Recompile unit with potential conflict/dependency on some top-level symbol.

compiler/java/com/google/dart/compiler/ast/LibraryUnit.java

Index: compiler/java/com/google/dart/compiler/ast/LibraryUnit.java
diff --git a/compiler/java/com/google/dart/compiler/ast/LibraryUnit.java b/compiler/java/com/google/dart/compiler/ast/LibraryUnit.java
index 0a18d76b65df4eb3ef6a263392fb6873f6542ca5..195f494141feb31b77f8e37d363db1de79cfb5b6 100644
--- a/compiler/java/com/google/dart/compiler/ast/LibraryUnit.java
+++ b/compiler/java/com/google/dart/compiler/ast/LibraryUnit.java
@@ -4,33 +4,22 @@
 
 package com.google.dart.compiler.ast;
 
-import com.google.common.io.CharStreams;
 import com.google.dart.compiler.DartCompiler;
 import com.google.dart.compiler.DartCompilerContext;
-import com.google.dart.compiler.DartCompilerListener;
 import com.google.dart.compiler.DartSource;
 import com.google.dart.compiler.LibraryDeps;
 import com.google.dart.compiler.LibrarySource;
-import com.google.dart.compiler.common.SourceInfo;
-import com.google.dart.compiler.metrics.DartEventType;
-import com.google.dart.compiler.metrics.Tracer;
-import com.google.dart.compiler.metrics.Tracer.TraceEvent;
-import com.google.dart.compiler.parser.DartParser;
-import com.google.dart.compiler.parser.DartScannerParserContext;
 import com.google.dart.compiler.resolver.Elements;
 import com.google.dart.compiler.resolver.LibraryElement;
 
 import java.io.IOException;
 import java.io.Reader;
 import java.io.Writer;
-import java.net.URI;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
-import java.util.Map.Entry;
 import java.util.Set;
 import java.util.concurrent.ConcurrentSkipListMap;
 
@@ -38,11 +27,6 @@ import java.util.concurrent.ConcurrentSkipListMap;
  * Represents the parsed source from a {@link LibrarySource}.
  */
 public class LibraryUnit {
-
-  // This is intentionally unparseable as Dart.
-  private static final String UNIT_SEPARATOR_NAME = "--- unit-name: ";
-  private static final String UNIT_SEPARATOR_URI = "--- unit-uri: ";
-
   private final LibrarySource libSource;
   private final LibraryNode selfSourcePath;
   private final Collection<LibraryNode> importPaths = new ArrayList<LibraryNode>();
@@ -56,7 +40,6 @@ public class LibraryUnit {
 
   private final LibraryElement element;
 
-  private Map<String, DartNode> topLevelNodes;
   private LibraryDeps deps;
 
   private LibraryNode entryNode;
@@ -235,136 +218,6 @@ public class LibraryUnit {
   }
 
