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• source code
• SlingObject.java

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org.apache.sling.models.annotations.injectorspecific.SlingObject Maven / Gradle / Ivy

/*
 * 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.sling.models.annotations.injectorspecific;

import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import org.apache.sling.models.annotations.Source;
import org.apache.sling.models.spi.injectorspecific.InjectAnnotation;

/**
 * Injects common Sling objects that can be derived from either a SlingHttpServletRequest, a ResourceResolver or a
 * Resource.
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The injection is class-based.
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Supports the following objects:
Class
Description
Request
ResourceResolver
Resource
ResourceResolver
Resource resolver
X
X
X
Resource
Resource
X
X
SlingHttpServletRequest
Sling request
X
SlingHttpServletResponse
Sling response
X
SlingScriptHelper
Sling script helper
X

 */
@Target({ METHOD, FIELD, PARAMETER })
@Retention(RUNTIME)
@InjectAnnotation
@Source("sling-object")
public @interface SlingObject {

    /**
     * If set to true, the model can be instantiated even if there is no request attribute
     * with the given name found.
     * Default = false.
     * @return Optional
     * @deprecated Use {@link #injectionStrategy} instead
     */
    @Deprecated
    boolean optional() default false;

    /**
     * Specifies the injection strategy applied to an annotated element:
     * 

     * 
If set to {@link InjectionStrategy#REQUIRED}, injection is mandatory.
     * 
If set to {@link InjectionStrategy#OPTIONAL}, injection is optional.
     * 
If set to {@link InjectionStrategy#DEFAULT} (default), the default injection strategy defined on the
     * {@link org.apache.sling.models.annotations.Model} applies.
     * 
     * WARNING: Injection strategy is ignored if either {@link org.apache.sling.models.annotations.Optional}
     * or {@link org.apache.sling.models.annotations.Required} is applied on the same element.
     * @return Injection strategy
     */
    public InjectionStrategy injectionStrategy() default InjectionStrategy.DEFAULT;

}