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AndSpec.java
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AndSpec.java
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/*
* Copyright 2010 the original author or authors.
*
* 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 org.gradle.api.specs;
import com.google.common.collect.ObjectArrays;
import groovy.lang.Closure;
import org.gradle.api.Incubating;
import org.gradle.api.specs.internal.ClosureSpec;
import org.gradle.internal.Cast;
import javax.annotation.Nullable;
/**
* A {@link org.gradle.api.specs.CompositeSpec} which requires all its specs to be true in order to evaluate to true.
* Uses lazy evaluation.
*
* @param <T> The target type for this Spec
*/
public class AndSpec<T> extends CompositeSpec<T> {
public static final AndSpec<?> EMPTY = new AndSpec<>();
public AndSpec() {
super();
}
@SafeVarargs
@SuppressWarnings("varargs")
public AndSpec(Spec<? super T>... specs) {
super(specs);
}
public AndSpec(Iterable<? extends Spec<? super T>> specs) {
super(specs);
}
@Override
public boolean isSatisfiedBy(T object) {
return findUnsatisfiedSpec(object) == null;
}
/**
* Finds the first {@link Spec} that is not satisfied by the object.
*
* @param object to check specs against
* @return an unsatisfied spec or null
*
* @since 7.6
*/
@Nullable
@Incubating
public Spec<? super T> findUnsatisfiedSpec(T object) {
Spec<? super T>[] specs = getSpecsArray();
for (Spec<? super T> spec : specs) {
if (!spec.isSatisfiedBy(object)) {
return spec;
}
}
return null;
}
@SuppressWarnings("varargs")
public AndSpec<T> and(Spec<? super T>... specs) {
if (specs.length == 0) {
return this;
}
Spec<? super T>[] thisSpecs = getSpecsArray();
int thisLength = thisSpecs.length;
if (thisLength == 0) {
return new AndSpec<T>(specs);
}
Spec<? super T>[] combinedSpecs = uncheckedCast(ObjectArrays.newArray(Spec.class, thisLength + specs.length));
System.arraycopy(thisSpecs, 0, combinedSpecs, 0, thisLength);
System.arraycopy(specs, 0, combinedSpecs, thisLength, specs.length);
return new AndSpec<T>(combinedSpecs);
}
/**
* Typed and() method for a single {@link Spec}.
*
* @since 4.3
*/
public AndSpec<T> and(Spec<? super T> spec) {
return and(Cast.<Spec<? super T>[]>uncheckedNonnullCast(new Spec<?>[]{spec}));
}
@SuppressWarnings("rawtypes")
public AndSpec<T> and(Closure spec) {
return and(new ClosureSpec<>(spec));
}
public static <T> AndSpec<T> empty() {
return uncheckedCast(EMPTY);
}
}