   /**
-   * Loads this library's associated api. If the api file exists, this will result in the library
-   * being populated with "diet" units (i.e., {@link DartUnit#isDiet()} will return
-   * <code>true</code>).
-   *
-   * @return <code>true</code> if the library was loaded from its api
-   */
-  public boolean loadApi(DartCompilerContext context, DartCompilerListener listener)
-      throws IOException {
-    TraceEvent parseEvent =
-        Tracer.canTrace() ? Tracer.start(DartEventType.PARSE_API, "src", getSource().getUri()
-            .toString()) : null;
-    try {
-      final Reader r = context.getArtifactReader(libSource, "", DartCompiler.EXTENSION_API);
-      if (r == null) {
-        return false;
-      }
-
-      // Read the API file.
-      String srcCode = CharStreams.toString(r);
-      r.close();
-
-      // Split it up by unit.
-      int idx = srcCode.indexOf(UNIT_SEPARATOR_NAME);
-      while (idx != -1) {
-        int endIdx;
-
-        // Prepare unit name.
-        idx += UNIT_SEPARATOR_NAME.length();
-        endIdx = srcCode.indexOf('\n', idx);
-        String unitName = srcCode.substring(idx, endIdx);
-        idx = endIdx;
-
-        // Prepare unit URI.
-        idx = srcCode.indexOf(UNIT_SEPARATOR_URI, endIdx);
-        idx += UNIT_SEPARATOR_URI.length();
-        endIdx = srcCode.indexOf('\n', idx);
-        String unitUri = srcCode.substring(idx, endIdx);
-        idx = endIdx;
-
-        // Find next unit, may be end string.
-        endIdx = srcCode.indexOf(UNIT_SEPARATOR_NAME, idx);
-
-        // Parse diet source unit.
-        String code = endIdx != -1 ? srcCode.substring(idx, endIdx) : srcCode.substring(idx);
-        parseApiUnit(unitName, unitUri, code, libSource, listener);
-
-        // Process next unit.
-        idx = endIdx;
-      }
-
-      return true;
-    } finally {
-      Tracer.end(parseEvent);
-    }
-  }
-
-  /**
-   * Saves this library's contents to its associated api file.
-   */
-  public void saveApi(DartCompilerContext context) throws IOException {
-    Writer w = context.getArtifactWriter(libSource, "", DartCompiler.EXTENSION_API);
-    for (Entry<String, DartUnit> entry : units.entrySet()) {
-      String unitName = entry.getKey();
-      DartUnit unit = entry.getValue();
-      w.write(UNIT_SEPARATOR_NAME + unitName + "\n");
-      w.write(UNIT_SEPARATOR_URI + unit.getSource().getUri() + "\n");
-      w.write(unit.toDietSource());
-    }
-    w.close();
-  }
-
-  /**
-   * Populates this unit's class map. This can be called only once per unit, and must be called
-   * before {@link #getTopLevelNode(String)} and {@link #getTopLevelNodes()}.
-   */
-  public void populateTopLevelNodes() {
-    assert topLevelNodes == null;
-    topLevelNodes = new HashMap<String, DartNode>();
-
-    DartNodeTraverser<Void> visitor = new DartNodeTraverser<Void>() {
-      @Override
-      public Void visitClass(DartClass node) {
-        topLevelNodes.put(node.getClassName(), node);
-        return null;
-      }
-
-      @Override
-      public Void visitMethodDefinition(DartMethodDefinition node) {
-        // Method names are always identifiers, except for factories, which cannot appear
-        // in this context.
-        DartExpression name = node.getName();
-        if(name instanceof DartIdentifier) {
-          topLevelNodes.put(((DartIdentifier) name).getTargetName(), node);
-        } else {
-          // Visit the unknown node to generate a string for our use.
-          topLevelNodes.put(node.getName().toSource(), node);
-        }
-        return null;
-      }
-
-      @Override
-      public Void visitField(DartField node) {
-        topLevelNodes.put(node.getName().getTargetName(), node);
-        return null;
-      }
-    };
-
-    for (DartUnit unit : units.values()) {
-      visitor.visitUnit(unit);
-    }
-  }
-
-  /**
-   * Get an unmodifiable collection of the classes in this library. You must call
-   * {@link #populateTopLevelNodes()} before this method will work.
-   */
-  public Collection<DartNode> getTopLevelNodes() {
-    return Collections.unmodifiableCollection(topLevelNodes.values());
-  }
-
-  /**
-   * Gets the {@link DartClass} associated with the given name. You must call
-   * {@link #populateTopLevelNodes()} before this method will work.
-   */
-  public DartNode getTopLevelNode(String name) {
-    assert topLevelNodes != null;
-    return topLevelNodes.get(name);
-  }
-
-  /**
    * Return the declared entry method, if any
    *
    * @return the entry method or <code>null</code> if not defined
@@ -411,65 +264,4 @@ public class LibraryUnit {
     deps.write(writer);
     writer.close();
   }
-
-  private void parseApiUnit(final String unitName,
-      final String unitUri,
-      String srcCode,
-      final LibrarySource libSrc,
-      DartCompilerListener listener) {
-    // Dummy source for the api unit.
-    DartSource src = new DartSource() {
-      @Override
-      public LibrarySource getLibrary() {
-        return libSrc;
-      }
-
-      @Override
-      public String getName() {
-        return unitName;
-      }
-
-      @Override
-      public Reader getSourceReader() {
-        return null;
-      }
-
-      @Override
-      public URI getUri() {
-        return URI.create(unitUri);
-      }
-
-      @Override
-      public boolean exists() {
-        return true;
-      }
-
-      @Override
-      public long getLastModified() {
-        return 0;
-      }
-
-      @Override
-      public String getRelativePath() {
-        return unitName;
-      }
-    };
-
-    DartScannerParserContext parserContext = new DartScannerParserContext(src, srcCode, listener);
-    DartParser parser = new DartParser(parserContext, true);
-    DartUnit unit = parser.parseUnit(src);
-
-    // When parsing from an API file, generate and store the hash for top level
-    // classes while we have the string available.  Reduces the time needed to
-    // recompute this later with a visitor.
-    for (DartNode node : unit.getTopLevelNodes()) {
-      if (node instanceof DartClass) {
-        SourceInfo nodeInfo = node.getSourceInfo();
-        String nodeString = srcCode.substring(nodeInfo.getSourceStart(),
-                                              nodeInfo.getSourceStart()+nodeInfo.getSourceLength());
-        ((DartClass)node).setHash(nodeString.hashCode());
-      }
-    }
-    putUnit(unit);
-  }
 }