jfranck@1313: /*
jfranck@1313: * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
jfranck@1313: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jfranck@1313: *
jfranck@1313: * This code is free software; you can redistribute it and/or modify it
jfranck@1313: * under the terms of the GNU General Public License version 2 only, as
jfranck@1313: * published by the Free Software Foundation. Oracle designates this
jfranck@1313: * particular file as subject to the "Classpath" exception as provided
jfranck@1313: * by Oracle in the LICENSE file that accompanied this code.
jfranck@1313: *
jfranck@1313: * This code is distributed in the hope that it will be useful, but WITHOUT
jfranck@1313: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jfranck@1313: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
jfranck@1313: * version 2 for more details (a copy is included in the LICENSE file that
jfranck@1313: * accompanied this code).
jfranck@1313: *
jfranck@1313: * You should have received a copy of the GNU General Public License version
jfranck@1313: * 2 along with this work; if not, write to the Free Software Foundation,
jfranck@1313: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jfranck@1313: *
jfranck@1313: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jfranck@1313: * or visit www.oracle.com if you need additional information or have any
jfranck@1313: * questions.
jfranck@1313: */
jfranck@1313:
jfranck@1313: package com.sun.tools.javac.code;
jfranck@1313:
jfranck@1313: import java.util.Map;
jjg@1357:
jfranck@1313: import javax.tools.JavaFileObject;
jfranck@1313:
jfranck@1313: import com.sun.tools.javac.comp.Annotate;
jfranck@1313: import com.sun.tools.javac.comp.AttrContext;
jfranck@1313: import com.sun.tools.javac.comp.Env;
jjg@1357: import com.sun.tools.javac.util.*;
jfranck@1313: import com.sun.tools.javac.util.Assert;
jfranck@1313: import com.sun.tools.javac.util.List;
jfranck@1313: import com.sun.tools.javac.util.Log;
jfranck@1313: import com.sun.tools.javac.util.Pair;
jfranck@1313: import static com.sun.tools.javac.code.Kinds.PCK;
jfranck@1313:
jfranck@1313: /**
jfranck@1313: * Container for all annotations (attributes in javac) on a Symbol.
jfranck@1313: *
jfranck@1313: * This class is explicitly mutable. Its contents will change when attributes
jfranck@1313: * are annotated onto the Symbol. However this class depends on the facts that
jfranck@1313: * List (in javac) is immutable.
jfranck@1313: *
jfranck@1313: * An instance of this class can be in one of three states:
jfranck@1313: *
jfranck@1313: * NOT_STARTED indicates that the Symbol this instance belongs to have not been
jfranck@1313: * annotated (yet). Specifically if the declaration is not annotated this
jfranck@1313: * instance will never move past NOT_STARTED. You can never go back to
jfranck@1313: * NOT_STARTED.
jfranck@1313: *
jfranck@1313: * IN_PROGRESS annotations have been found on the declaration. Will be processed
jfranck@1313: * later. You can reset to IN_PROGRESS. While IN_PROGRESS you can set the list
jfranck@1313: * of attributes (and this moves out of the IN_PROGRESS state).
jfranck@1313: *
jfranck@1313: * "unnamed" this Annotations contains some attributes, possibly the final set.
jfranck@1313: * While in this state you can only prepend or append to the attributes not set
jfranck@1313: * it directly. You can also move back to the IN_PROGRESS sate using reset().
jfranck@1313: *
jfranck@1313: *
This is NOT part of any supported API. If you write code that depends
jfranck@1313: * on this, you do so at your own risk. This code and its internal interfaces
jfranck@1313: * are subject to change or deletion without notice.
