/
RubyProc.java
237 lines (195 loc) · 8.74 KB
/
RubyProc.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
/***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2001 Chad Fowler <chadfowler@chadfowler.com>
* Copyright (C) 2001 Alan Moore <alan_moore@gmx.net>
* Copyright (C) 2001-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2002-2005 Thomas E Enebo <enebo@acm.org>
* Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
* Copyright (C) 2005 Charles O Nutter <headius@headius.com>
* Copyright (C) 2007 Miguel Covarrubias <mlcovarrubias@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the CPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the CPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby;
import org.jruby.anno.JRubyMethod;
import org.jruby.anno.JRubyClass;
import org.jruby.exceptions.JumpException;
import org.jruby.internal.runtime.JumpTarget;
import org.jruby.runtime.Block;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.Visibility;
import org.jruby.runtime.builtin.IRubyObject;
/**
* @author jpetersen
*/
@JRubyClass(name="Proc")
public class RubyProc extends RubyObject implements JumpTarget {
private Block block = Block.NULL_BLOCK;
private Block.Type type;
private String file;
private int line;
public RubyProc(Ruby runtime, RubyClass rubyClass, Block.Type type) {
super(runtime, rubyClass);
this.type = type;
}
private static ObjectAllocator PROC_ALLOCATOR = new ObjectAllocator() {
public IRubyObject allocate(Ruby runtime, RubyClass klass) {
RubyProc instance = RubyProc.newProc(runtime, Block.Type.PROC);
instance.setMetaClass(klass);
return instance;
}
};
public static RubyClass createProcClass(Ruby runtime) {
RubyClass procClass = runtime.defineClass("Proc", runtime.getObject(), PROC_ALLOCATOR);
runtime.setProc(procClass);
procClass.defineAnnotatedMethods(RubyProc.class);
return procClass;
}
public Block getBlock() {
return block;
}
// Proc class
public static RubyProc newProc(Ruby runtime, Block.Type type) {
return new RubyProc(runtime, runtime.getProc(), type);
}
public static RubyProc newProc(Ruby runtime, Block block, Block.Type type) {
RubyProc proc = new RubyProc(runtime, runtime.getProc(), type);
proc.callInit(NULL_ARRAY, block);
return proc;
}
/**
* Create a new instance of a Proc object. We override this method (from RubyClass)
* since we need to deal with special case of Proc.new with no arguments or block arg. In
* this case, we need to check previous frame for a block to consume.
*/
@JRubyMethod(name = "new", rest = true, frame = true, meta = true)
public static IRubyObject newInstance(ThreadContext context, IRubyObject recv, IRubyObject[] args, Block block) {
Ruby runtime = recv.getRuntime();
// No passed in block, lets check next outer frame for one ('Proc.new')
if (!block.isGiven()) {
block = context.getPreviousFrame().getBlock();
}
if (block.isGiven() && block.getProcObject() != null) {
return block.getProcObject();
}
IRubyObject obj = ((RubyClass) recv).allocate();
obj.callMethod(context, "initialize", args, block);
return obj;
}
@JRubyMethod(name = "initialize", frame = true, visibility = Visibility.PRIVATE)
public IRubyObject initialize(ThreadContext context, Block procBlock) {
if (!procBlock.isGiven()) {
throw getRuntime().newArgumentError("tried to create Proc object without a block");
}
if (type == Block.Type.LAMBDA && procBlock == null) {
// TODO: warn "tried to create Proc object without a block"
}
block = procBlock.cloneBlock();
block.type = type;
block.setProcObject(this);
file = context.getFile();
line = context.getLine();
return this;
}
@JRubyMethod(name = "clone")
public IRubyObject rbClone() {
RubyProc newProc = new RubyProc(getRuntime(), getRuntime().getProc(), type);
newProc.block = getBlock();
newProc.file = file;
newProc.line = line;
// TODO: CLONE_SETUP here
return newProc;
}
@JRubyMethod(name = "dup")
public IRubyObject dup() {
RubyProc newProc = new RubyProc(getRuntime(), getRuntime().getProc(), type);
newProc.block = getBlock();
newProc.file = file;
newProc.line = line;
return newProc;
}
@JRubyMethod(name = "==", required = 1)
public IRubyObject op_equal(IRubyObject other) {
if (!(other instanceof RubyProc)) return getRuntime().getFalse();
if (this == other || this.block == ((RubyProc)other).block) {
return getRuntime().newBoolean(true);
}
return getRuntime().getFalse();
}
@JRubyMethod(name = "to_s")
public IRubyObject to_s() {
return RubyString.newString(getRuntime(),
"#<Proc:0x" + Integer.toString(block.hashCode(), 16) + "@" +
file + ":" + (line + 1) + ">");
}
@JRubyMethod(name = "binding")
public IRubyObject binding() {
return getRuntime().newBinding(block.getBinding());
}
public IRubyObject call(ThreadContext context, IRubyObject[] args) {
return call(context, args, null, Block.NULL_BLOCK);
}
// ENEBO: For method def others are Java to java versions
@JRubyMethod(name = {"call", "[]"}, rest = true, frame = true)
public IRubyObject call(ThreadContext context, IRubyObject[] args, Block unusedBlock) {
return call(context, args, null, Block.NULL_BLOCK);
}
public IRubyObject call(ThreadContext context, IRubyObject[] args, IRubyObject self, Block unusedBlock) {
assert args != null;
Ruby runtime = getRuntime();
try {
Block newBlock = block.cloneBlock();
if (self != null) newBlock.getBinding().setSelf(self);
// lambdas want returns
if (newBlock.type == Block.Type.LAMBDA) newBlock.getBinding().getFrame().setJumpTarget(this);
return newBlock.call(context, args);
} catch (JumpException.BreakJump bj) {
if (block.type == Block.Type.LAMBDA) return (IRubyObject) bj.getValue();
throw runtime.newLocalJumpError("break", (IRubyObject)bj.getValue(), "break from proc-closure");
} catch (JumpException.ReturnJump rj) {
Object target = rj.getTarget();
if (target == this || block.type == Block.Type.LAMBDA) return (IRubyObject) rj.getValue();
if (target == null) {
if (type == Block.Type.THREAD) {
throw runtime.newThreadError("return can't jump across threads");
} else {
throw runtime.newLocalJumpError("return", (IRubyObject)rj.getValue(), "unexpected return");
}
}
throw rj;
} catch (JumpException.RetryJump rj) {
throw runtime.newLocalJumpError("retry", (IRubyObject)rj.getValue(), "retry not supported outside rescue");
}
}
@JRubyMethod(name = "arity")
public RubyFixnum arity() {
return getRuntime().newFixnum(block.arity().getValue());
}
@JRubyMethod(name = "to_proc")
public RubyProc to_proc() {
return this;
}
}