2 * Copyright (c) 2018 Pantheon Technologies, s.r.o. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.mdsal.binding.java.api.generator;
10 import com.google.common.collect.BiMap;
11 import com.google.common.collect.HashBiMap;
12 import java.util.Comparator;
13 import java.util.Iterator;
14 import java.util.Map.Entry;
15 import java.util.stream.Stream;
16 import org.eclipse.jdt.annotation.NonNullByDefault;
17 import org.opendaylight.mdsal.binding.model.api.GeneratedType;
18 import org.opendaylight.mdsal.binding.model.api.JavaTypeName;
21 * This class tracks types generated into a single Java compilation unit (file) and manages imports of that compilation
22 * unit. Since we are generating only public classes, this is synonymous to a top-level Java type.
25 final class TopLevelJavaGeneratedType extends AbstractJavaGeneratedType {
26 private final BiMap<JavaTypeName, String> importedTypes = HashBiMap.create();
28 TopLevelJavaGeneratedType(final GeneratedType genType) {
33 String localTypeName(final JavaTypeName type) {
34 // Locally-anchored type, this is simple: just strip the first local name component and concat the others
35 final Iterator<String> it = type.localNameComponents().iterator();
38 final StringBuilder sb = new StringBuilder().append(it.next());
39 while (it.hasNext()) {
40 sb.append('.').append(it.next());
46 boolean importCheckedType(final JavaTypeName type) {
47 if (importedTypes.containsKey(type)) {
50 final String simpleName = type.simpleName();
51 if (importedTypes.containsValue(simpleName)) {
54 importedTypes.put(type, simpleName);
58 Stream<JavaTypeName> imports() {
59 return importedTypes.entrySet().stream().filter(this::needsExplicitImport).map(Entry::getKey)
60 .sorted(Comparator.comparing(JavaTypeName::toString));
63 private boolean needsExplicitImport(final Entry<JavaTypeName, String> entry) {
64 final JavaTypeName name = entry.getKey();
66 if (!getName().packageName().equals(name.packageName())) {
67 // Different package: need to import it
71 if (!name.immediatelyEnclosingClass().isPresent()) {
72 // This a top-level class import, we can skip it
76 // This is a nested class, we need to spell it out if the import entry points to the simple name
77 return entry.getValue().equals(name.simpleName());