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 static java.util.Objects.requireNonNull;
12 import com.google.common.collect.ImmutableMap;
13 import com.google.common.collect.ImmutableMap.Builder;
14 import com.google.common.collect.ImmutableSet;
15 import com.google.common.collect.Iterables;
16 import java.util.HashMap;
17 import java.util.HashSet;
20 import javax.annotation.concurrent.NotThreadSafe;
21 import org.eclipse.jdt.annotation.NonNullByDefault;
22 import org.eclipse.jdt.annotation.Nullable;
23 import org.opendaylight.mdsal.binding.model.api.Enumeration;
24 import org.opendaylight.mdsal.binding.model.api.Enumeration.Pair;
25 import org.opendaylight.mdsal.binding.model.api.GeneratedType;
26 import org.opendaylight.mdsal.binding.model.api.JavaTypeName;
27 import org.opendaylight.mdsal.binding.model.api.ParameterizedType;
28 import org.opendaylight.mdsal.binding.model.api.Type;
29 import org.opendaylight.mdsal.binding.model.api.WildcardType;
32 * Abstract class representing a generated type, either top-level or nested. It takes care of tracking references
33 * to other Java types and resolving them as best as possible.
35 * @author Robert Varga
39 abstract class AbstractJavaGeneratedType {
40 private final Map<JavaTypeName, @Nullable String> nameCache = new HashMap<>();
41 private final ImmutableMap<String, NestedJavaGeneratedType> enclosedTypes;
42 private final ImmutableSet<String> conflictingNames;
44 private final JavaTypeName name;
46 AbstractJavaGeneratedType(final GeneratedType genType) {
47 name = genType.getIdentifier();
48 final Builder<String, NestedJavaGeneratedType> b = ImmutableMap.builder();
49 for (GeneratedType type : Iterables.concat(genType.getEnclosedTypes(), genType.getEnumerations())) {
50 b.put(type.getIdentifier().simpleName(), new NestedJavaGeneratedType(this, type));
52 enclosedTypes = b.build();
54 final Set<String> cb = new HashSet<>();
55 if (genType instanceof Enumeration) {
56 ((Enumeration) genType).getValues().stream().map(Pair::getMappedName).forEach(cb::add);
58 // TODO: perhaps we can do something smarter to actually access the types
59 collectAccessibleTypes(cb, genType);
61 conflictingNames = ImmutableSet.copyOf(cb);
64 private void collectAccessibleTypes(final Set<String> set, final GeneratedType type) {
65 for (Type impl : type.getImplements()) {
66 if (impl instanceof GeneratedType) {
67 final GeneratedType genType = (GeneratedType) impl;
68 for (GeneratedType inner : Iterables.concat(genType.getEnclosedTypes(), genType.getEnumerations())) {
69 set.add(inner.getIdentifier().simpleName());
71 collectAccessibleTypes(set, genType);
76 final JavaTypeName getName() {
80 final String getSimpleName() {
81 return name.simpleName();
84 final String getReferenceString(final Type type, final String... annotations) {
85 final String ref = getReferenceString(type.getIdentifier());
86 if (!(type instanceof ParameterizedType)) {
87 return annotations.length == 0 ? ref : annotate(ref, annotations).toString();
90 final StringBuilder sb = annotate(ref, annotations).append('<');
91 final Type[] types = ((ParameterizedType) type).getActualTypeArguments();
92 if (types.length == 0) {
93 return sb.append("?>").toString();
96 for (int i = 0; i < types.length; i++) {
97 final Type t = types[i];
98 if (t instanceof WildcardType) {
99 sb.append("? extends ");
101 sb.append(getReferenceString(t));
102 if (i != types.length - 1) {
107 return sb.append('>').toString();
110 final String getReferenceString(final JavaTypeName type) {
111 if (type.packageName().isEmpty()) {
112 // This is a packageless primitive type, refer to it directly
113 return type.simpleName();
116 // Self-reference, return simple name
117 if (name.equals(type)) {
118 return name.simpleName();
121 // Fast path: we have already resolved how to refer to this type
122 final String existing = nameCache.get(type);
123 if (existing != null) {
127 // Fork based on whether the class is in this compilation unit, package or neither
129 if (name.topLevelClass().equals(type.topLevelClass())) {
130 result = localTypeName(type);
131 } else if (name.packageName().equals(type.packageName())) {
132 result = packageTypeName(type);
134 result = foreignTypeName(type);
137 nameCache.put(type, result);
141 final NestedJavaGeneratedType getEnclosedType(final JavaTypeName type) {
142 return requireNonNull(enclosedTypes.get(type.simpleName()));
145 final boolean checkAndImportType(final JavaTypeName type) {
146 // We can import the type only if it does not conflict with us or our immediately-enclosed types
147 final String simpleName = type.simpleName();
148 return !simpleName.equals(getSimpleName()) && !enclosedTypes.containsKey(simpleName)
149 && !conflictingNames.contains(simpleName) && importCheckedType(type);
152 abstract boolean importCheckedType(JavaTypeName type);
154 abstract String localTypeName(JavaTypeName type);
156 private String foreignTypeName(final JavaTypeName type) {
157 return checkAndImportType(type) ? type.simpleName() : type.toString();
160 private String packageTypeName(final JavaTypeName type) {
161 // Try to anchor the top-level type and use a local reference
162 return checkAndImportType(type.topLevelClass()) ? type.localName() : type.toString();
165 private static StringBuilder annotate(final String ref, final String... annotations) {
166 final StringBuilder sb = new StringBuilder();
167 if (annotations.length == 0) {
168 return sb.append(ref);
171 final int dot = ref.lastIndexOf('.');
173 sb.append(ref, 0, dot + 1);
175 for (String annotation : annotations) {
176 sb.append('@').append(annotation).append(' ');
179 return sb.append(ref, dot + 1, ref.length());