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Commit 041d90b2 authored by Ember Rose's avatar Ember Rose
Browse files

Add Inspector annotations

Add the @InspectableChildren, @InspectableNodeName, and
@InspectableProperty annotations, and a host library containing them for
use in the annotation processor.

Bug: 118893821
Test: m
Change-Id: I11dcec09c2c69db951fc87d37463b6f8ca28d8fe
parent fe878c45
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@@ -764,6 +764,16 @@ java_library {
    ],
}

// A host library containing the inspector annotations for inspector-annotation-processor.
java_library_host {
    name: "inspector-annotation",
    srcs: [
        "core/java/android/view/inspector/InspectableChildren.java",
        "core/java/android/view/inspector/InspectableNodeName.java",
        "core/java/android/view/inspector/InspectableProperty.java",
    ],
}

// A host library including just UnsupportedAppUsage.java so that the annotation
// processor can also use this annotation.
java_library_host {
+46 −0
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/*
 * Copyright 2018 The Android Open Source Project
 *
 * Licensed 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 android.view.inspector;

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.SOURCE;

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

/**
 * Marks a getter for an inspectable node's inspectable children.
 *
 * This annotation can be applied to any getter that returns a collection of objects, either an
 * array, an {@link Iterable} or a {@link java.util.Iterator}. The getter may return null, which
 * will be treated as an empty collection. Additionally, the inspector will discard any null
 * entries in the collection.
 *
 * By default, this annotation is inherited. At runtime, the inspector introspects on the class
 * hierachy and uses the annotated getter from the bottommost class, if different from any
 * annoated getters of the parent class. If a class inherits from a parent class with an annotated
 * getter, but does not include this annotation, the child class will be traversed using the
 * getter annotated on the parent. This holds true even if the child class overrides the getter.
 *
 * @see InspectionHelper#traverseChildren(Object, ChildTraverser)
 * @see InspectionHelper#hasChildTraversal()
 * @hide
 */
@Target({METHOD})
@Retention(SOURCE)
public @interface InspectableChildren {
}
+49 −0
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/*
 * Copyright 2018 The Android Open Source Project
 *
 * Licensed 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 android.view.inspector;

import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.SOURCE;

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

/**
 * Marks the node name to display to a developer in the inspection tree.
 *
 * This annotation is optional to marking a class as inspectable. If it is omitted, the node name
 * will be inferred using the semantics of {@link Class#getSimpleName()}. The fully qualified class
 * name is always available in the tree, this is for display purposes only. If a class is inflated
 * from XML and the tag it inflates from does not match its simple name, this annotation should be
 * used to inform the inspector to display the XML tag name in the inspection tree view.
 *
 * This annotation does not inherit. If a class extends an annotated parent class, but does not
 * annotate itself, its node name will be inferred from its Java name.
 *
 * @see InspectionHelper#getNodeName()
 * @hide
 */
@Target({TYPE})
@Retention(SOURCE)
public @interface InspectableNodeName {
    /**
     * The display name for nodes of this type.
     *
     * @return The name for nodes of this type
     */
    String value();
}
+50 −0
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/*
 * Copyright 2018 The Android Open Source Project
 *
 * Licensed 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 android.view.inspector;

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.SOURCE;

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

/**
 * Marks a getter of a property on an inspectable node.
 *
 * This annotation is inherited by default. If a child class doesn't add it to a getter, but a
 * parent class does, the property will be inspected, even if the child overrides the definition
 * of the getter. If a child class defines a property of the same name of a property on the parent
 * but on a different getter, the inspector will use the child's getter when inspecting instances
 * of the child, and the parent's otherwise.
 *
 * @see InspectionHelper#mapProperties(PropertyMapper)
 * @see InspectionHelper#readProperties(Object, PropertyReader)
 * @hide
 */
@Target({METHOD})
@Retention(SOURCE)
public @interface InspectableProperty {
    /**
     * The name of the property.
     *
     * If left empty (the default), the property name will be inferred from the name of the getter
     * method.
     *
     * @return The name of the property.
     */
    String value() default "";
}