    001    /*****************************************************************************
    002     * Copyright (C) PicoContainer Organization. All rights reserved.            *
    003     * ------------------------------------------------------------------------- *
    004     * The software in this package is published under the terms of the BSD      *
    005     * style license a copy of which has been included with this distribution in *
    006     * the LICENSE.txt file.                                                     *
    007     *                                                                           *
    008     * Original code by                                                          *
    009     *****************************************************************************/
    010    package org.picocontainer.injectors;
    011
    012    import org.picocontainer.ComponentAdapter;
    013    import org.picocontainer.ComponentMonitor;
    014    import org.picocontainer.LifecycleStrategy;
    015    import org.picocontainer.Parameter;
    016    import org.picocontainer.PicoCompositionException;
    017    import java.util.Properties;
    018    import static org.picocontainer.Characteristics.immutable;
    019
    020    /**
    021     * A {@link org.picocontainer.InjectionFactory} for named fields.
    022     *
    023     * Use like so: pico.as(injectionFieldNames("field1", "field2")).addComponent(...)
    024     *
    025     * The factory creates {@link TypedFieldInjector}.
    026     *
    027     * @author Paul Hammant
    028     */
    029    @SuppressWarnings("serial")
    030    public class TypedFieldInjection extends AbstractInjectionFactory {
    031
    032        private static final String INJECTION_FIELD_TYPES = "injectionFieldTypes";
    033
    034        public <T> ComponentAdapter<T> createComponentAdapter(ComponentMonitor componentMonitor,
    035                                                       LifecycleStrategy lifecycleStrategy,
    036                                                       Properties componentProperties,
    037                                                       Object componentKey,
    038                                                       Class<T> componentImplementation,
    039                                                       Parameter... parameters) throws PicoCompositionException {
    040            String fieldTypes = (String) componentProperties.remove(INJECTION_FIELD_TYPES);
    041            if (fieldTypes == null) {
    042                fieldTypes = "";
    043            }
    044            return componentMonitor.newInjector(new TypedFieldInjector(componentKey, componentImplementation, parameters, componentMonitor,
    045                    lifecycleStrategy, fieldTypes));
    046        }
    047
    048        public static Properties injectionFieldTypes(String... fieldTypes) {
    049            StringBuilder sb = new StringBuilder();
    050            for (int i = 0; i < fieldTypes.length; i++) {
    051                sb.append(" ").append(fieldTypes[i]);
    052            }
    053            return immutable(INJECTION_FIELD_TYPES, sb.toString().trim());
    054        }
    055
    056    }