compiler/java/com/google/dart/compiler/parser/DartPrefixParser.java

/*
 * Copyright 2012 Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
 * 
 * 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.
 */
package com.google.dart.compiler.parser;

import com.google.dart.compiler.DartCompilerListener;
import com.google.dart.compiler.Source;
import com.google.dart.compiler.ast.DartIdentifier;
import com.google.dart.compiler.ast.DartImportDirective;
import com.google.dart.compiler.ast.DartStringLiteral;
import com.google.dart.compiler.metrics.CompilerMetrics;

import java.util.Set;

/**
 * An extension of {@link DartParser} that updates the prefixes collection
 */
public class DartPrefixParser extends DartParser {

  private final Set<String> prefixes;

  public DartPrefixParser(
      Source source,
      String sourceCode,
      boolean isDietParse,
      Set<String> prefixes,
      DartCompilerListener listener,
      CompilerMetrics compilerMetrics) {
    super(source, sourceCode, isDietParse, prefixes, listener, compilerMetrics);
    this.prefixes = prefixes;
  }

  @Override
  protected DartImportDirective parseImportDirective() {
    DartImportDirective directive = super.parseImportDirective();
    DartIdentifier prefix = directive.getPrefix();
    if (prefix != null) {
      prefixes.add(prefix.getName());
    }
    return directive;
  }

  @SuppressWarnings("deprecation")
  @Override
  protected DartImportDirective parseObsoleteImportDirective() {
    DartImportDirective directive = super.parseObsoleteImportDirective();
    DartStringLiteral oldPrefix = directive.getOldPrefix();
    if (oldPrefix != null) {
      prefixes.add(oldPrefix.getValue());
    }
    return directive;
  }
}