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 monitor,
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 wrapLifeCycle(monitor.newInjector(new TypedFieldInjector(componentKey, componentImplementation, parameters, monitor,
045                    fieldTypes)), lifecycleStrategy);
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    }