1 /*
   2  * Copyright (c) 2015, 2018, 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  */
  25 
  26 package jdk.jshell;
  27 
  28 import java.util.Collection;
  29 import java.util.Set;
  30 import java.util.stream.Collectors;
  31 import jdk.jshell.Key.VarKey;
  32 
  33 /**
  34  * Snippet for a variable definition.
  35  * The Kind is {@link jdk.jshell.Snippet.Kind#VAR}.
  36  * <p>
  37  * <code>VarSnippet</code> is immutable: an access to
  38  * any of its methods will always return the same result.
  39  * and thus is thread-safe.
  40  *
  41  * @since 9
  42  * @jls 8.3 Field Declarations
  43  */
  44 public class VarSnippet extends DeclarationSnippet {
  45 
  46     /**A human readable type of the variable. May include intersection types
  47      * and human readable description of anonymous classes.
  48      */
  49     final String typeName;
  50 
  51     /**The full type inferred for "var" variables. May include intersection types
  52      * and inaccessible types. {@literal null} if enhancing the type is not necessary.
  53      */
  54     final String fullTypeName;
  55 
  56     /**The anonymous class declared in the initializer of the "var" variable.
  57      * These are automatically statically imported when the field is imported.
  58      */
  59     final Set<String> anonymousClasses;
  60 
  61      VarSnippet(VarKey key, String userSource, Wrap guts,
  62             String name, SubKind subkind, String typeName, String fullTypeName,
  63             Set<String> anonymousClasses, Collection<String> declareReferences,
  64             DiagList syntheticDiags) {
  65         super(key, userSource, guts, name, subkind, null, declareReferences,
  66                 null, syntheticDiags);
  67         this.typeName = typeName;
  68         this.fullTypeName = fullTypeName;
  69         this.anonymousClasses = anonymousClasses;
  70     }
  71 
  72     /**
  73      * A String representation of the type of the variable.
  74      * @return the variable type as a String.
  75      */
  76     public String typeName() {
  77         return typeName;
  78     }
  79 
  80     @Override
  81     String importLine(JShell state) {
  82         return "import static " + classFullName() + "." + name() + ";   " +
  83                anonymousClasses.stream()
  84                                .map(c -> "import static " + classFullName() + "." + c + ";   ")
  85                                .collect(Collectors.joining());
  86     }
  87 
  88 }