jfranck@1313: */
jfranck@1313: public class Annotations {
jfranck@1313:
jfranck@1313: private static final List NOT_STARTED = List.of(null);
jfranck@1313: private static final List IN_PROGRESS = List.of(null);
jfranck@1313: /*
jfranck@1313: * This field should never be null
jfranck@1313: */
jfranck@1313: private List attributes = NOT_STARTED;
jfranck@1313: /*
jfranck@1313: * The Symbol this Annotatios belong to
jfranck@1313: */
jfranck@1313: private final Symbol s;
jfranck@1313:
jfranck@1313: public Annotations(Symbol s) {
jfranck@1313: this.s = s;
jfranck@1313: }
jfranck@1313:
jfranck@1313: public List getAttributes() {
jfranck@1313: return filterSentinels(attributes);
jfranck@1313: }
jfranck@1313:
jfranck@1313: public void setAttributes(List a) {
jfranck@1313: Assert.check(pendingCompletion() || !isStarted());
jfranck@1313: if (a == null) {
jfranck@1313: throw new NullPointerException();
jfranck@1313: }
jfranck@1313: attributes = a;
jfranck@1313: }
jfranck@1313:
jfranck@1313: public void setAttributes(Annotations other) {
jfranck@1313: if (other == null) {
jfranck@1313: throw new NullPointerException();
jfranck@1313: }
jfranck@1313: setAttributes(other.getAttributes());
jfranck@1313: }
jfranck@1313:
jfranck@1313: public void setAttributesWithCompletion(final Annotate.AnnotateRepeatedContext ctx) {
jfranck@1313: Assert.check(pendingCompletion() || (!isStarted() && s.kind == PCK));
jfranck@1313:
jfranck@1313: Map> annotated = ctx.annotated;
jfranck@1313: boolean atLeastOneRepeated = false;
jfranck@1313: List buf = List.nil();
jfranck@1313: for (ListBuffer lb : annotated.values()) {
jfranck@1313: if (lb.size() == 1) {
jfranck@1313: buf = buf.prepend(lb.first());
jfranck@1313: } else { // repeated
jfranck@1313: buf = buf.prepend(new Placeholder(lb.toList(), s));
jfranck@1313: atLeastOneRepeated = true;
jfranck@1313: }
jfranck@1313: }
jfranck@1313:
jfranck@1313: // Add non-repeating attributes
jfranck@1313: setAttributes(buf.reverse());
jfranck@1313:
jfranck@1313: if (atLeastOneRepeated) {
jfranck@1313: // The Symbol s is now annotated with a combination of
jfranck@1313: // finished non-repeating annotations and placeholders for
jfranck@1313: // repeating annotations.
jfranck@1313: //
jfranck@1313: // We need to do this in two passes because when creating
jfranck@1313: // a container for a repeating annotation we must
jfranck@1313: // guarantee that the @ContainedBy on the
jfranck@1313: // contained annotation is fully annotated
jfranck@1313: //
jfranck@1313: // The way we force this order is to do all repeating
jfranck@1313: // annotations in a pass after all non-repeating are
jfranck@1313: // finished. This will work because @ContainedBy
jfranck@1313: // is non-repeating and therefore will be annotated in the
jfranck@1313: // fist pass.
jfranck@1313:
jfranck@1313: // Queue a pass that will replace Attribute.Placeholders
jfranck@1313: // with Attribute.Compound (made from synthesized containers).
jfranck@1313: ctx.annotateRepeated(new Annotate.Annotator() {
jfranck@1313:
jfranck@1313: @Override
jfranck@1313: public String toString() {
jfranck@1313: return "repeated annotation pass of: " + s + " in: " + s.owner;
jfranck@1313: }
jfranck@1313:
jfranck@1313: @Override
jfranck@1313: public void enterAnnotation() {
jfranck@1313: complete(ctx);
jfranck@1313: }
jfranck@1313: });
jfranck@1313: }
jfranck@1313: }
jfranck@1313:
jfranck@1313: public Annotations reset() {
jfranck@1313: attributes = IN_PROGRESS;
jfranck@1313: return this;
jfranck@1313: }
jfranck@1313:
jfranck@1313: public boolean isEmpty() {
jfranck@1313: return !isStarted()
jfranck@1313: || pendingCompletion()
jfranck@1313: || attributes.isEmpty();
jfranck@1313: }
jfranck@1313:
jfranck@1313: public boolean pendingCompletion() {
jfranck@1313: return attributes == IN_PROGRESS;
jfranck@1313: }
jfranck@1313:
jfranck@1313: public Annotations append(List l) {
jfranck@1313: attributes = filterSentinels(attributes);
jfranck@1313:
jfranck@1313: if (l.isEmpty()) {
jfranck@1313: ; // no-op
jfranck@1313: } else if (attributes.isEmpty()) {
jfranck@1313: attributes = l;
jfranck@1313: } else {
