Modifiers.java

/*
 * Copyright 2000-2016 JetBrains s.r.o.
 *
 * 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.
 */

package org.jetbrains.plugins.groovy.lang.parser.parsing.auxiliary.modifiers;

import com.intellij.lang.PsiBuilder;
import org.jetbrains.plugins.groovy.lang.lexer.GroovyTokenTypes;
import org.jetbrains.plugins.groovy.lang.lexer.TokenSets;
import org.jetbrains.plugins.groovy.lang.parser.GroovyElementTypes;
import org.jetbrains.plugins.groovy.lang.parser.GroovyParser;
import org.jetbrains.plugins.groovy.lang.parser.parsing.auxiliary.annotations.Annotation;
import org.jetbrains.plugins.groovy.lang.parser.parsing.statements.expressions.arithmetic.PathExpression;
import org.jetbrains.plugins.groovy.lang.parser.parsing.util.ParserUtils;

/**
 * @autor: Dmitry.Krasilschikov
 * @date: 16.03.2007
 */

/*
 * Modifiers ::= {modifier|annotation} (nls? {modifier|annotation})+
 */

public class Modifiers {

  public static boolean parse(PsiBuilder builder, GroovyParser parser) {
    return parse(builder, parser, false);
  }

  public static boolean parse(PsiBuilder builder, GroovyParser parser, boolean annotationsOnly) {

    PsiBuilder.Marker modifiersMarker = builder.mark();
    boolean hasModifiers = false;

    do {
      final PsiBuilder.Marker modifierListItem = builder.mark();

      if (hasModifiers) ParserUtils.getToken(builder, GroovyTokenTypes.mNLS);
      final boolean parsed = Annotation.parse(builder, parser) || (!annotationsOnly && parseModifier(builder));

      if (parsed) {
        if (PathExpression.isQualificationDot(builder)) {
          modifierListItem.rollbackTo();
          break;
        }
        else {
          modifierListItem.drop();
          hasModifiers = true;
        }
      }
      else {
        modifierListItem.rollbackTo();
        break;
      }
    }
    while (true);

    modifiersMarker.done(GroovyElementTypes.MODIFIERS);
    ParserUtils.getToken(builder, GroovyTokenTypes.mNLS);
    return hasModifiers;
  }

  public static boolean parseModifier(PsiBuilder builder) {
    if (TokenSets.MODIFIERS.contains(builder.getTokenType())) {
      builder.advanceLexer();
      return true;
    }
    return false;
  }
}