annotation/annotation/src/main/java/androidx/annotation/FloatRange.java

/*
 * Copyright (C) 2015 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 androidx.annotation;

import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.LOCAL_VARIABLE;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.CLASS;

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

/**
 * Denotes that the annotated element should be a float or double in the given range
 * <p>
 * Example:
 * <pre><code>
 *  &#64;FloatRange(from=0.0,to=1.0)
 *  public float getAlpha() {
 *      ...
 *  }
 * </code></pre>
 */
@Documented
@Retention(CLASS)
@Target({METHOD, PARAMETER, FIELD, LOCAL_VARIABLE, ANNOTATION_TYPE})
public @interface FloatRange {
    /**
     * Smallest value. Whether it is inclusive or not is determined
     * by {@link #fromInclusive}
     */
    double from() default Double.NEGATIVE_INFINITY;

    /**
     * Largest value. Whether it is inclusive or not is determined
     * by {@link #toInclusive}
     */
    double to() default Double.POSITIVE_INFINITY;

    /** Whether the from value is included in the range */
    boolean fromInclusive() default true;

    /** Whether the to value is included in the range */
    boolean toInclusive() default true;
}