author | jfranck |
Mon, 03 Dec 2012 11:16:32 +0100 | |
changeset 14804 | f93a8d60b9a4 |
parent 14258 | 8d2148961366 |
child 15356 | cf312dc54c60 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.tools.javac.code; |
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|
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import java.util.Map; |
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import javax.tools.JavaFileObject; |
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import com.sun.tools.javac.comp.Annotate; |
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import com.sun.tools.javac.comp.AttrContext; |
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import com.sun.tools.javac.comp.Env; |
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import com.sun.tools.javac.util.*; |
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import com.sun.tools.javac.util.Assert; |
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import com.sun.tools.javac.util.List; |
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import com.sun.tools.javac.util.Log; |
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import com.sun.tools.javac.util.Pair; |
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import static com.sun.tools.javac.code.Kinds.PCK; |
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/** |
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* Container for all annotations (attributes in javac) on a Symbol. |
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* |
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* This class is explicitly mutable. Its contents will change when attributes |
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* are annotated onto the Symbol. However this class depends on the facts that |
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* List (in javac) is immutable. |
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* |
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* An instance of this class can be in one of three states: |
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* |
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* NOT_STARTED indicates that the Symbol this instance belongs to have not been |
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* annotated (yet). Specifically if the declaration is not annotated this |
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* instance will never move past NOT_STARTED. You can never go back to |
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* NOT_STARTED. |
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* |
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* IN_PROGRESS annotations have been found on the declaration. Will be processed |
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* later. You can reset to IN_PROGRESS. While IN_PROGRESS you can set the list |
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* of attributes (and this moves out of the IN_PROGRESS state). |
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* |
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* "unnamed" this Annotations contains some attributes, possibly the final set. |
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* While in this state you can only prepend or append to the attributes not set |
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* it directly. You can also move back to the IN_PROGRESS sate using reset(). |
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* |
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* <p><b>This is NOT part of any supported API. If you write code that depends |
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* on this, you do so at your own risk. This code and its internal interfaces |
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* are subject to change or deletion without notice.</b> |
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*/ |
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public class Annotations { |
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private static final List<Attribute.Compound> NOT_STARTED = List.of(null); |
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private static final List<Attribute.Compound> IN_PROGRESS = List.of(null); |
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/* |
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* This field should never be null |
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*/ |
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private List<Attribute.Compound> attributes = NOT_STARTED; |
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/* |
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* The Symbol this Annotations belong to |
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*/ |
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private final Symbol sym; |
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public Annotations(Symbol sym) { |
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this.sym = sym; |
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} |
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public List<Attribute.Compound> getAttributes() { |
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return filterSentinels(attributes); |
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} |
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public void setAttributes(List<Attribute.Compound> a) { |
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Assert.check(pendingCompletion() || !isStarted()); |
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if (a == null) { |
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throw new NullPointerException(); |
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} |
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attributes = a; |
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} |
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public void setAttributes(Annotations other) { |
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if (other == null) { |
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throw new NullPointerException(); |
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} |
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setAttributes(other.getAttributes()); |
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} |
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public void setAttributesWithCompletion(final Annotate.AnnotateRepeatedContext ctx) { |
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Assert.check(pendingCompletion() || (!isStarted() && sym.kind == PCK)); |
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Map<Symbol.TypeSymbol, ListBuffer<Attribute.Compound>> annotated = ctx.annotated; |
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boolean atLeastOneRepeated = false; |
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List<Attribute.Compound> buf = List.<Attribute.Compound>nil(); |
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for (ListBuffer<Attribute.Compound> lb : annotated.values()) { |
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if (lb.size() == 1) { |
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buf = buf.prepend(lb.first()); |
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} else { // repeated |
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buf = buf.prepend(new Placeholder(lb.toList(), sym)); |
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atLeastOneRepeated = true; |
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} |
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} |
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// Add non-repeating attributes |
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setAttributes(buf.reverse()); |
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if (atLeastOneRepeated) { |
