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Diffstat (limited to 'sca-java-1.x/branches/pre-spec-changes/kernel/core/src/main/java/org/apache/tuscany/core/injection/FieldInjector.java')
-rw-r--r-- | sca-java-1.x/branches/pre-spec-changes/kernel/core/src/main/java/org/apache/tuscany/core/injection/FieldInjector.java | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/pre-spec-changes/kernel/core/src/main/java/org/apache/tuscany/core/injection/FieldInjector.java b/sca-java-1.x/branches/pre-spec-changes/kernel/core/src/main/java/org/apache/tuscany/core/injection/FieldInjector.java new file mode 100644 index 0000000000..e9f8f42aa1 --- /dev/null +++ b/sca-java-1.x/branches/pre-spec-changes/kernel/core/src/main/java/org/apache/tuscany/core/injection/FieldInjector.java @@ -0,0 +1,57 @@ +/* + * 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.tuscany.core.injection; + +import java.lang.reflect.Field; + +import org.apache.tuscany.spi.ObjectCreationException; +import org.apache.tuscany.spi.ObjectFactory; + +/** + * Injects a value created by an {@link org.apache.tuscany.spi.ObjectFactory} on a given field + * + * @version $Rev$ $Date$ + */ +public class FieldInjector<T> implements Injector<T> { + + private final Field field; + + private final ObjectFactory<?> objectFactory; + + /** + * Create an injector and have it use the given <code>ObjectFactory</code> to inject a value on the instance using + * the reflected <code>Field</code> + */ + public FieldInjector(Field field, ObjectFactory<?> objectFactory) { + this.field = field; + this.field.setAccessible(true); + this.objectFactory = objectFactory; + } + + /** + * Inject a new value on the given isntance + */ + public void inject(T instance) throws ObjectCreationException { + try { + field.set(instance, objectFactory.getInstance()); + } catch (IllegalAccessException e) { + throw new AssertionError("Field is not accessible [" + field + "]"); + } + } +} |