expression.provider; | ||
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| import lombok.Builder; | ||
| import lombok.Getter; | ||
| import org.powerflows.dmn.engine.evaluator.expression.provider.binding.MethodBinding; | ||
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| import javax.script.ScriptEngineManager; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
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| @Getter | ||
| @Builder | ||
| public class ExpressionEvaluationConfiguration { | ||
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| private final List<MethodBinding> methodBinding; | ||
| private final ScriptEngineManager scriptEngineManager; | ||
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| private ExpressionEvaluationConfiguration(final List<MethodBinding> methodBinding, final ScriptEngineManager scriptEngineManager) { | ||
| this.methodBinding = methodBinding == null ? Collections.emptyList() : methodBinding; | ||
| this.scriptEngineManager = scriptEngineManager == null ? new ScriptEngineManager() : scriptEngineManager; | ||
| } | ||
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| public static ExpressionEvaluationConfiguration simpleConfiguration() { | ||
| return ExpressionEvaluationConfiguration.builder().build(); | ||
| } | ||
| } |
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