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Output Kythe mapping metadata in the J2ObjC header generator.
Change on 2018/06/15 by duffin <duffin@google.com> ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=200768666
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99 changes: 99 additions & 0 deletions
99
translator/src/main/java/com/google/devtools/j2objc/gen/GeneratedSourceMappings.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,99 @@ | ||
| /* | ||
| * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
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| package com.google.devtools.j2objc.gen; | ||
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| import com.google.devtools.j2objc.ast.MethodDeclaration; | ||
| import com.google.devtools.j2objc.ast.Name; | ||
| import java.util.Collections; | ||
| import java.util.HashSet; | ||
| import java.util.Set; | ||
|
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| /** | ||
| * Contains byte-offset mappings between identifiers in a source .java file and their equivalents in | ||
| * a generated Objective-C header file. | ||
| * | ||
| * <p>These mappings may be converted to {@link | ||
| * com.google.devtools.j2objc.gen.KytheIndexingMetadata} objects to support cross-language links in | ||
| * <a href="http://kythe.io">Kythe.</a> | ||
| */ | ||
| public class GeneratedSourceMappings { | ||
|
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| /** Maps an identifier from a byte range in a source file and target file. */ | ||
| public static class Mapping { | ||
| private final String identifier; | ||
| private final int sourceBegin; | ||
| private final int sourceEnd; | ||
| private final int targetBegin; | ||
| private final int targetEnd; | ||
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| private Mapping( | ||
| String identifier, int sourceBegin, int sourceEnd, int targetBegin, int targetEnd) { | ||
| this.identifier = identifier; | ||
| this.sourceBegin = sourceBegin; | ||
| this.sourceEnd = sourceEnd; | ||
| this.targetBegin = targetBegin; | ||
| this.targetEnd = targetEnd; | ||
| } | ||
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| static Mapping fromMethodDeclaration( | ||
| MethodDeclaration methodDeclaration, int targetBegin, int targetEnd) { | ||
| assert methodDeclaration.getName() != null; | ||
| Name name = methodDeclaration.getName(); | ||
| int sourceBegin = name.getStartPosition(); | ||
| int sourceEnd = sourceBegin + name.getLength(); | ||
| return new Mapping(name.toString(), sourceBegin, sourceEnd, targetBegin, targetEnd); | ||
| } | ||
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| public String getIdentifier() { | ||
| return identifier; | ||
| } | ||
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| public int getSourceBegin() { | ||
| return sourceBegin; | ||
| } | ||
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| public int getSourceEnd() { | ||
| return sourceEnd; | ||
| } | ||
|
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| public int getTargetBegin() { | ||
| return targetBegin; | ||
| } | ||
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| public int getTargetEnd() { | ||
| return targetEnd; | ||
| } | ||
| } | ||
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| private final Set<Mapping> mappings = new HashSet<>(); | ||
| private int targetOffset = 0; | ||
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| public void addMethodMapping(MethodDeclaration methodDeclaration, int targetBegin, int length) { | ||
| mappings.add( | ||
| Mapping.fromMethodDeclaration(methodDeclaration, targetBegin, targetBegin + length)); | ||
| } | ||
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| public Set<Mapping> getMappings() { | ||
| return Collections.unmodifiableSet(mappings); | ||
| } | ||
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| public void setTargetOffset(int targetOffset) { | ||
| this.targetOffset = targetOffset; | ||
| } | ||
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| public int getTargetOffset() { | ||
| return targetOffset; | ||
| } | ||
| } |
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108
translator/src/main/java/com/google/devtools/j2objc/gen/KytheIndexingMetadata.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| /* | ||
| * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package com.google.devtools.j2objc.gen; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.stream.Collectors; | ||
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| /** | ||
| * Metadata required to create links for indexing in <a href="http://kythe.io">Kythe.</a> | ||
| * | ||
| * <p>The JSON objects produced by this class conform to the format expected by Kythe's | ||
| * postprocessing pipeline; this allows Kythe to create links from source .java files to generated | ||
| * .h files. | ||
| */ | ||
| public class KytheIndexingMetadata { | ||
|
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| /** | ||
| * A Vname is a unique identifier for a node in a Kythe semantic graph. | ||
| * | ||
| * <p>For more information, see <a href="https://kythe.io/docs/kythe-uri-spec.html">the Kythe | ||
| * documentation.</a> | ||
| */ | ||
| static class VName { | ||
| private final String corpus; | ||
| private final String path; | ||
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| private VName(String corpus, String path) { | ||
| this.corpus = corpus; | ||
| this.path = path; | ||
| } | ||
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| private String toJson() { | ||
| return String.format("{\"corpus\":\"%s\",\"path\":\"%s\"}", corpus, path); | ||
| } | ||
| } | ||
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| static class AnchorAnchorMetadata { | ||
| private final String type = "anchor_anchor"; | ||
| private final int sourceBegin; | ||
| private final int sourceEnd; | ||
| private final int targetBegin; | ||
| private final int targetEnd; | ||
| private final String edge = "/kythe/edge/imputes"; | ||
| private final VName sourceVName; | ||
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| AnchorAnchorMetadata( | ||
| int sourceBegin, | ||
| int sourceEnd, | ||
| int targetBegin, | ||
| int targetEnd, | ||
| String corpus, | ||
| String path) { | ||
| this.sourceBegin = sourceBegin; | ||
| this.sourceEnd = sourceEnd; | ||
| this.targetBegin = targetBegin; | ||
| this.targetEnd = targetEnd; | ||
| this.sourceVName = new VName(corpus, path); | ||
| } | ||
|
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| private String toJson() { | ||
| return String.format( | ||
| "{\"type\":\"%s\",\"source_begin\":%d,\"source_end\":%d,\"target_begin\":%d," | ||
| + "\"target_end\":%d,\"edge\":\"%s\",\"source_vname\":%s}", | ||
| type, sourceBegin, sourceEnd, targetBegin, targetEnd, edge, sourceVName.toJson()); | ||
| } | ||
| } | ||
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| private final String type = "kythe0"; | ||
| private final List<AnchorAnchorMetadata> meta = new ArrayList<>(); | ||
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| public void addAnchorAnchor( | ||
| int sourceBegin, | ||
| int sourceEnd, | ||
| int targetBegin, | ||
| int targetEnd, | ||
| String sourceCorpus, | ||
| String sourcePath) { | ||
| meta.add( | ||
| new AnchorAnchorMetadata( | ||
| sourceBegin, sourceEnd, targetBegin, targetEnd, sourceCorpus, sourcePath)); | ||
| } | ||
|
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| public boolean isEmpty() { | ||
| return meta.isEmpty(); | ||
| } | ||
|
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| public String toJson() { | ||
| StringBuilder stringBuilder = new StringBuilder(); | ||
| stringBuilder.append(String.format("{\"type\":\"%s\",\"meta\":[", type)); | ||
| stringBuilder.append( | ||
| meta.stream().map(AnchorAnchorMetadata::toJson).collect(Collectors.joining(","))); | ||
| stringBuilder.append("]}"); | ||
| return stringBuilder.toString(); | ||
| } | ||
| } |
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