1/*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25package jdk.jshell;
26
27import static com.sun.tools.javac.code.Flags.COMPOUND;
28import static com.sun.tools.javac.code.Kinds.Kind.PCK;
29import com.sun.tools.javac.code.Printer;
30import com.sun.tools.javac.code.Symbol;
31import com.sun.tools.javac.code.Symbol.ClassSymbol;
32import com.sun.tools.javac.code.Symbol.PackageSymbol;
33import com.sun.tools.javac.code.Type;
34import com.sun.tools.javac.code.Type.ClassType;
35import com.sun.tools.javac.util.JavacMessages;
36import java.util.Locale;
37import java.util.function.BinaryOperator;
38
39/**
40 * Print types in source form.
41 */
42class TypePrinter extends Printer {
43
44    private static final String OBJECT = "Object";
45
46    private final JavacMessages messages;
47    private final BinaryOperator<String> fullClassNameAndPackageToClass;
48
49    TypePrinter(JavacMessages messages, BinaryOperator<String> fullClassNameAndPackageToClass) {
50        this.messages = messages;
51        this.fullClassNameAndPackageToClass = fullClassNameAndPackageToClass;
52    }
53
54    String toString(Type t) {
55        return visit(t, Locale.getDefault());
56    }
57
58    @Override
59    protected String localize(Locale locale, String key, Object... args) {
60        return messages.getLocalizedString(locale, key, args);
61    }
62
63    @Override
64    protected String capturedVarId(Type.CapturedType t, Locale locale) {
65        throw new InternalError("should never call this");
66    }
67
68    @Override
69    public String visitCapturedType(Type.CapturedType t, Locale locale) {
70        return visit(t.wildcard, locale);
71    }
72
73    @Override
74    public String visitType(Type t, Locale locale) {
75        String s = (t.tsym == null || t.tsym.name == null)
76                ? OBJECT // none
77                : t.tsym.name.toString();
78        return s;
79    }
80
81    /**
82     * Converts a class name into a (possibly localized) string. Anonymous inner
83     * classes get converted into a localized string.
84     *
85     * @param t the type of the class whose name is to be rendered
86     * @param longform if set, the class' fullname is displayed - if unset the
87     * short name is chosen (w/o package)
88     * @param locale the locale in which the string is to be rendered
89     * @return localized string representation
90     */
91    @Override
92    protected String className(ClassType t, boolean longform, Locale locale) {
93        Symbol sym = t.tsym;
94        if (sym.name.length() == 0 && (sym.flags() & COMPOUND) != 0) {
95            return OBJECT;
96        } else if (sym.name.length() == 0) {
97            // Anonymous
98            String s;
99            ClassType norm = (ClassType) t.tsym.type;
100            if (norm == null) {
101                s = OBJECT;
102            } else if (norm.interfaces_field != null && norm.interfaces_field.nonEmpty()) {
103                s = visit(norm.interfaces_field.head, locale);
104            } else {
105                s = visit(norm.supertype_field, locale);
106            }
107            return s;
108        } else if (longform) {
109            String pkg = "";
110            for (Symbol psym = sym; psym != null; psym = psym.owner) {
111                if (psym.kind == PCK) {
112                    pkg = psym.getQualifiedName().toString();
113                    break;
114                }
115            }
116            return fullClassNameAndPackageToClass.apply(
117                    sym.getQualifiedName().toString(),
118                    pkg
119            );
120        } else {
121            return sym.name.toString();
122        }
123    }
124
125    @Override
126    public String visitClassSymbol(ClassSymbol sym, Locale locale) {
127        return sym.name.isEmpty()
128                ? sym.flatname.toString() // Anonymous
129                : sym.fullname.toString();
130    }
131
132    @Override
133    public String visitPackageSymbol(PackageSymbol s, Locale locale) {
134        return s.isUnnamed()
135                ? "" // Unnamed package
136                : s.fullname.toString();
137    }
138
139}
140