dependencymanager/org.apache.felix.dependencymanager.lambda/src/org/apache/felix/dm/lambda/FluentProperty.java

package org.apache.felix.dm.lambda;

import org.apache.felix.dm.lambda.callbacks.SerializableLambda;

/**
 * Lambda allowing to define fluent service properties. Property names are deduces from the lambda parameter name.
 * 
 * <p> Example of a component which provides fluent properties {"foo"="bar"; "foo2"=Integer(123)}:
 * 
 * <pre>{@code
 * public class Activator extends DependencyManagerActivator {
 *   public void init(BundleContext ctx, DependencyManager dm) throws Exception {
 *       component(comp -> comp.impl(MyComponentImpl.class).provides(MyService.class, foo->"bar", foo2 -> 123));
 *   }
 * } 
 * }</pre>
 * 
 * <b>Caution: Fluent properties requires the usage of the "-parameter" javac option.</b>
 * 
 * Under eclipse, you can enable this option using:
 * 
 * <pre>{@code
 * Windows -> Preference -> Compiler -> Classfile Generation -> Store information about method parameters.
 * }</pre>
 */
@FunctionalInterface
public interface FluentProperty extends SerializableLambda {
    /**
     * Represents a fluent property
     * 
     * @param name the property name. The parameter used by the lambda will be intropsected and will be used as the actual property name.
     * @return the property value
     */
    public Object apply(String name);
}