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// The Symbol s is now annotated with a combination of |
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// finished non-repeating annotations and placeholders for |
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// repeating annotations. |
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// |
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// We need to do this in two passes because when creating |
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// a container for a repeating annotation we must |
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// guarantee that the @ContainedBy on the |
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// contained annotation is fully annotated |
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// |
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// The way we force this order is to do all repeating |
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// annotations in a pass after all non-repeating are |
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// finished. This will work because @ContainedBy |
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// is non-repeating and therefore will be annotated in the |
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// fist pass. |
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// Queue a pass that will replace Attribute.Placeholders |
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// with Attribute.Compound (made from synthesized containers). |
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ctx.annotateRepeated(new Annotate.Annotator() { |
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142 |
@Override |
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public String toString() { |
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return "repeated annotation pass of: " + sym + " in: " + sym.owner; |
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} |
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146 |
|
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147 |
@Override |
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148 |
public void enterAnnotation() { |
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149 |
complete(ctx); |
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} |
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151 |
}); |
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152 |
} |
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153 |
} |
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154 |
|
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public Annotations reset() { |
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attributes = IN_PROGRESS; |
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return this; |
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158 |
} |
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159 |
|
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160 |
public boolean isEmpty() { |
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return !isStarted() |
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|| pendingCompletion() |
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|| attributes.isEmpty(); |
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164 |
} |
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165 |
|
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166 |
public boolean pendingCompletion() { |
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167 |
return attributes == IN_PROGRESS; |
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168 |
} |
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169 |
|
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public Annotations append(List<Attribute.Compound> l) { |
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attributes = filterSentinels(attributes); |
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172 |
|
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173 |
if (l.isEmpty()) { |
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174 |
; // no-op |
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175 |
} else if (attributes.isEmpty()) { |
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176 |
attributes = l; |
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177 |
} else { |
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attributes = attributes.appendList(l); |
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179 |
} |
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180 |
return this; |
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181 |
} |
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182 |
|
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183 |
public Annotations prepend(List<Attribute.Compound> l) { |
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attributes = filterSentinels(attributes); |
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|
185 |
|
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|
186 |
if (l.isEmpty()) { |
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|
187 |
; // no-op |
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|
188 |
} else if (attributes.isEmpty()) { |
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189 |
attributes = l; |
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|
190 |
} else { |
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191 |
attributes = attributes.prependList(l); |
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|
192 |
} |
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193 |
return this; |
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|
194 |
} |
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195 |
|
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196 |
private List<Attribute.Compound> filterSentinels(List<Attribute.Compound> a) { |
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197 |
return (a == IN_PROGRESS || a == NOT_STARTED) |
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198 |
? List.<Attribute.Compound>nil() |
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|
199 |
: a; |
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200 |
} |
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|
201 |
|
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|
202 |
private boolean isStarted() { |
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|
203 |
return attributes != NOT_STARTED; |
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|
204 |
} |
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|
205 |
|
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|
206 |
private List<Attribute.Compound> getPlaceholders() { |
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|
207 |
List<Attribute.Compound> res = List.<Attribute.Compound>nil(); |
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|
208 |
for (Attribute.Compound a : filterSentinels(attributes)) { |
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|
209 |
if (a instanceof Placeholder) { |
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|
210 |
res = res.prepend(a); |
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|
211 |
} |
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|
212 |
} |
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|
213 |
return res.reverse(); |
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|
214 |
} |
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|
215 |
|
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|
216 |
/* |
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|
217 |
* Replace Placeholders for repeating annotations with their containers |
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|
218 |
*/ |
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|
219 |
private void complete(Annotate.AnnotateRepeatedContext ctx) { |
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|