jfranck@1313: attributes = attributes.appendList(l);
jfranck@1313: }
jfranck@1313: return this;
jfranck@1313: }
jfranck@1313:
jfranck@1313: public Annotations prepend(List l) {
jfranck@1313: attributes = filterSentinels(attributes);
jfranck@1313:
jfranck@1313: if (l.isEmpty()) {
jfranck@1313: ; // no-op
jfranck@1313: } else if (attributes.isEmpty()) {
jfranck@1313: attributes = l;
jfranck@1313: } else {
jfranck@1313: attributes = attributes.prependList(l);
jfranck@1313: }
jfranck@1313: return this;
jfranck@1313: }
jfranck@1313:
jfranck@1313: private List filterSentinels(List a) {
jfranck@1313: return (a == IN_PROGRESS || a == NOT_STARTED)
jfranck@1313: ? List.nil()
jfranck@1313: : a;
jfranck@1313: }
jfranck@1313:
jfranck@1313: private boolean isStarted() {
jfranck@1313: return attributes != NOT_STARTED;
jfranck@1313: }
jfranck@1313:
jfranck@1313: private List getPlaceholders() {
jfranck@1313: List res = List.nil();
jfranck@1313: for (Attribute.Compound a : filterSentinels(attributes)) {
jfranck@1313: if (a instanceof Placeholder) {
jfranck@1313: res = res.prepend(a);
jfranck@1313: }
jfranck@1313: }
jfranck@1313: return res.reverse();
jfranck@1313: }
jfranck@1313:
jfranck@1313: /*
jfranck@1313: * Replace Placeholders for repeating annotations with their containers
jfranck@1313: */
jfranck@1313: private void complete(Annotate.AnnotateRepeatedContext ctx) {
jfranck@1313: Assert.check(!pendingCompletion());
jfranck@1313: Log log = ctx.log;
jfranck@1313: Env env = ctx.env;
jfranck@1313: JavaFileObject oldSource = log.useSource(env.toplevel.sourcefile);
jfranck@1313: try {
jfranck@1313:
jfranck@1313: if (isEmpty()) {
jfranck@1313: return;
jfranck@1313: }
jfranck@1313:
jfranck@1313: List result = List.nil();
jfranck@1313: for (Attribute.Compound a : getAttributes()) {
jfranck@1313: if (a instanceof Placeholder) {
jfranck@1313: Attribute.Compound replacement = replaceOne((Placeholder) a, ctx);
jfranck@1313:
jfranck@1313: if (null != replacement) {
jfranck@1313: result = result.prepend(replacement);
jfranck@1313: }
jfranck@1313: } else {
jfranck@1313: result = result.prepend(a);
jfranck@1313: }
jfranck@1313: }
jfranck@1313:
jfranck@1313: attributes = result.reverse();
jfranck@1313:
jfranck@1313: Assert.check(Annotations.this.getPlaceholders().isEmpty());
jfranck@1313: } finally {
jfranck@1313: log.useSource(oldSource);
jfranck@1313: }
jfranck@1313: }
jfranck@1313:
jfranck@1313: private Attribute.Compound replaceOne(Placeholder placeholder, Annotate.AnnotateRepeatedContext ctx) {
jfranck@1313: Log log = ctx.log;
jfranck@1313:
jfranck@1313: // Process repeated annotations
jfranck@1313: Attribute.Compound validRepeated =
jfranck@1313: ctx.processRepeatedAnnotations(placeholder.getPlaceholderFor());
jfranck@1313:
jfranck@1313: if (validRepeated != null) {
jfranck@1313: // Check that the container isn't manually
jfranck@1313: // present along with repeated instances of
jfranck@1313: // its contained annotation.
jfranck@1313: ListBuffer manualContainer = ctx.annotated.get(validRepeated.type.tsym);
jfranck@1313: if (manualContainer != null) {
jfranck@1313: log.error(ctx.pos.get(manualContainer.first()), "invalid.containedby.annotation.repeated.and.container.present",
jfranck@1313: manualContainer.first().type.tsym);
jfranck@1313: }
jfranck@1313: }
jfranck@1313:
jfranck@1313: // A null return will delete the Placeholder
jfranck@1313: return validRepeated;
jfranck@1313:
jfranck@1313: }
jfranck@1313:
jfranck@1313: private static class Placeholder extends Attribute.Compound {
jfranck@1313:
jfranck@1313: private List placeholderFor;
jfranck@1313: private Symbol on;
jfranck@1313:
jfranck@1313: public Placeholder(List placeholderFor, Symbol on) {
jfranck@1313: super(Type.noType, List.>nil());
jfranck@1313: this.placeholderFor = placeholderFor;
jfranck@1313: this.on = on;
jfranck@1313: }
jfranck@1313:
jfranck@1313: @Override
jfranck@1313: public String toString() {
jfranck@1313: return "";
jfranck@1313: }
jfranck@1313:
jfranck@1313: public List getPlaceholderFor() {
jfranck@1313: return placeholderFor;
jfranck@1313: }
jfranck@1313: }
jfranck@1313: }