org.snapscript.tree.ImportList Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of snap Show documentation
Dynamic scripting for the JVM
The newest version!
package org.snapscript.tree;

import org.snapscript.core.Compilation;
import org.snapscript.core.Context;
import org.snapscript.core.Statement;
import org.snapscript.core.link.ExceptionStatement;
import org.snapscript.core.module.Module;
import org.snapscript.core.module.Path;
import org.snapscript.core.scope.Scope;
import org.snapscript.core.trace.Trace;
import org.snapscript.core.trace.TraceInterceptor;

public class ImportList implements Compilation {

   private final Statement[] statements;
   private final Qualifier qualifier;
   private final Qualifier[] names;

   public ImportList(Qualifier qualifier, Qualifier... names) {
      this.statements = new Statement[names.length];
      this.qualifier = qualifier;
      this.names = names;
   }

   @Override
   public Statement compile(Module module, Path path, int line) throws Exception {
      Scope scope = module.getScope();
      Context context = module.getContext();
      TraceInterceptor interceptor = context.getInterceptor();
      Trace trace = Trace.getImport(module, path, line);
      String prefix = qualifier.getQualifier();

      for(int i = 0; i < names.length; i++) {
         EntryQualifier entry = new EntryQualifier(prefix, names[i]);
         ImportBuilder builder = new ImportBuilder(entry, null);

         try {
            statements[i] = builder.create(module, path, line);
         } catch (Exception cause) {
            interceptor.traceCompileError(scope, trace, cause);
            return new ExceptionStatement("Could not process import", cause);
         }
      }
      return new StatementBlock(statements);
   }

   private static class EntryQualifier implements Qualifier {

      private final String target;
      private final String prefix;

      public EntryQualifier(String prefix, Qualifier target) {
         this.target = target.getQualifier();
         this.prefix = prefix;
      }

      @Override
      public String getQualifier() {
         return prefix;
      }

      @Override
      public String getLocation() {
         return prefix;
      }

      @Override
      public String getTarget() {
         return target;
      }

      @Override
      public String getName() {
         return target;
      }
   }
}