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1   /*
2    * Copyright (c) 1994, 2003, 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 sun.tools.tree;
27  
28  import sun.tools.java.*;
29  import sun.tools.asm.Label;
30  import sun.tools.asm.Assembler;
31  import java.io.PrintStream;
32  import java.util.Vector;
33  
34  /**
35   * WARNING: The contents of this source file are not part of any
36   * supported API.  Code that depends on them does so at its own risk:
37   * they are subject to change or removal without notice.
38   */
39  public
40  class InlineNewInstanceExpression extends Expression {
41      MemberDefinition field;
42      Statement body;
43  
44      /**
45       * Constructor
46       */
47      InlineNewInstanceExpression(long where, Type type, MemberDefinition field, Statement body) {
48          super(INLINENEWINSTANCE, where, type);
49          this.field = field;
50          this.body = body;
51      }
52      /**
53       * Inline
54       */
55      public Expression inline(Environment env, Context ctx) {
56          return inlineValue(env, ctx);
57      }
58      public Expression inlineValue(Environment env, Context ctx) {
59          if (body != null) {
60              LocalMember v = (LocalMember)field.getArguments().elementAt(0);
61              Context newctx = new Context(ctx, this);
62              newctx.declare(env, v);
63              body = body.inline(env, newctx);
64          }
65          if ((body != null) && (body.op == INLINERETURN)) {
66              body = null;
67          }
68          return this;
69      }
70  
71      /**
72       * Create a copy of the expression for method inlining
73       */
74      public Expression copyInline(Context ctx) {
75          InlineNewInstanceExpression e = (InlineNewInstanceExpression)clone();
76          e.body = body.copyInline(ctx, true);
77          return e;
78      }
79  
80      /**
81       * Code
82       */
83      public void code(Environment env, Context ctx, Assembler asm) {
84          codeCommon(env, ctx, asm, false);
85      }
86      public void codeValue(Environment env, Context ctx, Assembler asm) {
87          codeCommon(env, ctx, asm, true);
88      }
89      private void codeCommon(Environment env, Context ctx, Assembler asm,
90                              boolean forValue) {
91          asm.add(where, opc_new, field.getClassDeclaration());
92          if (body != null) {
93              LocalMember v = (LocalMember)field.getArguments().elementAt(0);
94              CodeContext newctx = new CodeContext(ctx, this);
95              newctx.declare(env, v);
96              asm.add(where, opc_astore, new Integer(v.number));
97              body.code(env, newctx, asm);
98              asm.add(newctx.breakLabel);
99              if (forValue) {
100                 asm.add(where, opc_aload, new Integer(v.number));
101             }
102         }
103     }
104 
105     /**
106      * Print
107      */
108     public void print(PrintStream out) {
109         LocalMember v = (LocalMember)field.getArguments().elementAt(0);
110         out.println("(" + opNames[op] + "#" + v.hashCode() + "=" + field.hashCode());
111         if (body != null) {
112             body.print(out, 1);
113         } else {
114             out.print("<empty>");
115         }
116         out.print(")");
117     }
118 }