| /* |
| * 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.uima.fit.util; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.Field; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import org.apache.uima.UIMAFramework; |
| import org.apache.uima.resource.ResourceInitializationException; |
| import org.apache.uima.resource.ResourceManager; |
| import org.apache.uima.resource.impl.ResourceManager_impl; |
| import org.apache.uima.resource.metadata.ResourceManagerConfiguration; |
| import org.apache.uima.util.Level; |
| |
| /** |
| * <b>EXPERIMENTAL CODE</b> |
| * <p> |
| * Simple {@link ResourceManager} allowing for direct injection of Java objects into UIMA components |
| * as external resources. |
| * </p> |
| * <p> |
| * This implementation uses a simple map to look up an Java object by key. If any component using |
| * this resource manager declares an external resource by the given key, the Java object will be |
| * bound to that external resource. |
| * <p> |
| * Example: |
| * </p> |
| * <blockquote> |
| * |
| * <pre> |
| * class MyComponent extends JCasAnnotator_ImplBase { |
| * static final String RES_INJECTED_POJO = "InjectedPojo"; |
| * {@code @ExternalResource(key = RES_INJECTED_POJO)} |
| * private String injectedString; |
| * |
| * public void process(JCas aJCas) throws AnalysisEngineProcessException { |
| * ... |
| * } |
| * } |
| * </pre> |
| * |
| * </blockquote> |
| * |
| * Per default it is necessary to explicitly bind a objects from the external context to external |
| * resource keys used by the UIMA component: <blockquote> |
| * |
| * <pre> |
| * Map<String, Object> context = new HashMap<String, Object>(); |
| * context("myString", "Just an injected POJO"); |
| * |
| * SimpleNamedResourceManager resMgr = new SimpleNamedResourceManager(); |
| * resMgr.setExternalContext(externalContext); |
| * |
| * AnalysisEngineDescription desc = createPrimitiveDescription(MyComponent.class); |
| * bindExternalResource(desc, MyComponent.RES_INJECTED_POJO, "myString"); |
| * AnalysisEngine ae = UIMAFramework.produceAnalysisEngine(desc, resMgr, null); |
| * </pre> |
| * |
| * </blockquote> |
| * |
| * With autowireing enabled, an explicit binding is not necessary: <blockquote> |
| * |
| * <pre> |
| * Map<String, Object> context = new HashMap<String, Object>(); |
| * context(MyComponent.RES_INJECTED_POJO, "Just an injected POJO"); |
| * |
| * SimpleNamedResourceManager resMgr = new SimpleNamedResourceManager(); |
| * resMgr.setAutoWireEnabled(true); |
| * resMgr.setExternalContext(externalContext); |
| * |
| * AnalysisEngineDescription desc = createPrimitiveDescription(MyComponent.class); |
| * AnalysisEngine ae = UIMAFramework.produceAnalysisEngine(desc, resMgr, null); |
| * </pre> |
| * |
| * </blockquote> |
| * |
| */ |
| public class SimpleNamedResourceManager extends ResourceManager_impl { |
| private Map<String, Object> externalContext; |
| |
| private boolean autoWireEnabled = false; |
| |
| @SuppressWarnings({ "rawtypes", "unchecked" }) |
| @Override |
| public void initializeExternalResources(ResourceManagerConfiguration aConfiguration, |
| String aQualifiedContextName, java.util.Map<String, Object> aAdditionalParams) |
| throws ResourceInitializationException { |
| |
| for (Entry<String, Object> e : externalContext.entrySet()) { |
| ResourceRegistration registration = mInternalResourceRegistrationMap.get(e.getKey()); |
| |
| if (registration == null) { |
| try { |
| // Register resource |
| ResourceRegistration reg = new ResourceRegistration(e.getValue(), null, |
| aQualifiedContextName); |
| ((Map) mInternalResourceRegistrationMap).put(e.getKey(), reg); |
| |
| // Perform binding |
| if (isAutoWireEnabled()) { |
| mResourceMap.put(aQualifiedContextName + e.getKey(), e.getValue()); |
| } |
| } catch (Exception e1) { |
| throw new ResourceInitializationException(e1); |
| } |
| } else { |
| try { |
| Object desc = getFieldValue(registration, "description"); |
| |
| if (desc != null) { |
| String definingContext = getFieldValue(registration, "definingContext"); |
| |
| if (aQualifiedContextName.startsWith(definingContext)) { |
| UIMAFramework.getLogger().logrb(Level.CONFIG, ResourceManager_impl.class.getName(), |
| "initializeExternalResources", LOG_RESOURCE_BUNDLE, |
| "UIMA_overridden_resource__CONFIG", |
| new Object[] { e.getKey(), aQualifiedContextName, definingContext }); |
| } else { |
| UIMAFramework.getLogger().logrb(Level.WARNING, ResourceManager_impl.class.getName(), |
| "initializeExternalResources", LOG_RESOURCE_BUNDLE, |
| "UIMA_duplicate_resource_name__WARNING", |
| new Object[] { e.getKey(), definingContext, aQualifiedContextName }); |
| } |
| } |
| } catch (Exception e1) { |
| throw new ResourceInitializationException(e1); |
| } |
| } |
| } |
| |
| super.initializeExternalResources(aConfiguration, aQualifiedContextName, aAdditionalParams); |
| } |
| |
| public void setExternalContext(Map<String, Object> aExternalContext) { |
| externalContext = aExternalContext; |
| } |
| |
| public void setAutoWireEnabled(boolean aAutoWireEnabled) { |
| autoWireEnabled = aAutoWireEnabled; |
| } |
| |
| public boolean isAutoWireEnabled() { |
| return autoWireEnabled; |
| } |
| |
| /** |
| * Instantiate a non-visible class. |
| */ |
| @SuppressWarnings({ "unchecked", "rawtypes" }) |
| private static <T> T newInstance(String aClassName, Object... aArgs) |
| throws ResourceInitializationException { |
| Constructor constr = null; |
| try { |
| Class<?> cl = Class.forName(aClassName); |
| |
| List<Class> types = new ArrayList<Class>(); |
| List<Object> values = new ArrayList<Object>(); |
| for (int i = 0; i < aArgs.length; i += 2) { |
| types.add((Class) aArgs[i]); |
| values.add(aArgs[i + 1]); |
| } |
| |
| constr = cl.getDeclaredConstructor(types.toArray(new Class[types.size()])); |
| constr.setAccessible(true); |
| return (T) constr.newInstance(values.toArray(new Object[values.size()])); |
| } catch (Exception e) { |
| throw new ResourceInitializationException(e); |
| } finally { |
| if (constr != null) { |
| constr.setAccessible(false); |
| } |
| } |
| } |
| |
| /** |
| * Get a field value from a non-visible field. |
| */ |
| @SuppressWarnings("unchecked") |
| private static <T> T getFieldValue(Object aObject, String aFieldName) |
| throws ResourceInitializationException { |
| Field f = null; |
| try { |
| f = aObject.getClass().getDeclaredField(aFieldName); |
| f.setAccessible(true); |
| return (T) f.get(aObject); |
| } catch (Exception e) { |
| throw new ResourceInitializationException(e); |
| } finally { |
| if (f != null) { |
| f.setAccessible(false); |
| } |
| } |
| } |
| } |