220 |
Assert.check(!pendingCompletion()); |
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|
221 |
Log log = ctx.log; |
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|
222 |
Env<AttrContext> env = ctx.env; |
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|
223 |
JavaFileObject oldSource = log.useSource(env.toplevel.sourcefile); |
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|
224 |
try { |
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|
225 |
|
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|
226 |
if (isEmpty()) { |
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parents:
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|
227 |
return; |
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|
228 |
} |
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|
229 |
|
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|
230 |
List<Attribute.Compound> result = List.nil(); |
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|
231 |
for (Attribute.Compound a : getAttributes()) { |
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parents:
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|
232 |
if (a instanceof Placeholder) { |
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|
233 |
Attribute.Compound replacement = replaceOne((Placeholder) a, ctx); |
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|
234 |
|
4d519199a6aa
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parents:
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|
235 |
if (null != replacement) { |
4d519199a6aa
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parents:
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changeset
|
236 |
result = result.prepend(replacement); |
4d519199a6aa
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|
237 |
} |
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|
238 |
} else { |
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parents:
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|
239 |
result = result.prepend(a); |
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parents:
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|
240 |
} |
4d519199a6aa
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parents:
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changeset
|
241 |
} |
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changeset
|
242 |
|
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parents:
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|
243 |
attributes = result.reverse(); |
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|
244 |
|
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|
245 |
Assert.check(Annotations.this.getPlaceholders().isEmpty()); |
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parents:
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|
246 |
} finally { |
4d519199a6aa
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|
247 |
log.useSource(oldSource); |
4d519199a6aa
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parents:
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|
248 |
} |
4d519199a6aa
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|
249 |
} |
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|
250 |
|
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|
251 |
private Attribute.Compound replaceOne(Placeholder placeholder, Annotate.AnnotateRepeatedContext ctx) { |
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|
252 |
Log log = ctx.log; |
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|
253 |
|
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|
254 |
// Process repeated annotations |
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|
255 |
Attribute.Compound validRepeated = |
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|
256 |
ctx.processRepeatedAnnotations(placeholder.getPlaceholderFor(), sym); |
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|
257 |
|
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|
258 |
if (validRepeated != null) { |
4d519199a6aa
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|
259 |
// Check that the container isn't manually |
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|
260 |
// present along with repeated instances of |
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|
261 |
// its contained annotation. |
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|
262 |
ListBuffer<Attribute.Compound> manualContainer = ctx.annotated.get(validRepeated.type.tsym); |
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|
263 |
if (manualContainer != null) { |
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|
264 |
log.error(ctx.pos.get(manualContainer.first()), "invalid.containedby.annotation.repeated.and.container.present", |
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|
265 |
manualContainer.first().type.tsym); |
4d519199a6aa
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|
266 |
} |
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parents:
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|
267 |
} |
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parents:
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changeset
|
268 |
|
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|
269 |
// A null return will delete the Placeholder |
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|
270 |
return validRepeated; |
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|
271 |
|
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|
272 |
} |
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|
273 |
|
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|
274 |
private static class Placeholder extends Attribute.Compound { |
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|
275 |
|
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|
276 |
private List<Attribute.Compound> placeholderFor; |
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|
277 |
private Symbol on; |
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|
278 |
|
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|
279 |
public Placeholder(List<Attribute.Compound> placeholderFor, Symbol on) { |
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|
280 |
super(Type.noType, List.<Pair<Symbol.MethodSymbol, Attribute>>nil()); |
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parents:
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|
281 |
this.placeholderFor = placeholderFor; |
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|
282 |
this.on = on; |
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parents:
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|
283 |
} |
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|
284 |
|
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|
285 |
@Override |
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parents:
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|
286 |
public String toString() { |
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parents:
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|
287 |
return "<placeholder: " + placeholderFor + " on: " + on + ">"; |
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parents:
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|
288 |
} |
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changeset
|
289 |
|
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|
290 |
public List<Attribute.Compound> getPlaceholderFor() { |
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parents:
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|
291 |
return placeholderFor; |
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parents:
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|
292 |
} |
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|
293 |
} |
4d519199a6aa
7151010: Add compiler support for repeating annotations
jfranck
parents:
diff
changeset
|
294 |
} |