Java tutorial
/* * Copyright 2018 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.internal.component.model; import com.google.common.collect.Sets; import org.gradle.api.attributes.Attribute; import org.gradle.api.internal.attributes.ImmutableAttributes; import java.util.Set; public class AttributeSelectionUtils { public static Attribute<?>[] collectExtraAttributes(AttributeSelectionSchema schema, ImmutableAttributes[] candidateAttributeSets, ImmutableAttributes requested) { Set<Attribute<?>> extraAttributes = Sets.newLinkedHashSet(); for (ImmutableAttributes attributes : candidateAttributeSets) { extraAttributes.addAll(attributes.keySet()); } extraAttributes.removeAll(requested.keySet()); Attribute<?>[] extraAttributesArray = extraAttributes.toArray(new Attribute[0]); for (int i = 0; i < extraAttributesArray.length; i++) { Attribute<?> extraAttribute = extraAttributesArray[i]; Attribute<?> schemaAttribute = schema.getAttribute(extraAttribute.getName()); if (schemaAttribute != null) { extraAttributesArray[i] = schemaAttribute; } } return extraAttributesArray; } }