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 com.google.common.collect.ImmutableSet.toImmutableSet;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.collect.ImmutableMap;
14 import com.google.common.collect.ImmutableMap.Builder;
15 import com.google.common.collect.ImmutableSet;
16 import com.google.common.collect.Iterables;
17 import com.google.common.collect.Streams;
18 import java.util.HashMap;
21 import javax.annotation.concurrent.NotThreadSafe;
22 import org.eclipse.jdt.annotation.NonNullByDefault;
23 import org.eclipse.jdt.annotation.Nullable;
24 import org.opendaylight.mdsal.binding.model.api.Enumeration;
25 import org.opendaylight.mdsal.binding.model.api.Enumeration.Pair;
26 import org.opendaylight.mdsal.binding.model.api.GeneratedType;
27 import org.opendaylight.mdsal.binding.model.api.JavaTypeName;
28 import org.opendaylight.mdsal.binding.model.api.ParameterizedType;
29 import org.opendaylight.mdsal.binding.model.api.Type;
30 import org.opendaylight.mdsal.binding.model.api.WildcardType;
33 * Abstract class representing a generated type, either top-level or nested. It takes care of tracking references
34 * to other Java types and resolving them as best as possible.
36 * @author Robert Varga
40 abstract class AbstractJavaGeneratedType {
41 private final Map<JavaTypeName, @Nullable String> nameCache = new HashMap<>();
42 private final Map<String, NestedJavaGeneratedType> enclosedTypes;
43 private final Set<String> conflictingNames;
45 private final JavaTypeName name;
47 AbstractJavaGeneratedType(final GeneratedType genType) {
48 name = genType.getIdentifier();
49 final Builder<String, NestedJavaGeneratedType> b = ImmutableMap.builder();
50 for (GeneratedType type : Iterables.concat(genType.getEnclosedTypes(), genType.getEnumerations())) {
51 b.put(type.getIdentifier().simpleName(), new NestedJavaGeneratedType(this, type));
53 enclosedTypes = b.build();
54 conflictingNames = genType instanceof Enumeration
55 ? ((Enumeration) genType).getValues().stream().map(Pair::getMappedName).collect(toImmutableSet())
59 AbstractJavaGeneratedType(final JavaTypeName name, final GeneratedType genType) {
60 this.name = requireNonNull(name);
61 enclosedTypes = ImmutableMap.of();
63 // This is a workaround for BuilderTemplate, which does not model itself correctly -- it should generate
64 // a GeneratedType for the Builder with a nested type for the implementation, which really should be
65 // a different template which gets generated as an inner type.
66 conflictingNames = Streams.concat(genType.getEnclosedTypes().stream(), genType.getEnumerations().stream())
67 .map(type -> type.getIdentifier().simpleName()).collect(toImmutableSet());
70 final JavaTypeName getName() {
74 final String getSimpleName() {
75 return name.simpleName();
78 final String getReferenceString(final Type type) {
79 if (!(type instanceof ParameterizedType)) {
80 return getReferenceString(type.getIdentifier());
83 final StringBuilder sb = new StringBuilder();
84 sb.append(getReferenceString(type.getIdentifier())).append('<');
85 final Type[] types = ((ParameterizedType) type).getActualTypeArguments();
86 if (types.length == 0) {
87 return sb.append("?>").toString();
90 for (int i = 0; i < types.length; i++) {
91 final Type t = types[i];
92 if (t instanceof WildcardType) {
93 sb.append("? extends ");
95 sb.append(getReferenceString(t));
96 if (i != types.length - 1) {
101 return sb.append('>').toString();
104 final String getReferenceString(final JavaTypeName type) {
105 if (type.packageName().isEmpty()) {
106 // This is a packageless primitive type, refer to it directly
107 return type.simpleName();
110 // Self-reference, return simple name
111 if (name.equals(type)) {
112 return name.simpleName();
115 // Fast path: we have already resolved how to refer to this type
116 final String existing = nameCache.get(type);
117 if (existing != null) {
121 // Fork based on whether the class is in this compilation unit, package or neither
123 if (name.topLevelClass().equals(type.topLevelClass())) {
124 result = localTypeName(type);
125 } else if (name.packageName().equals(type.packageName())) {
126 result = packageTypeName(type);
128 result = foreignTypeName(type);
131 nameCache.put(type, result);
135 final NestedJavaGeneratedType getEnclosedType(final JavaTypeName type) {
136 return requireNonNull(enclosedTypes.get(type.simpleName()));
139 final boolean checkAndImportType(final JavaTypeName type) {
140 // We can import the type only if it does not conflict with us or our immediately-enclosed types
141 final String simpleName = type.simpleName();
142 return !simpleName.equals(getSimpleName()) && !enclosedTypes.containsKey(simpleName)
143 && !conflictingNames.contains(simpleName) && importCheckedType(type);
146 abstract boolean importCheckedType(JavaTypeName type);
148 abstract String localTypeName(JavaTypeName type);
150 private String foreignTypeName(final JavaTypeName type) {
151 return checkAndImportType(type) ? type.simpleName() : type.toString();
154 private String packageTypeName(final JavaTypeName type) {
155 // Try to anchor the top-level type and use a local reference
156 return checkAndImportType(type.topLevelClass()) ? type.localName() : type.toString();