import com.google.gwt.core.ext.linker.CompilationResult; //导入依赖的package包/类
@Override
protected Collection<Artifact<?>> doEmitCompilation(TreeLogger logger,
    LinkerContext context, CompilationResult result, ArtifactSet artifacts)
    throws UnableToCompleteException {

  String[] js = result.getJavaScript();
  if (js.length != 1) {
    logger.branch(TreeLogger.ERROR, getMultiFragmentWarningMessage(), null);
    throw new UnableToCompleteException();
  }

  Collection<Artifact<?>> toReturn = new ArrayList<Artifact<?>>();
  toReturn.add(new Script(result.getStrongName(), js[0]));
  toReturn.addAll(emitSelectionInformation(result.getStrongName(), result));
  return toReturn;
}
 

import com.google.gwt.core.ext.linker.CompilationResult; //导入依赖的package包/类
@Override
public ArtifactSet link(
    TreeLogger logger, LinkerContext context, ArtifactSet artifacts, boolean onePermutation)
    throws UnableToCompleteException {
  ArtifactSet toReturn = new ArtifactSet(artifacts);
  ArtifactSet writableArtifacts = new ArtifactSet(artifacts);
  boolean export = getExportProperty(context);

  for (CompilationResult result : toReturn.find(CompilationResult.class)) {
    String[] js = result.getJavaScript();
    checkArgument(js.length == 1, "MinimalLinker doesn't support GWT.runAsync");

    String output = formatOutput(js[0], export);
    toReturn.add(emitString(logger, output, context.getModuleName() + ".js"));
  }

  for (SymbolMapsLinker.ScriptFragmentEditsArtifact ea :
      writableArtifacts.find(SymbolMapsLinker.ScriptFragmentEditsArtifact.class)) {
    toReturn.add(ea);
  }
  return toReturn;
}
 

import com.google.gwt.core.ext.linker.CompilationResult; //导入依赖的package包/类
@Override
public ArtifactSet link(TreeLogger logger, LinkerContext context,
    ArtifactSet artifacts) throws UnableToCompleteException {
    ArtifactSet toLink = new ArtifactSet(artifacts);

    // Mask the stub manifest created by the generator
    for (EmittedArtifact res : toLink.find(EmittedArtifact.class)) {
        if (res.getPartialPath().endsWith(".gadget.xml")) {
            manifestArtifact = res;
            toLink.remove(res);

            break;
        }
    }

    if (manifestArtifact == null) {
        if (artifacts.find(CompilationResult.class).isEmpty()) {
            // Maybe hosted mode or junit, defer to XSLinker.
            return new XSLinker().link(logger, context, toLink);
        } else {
            // When compiling for web mode, enforce that the manifest is present.
            logger.log(TreeLogger.ERROR,
                "No gadget manifest found in ArtifactSet.");
            throw new UnableToCompleteException();
        }
    }

    return super.link(logger, context, toLink);
}
 

import com.google.gwt.core.ext.linker.CompilationResult; //导入依赖的package包/类
@Override
public ArtifactSet link( TreeLogger logger, LinkerContext context,
        ArtifactSet artifacts ) throws UnableToCompleteException {

    ArtifactSet toReturn = new ArtifactSet( artifacts );
    out = new DefaultTextOutput( true );
    long compilationTime = System.currentTimeMillis();
    out.print( "(function(){" );
    out.newline();

    // get compilation result
    Set<CompilationResult> results = artifacts
        .find( CompilationResult.class );
    if( results.size() == 0 ) {
        logger.log( TreeLogger.WARN, "Requested 0 permutations" );
        return toReturn;
    }

    CompilationResult result = results.iterator().next();

    // get the generated javascript
    String[] javaScript = result.getJavaScript();
    out.print( "var $wnd;var $doc;" );
    out.print( "var $moduleName, $moduleBase;" );
    out.newline();
    out.print( "if(typeof(window)!='undefined'){$wnd=window;$doc=$wnd.document;}" );
    out.newline();
    out.print( "if(typeof(navigator)=='undefined'){navigator={};navigator.userAgent='timobile';$doc={};$doc.documentMode=''; }" );
    out.newline();
    out.print( "var $gwt_version = \"" + About.getGwtVersionNum() + "\";" );
    out.newlineOpt();
    out.print( context.optimizeJavaScript( logger, javaScript[0] ) );
    out.newline();
    out.print( "var $stats = function(){};" );
    out.newline();
    out.print( "var $sessionId = function(){};" );
    out.newline();
    out.print( "$strongName = '" + result.getStrongName() + "';" );
    out.newline();
    out.print( "$ti4jCompilationDate = " + compilationTime + ";" );
    out.newline();
    out.print( "gwtOnLoad(null,'" + context.getModuleName() + "',null);" );
    out.newline();
    out.print( "})();" );
    out.newline();

    toReturn.add( emitString( logger, out.toString(), generateJavaScriptPath( context ) ) );

    // toReturn.add(emitString(logger, Long.toString(compilationTime),
    // APP_COMPILATION_FILE_NAME));

    return toReturn;
}