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Powerful multi-pass preprocessor to process directives situated in C-styled commentaries

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/*
 * Copyright 2002-2019 Igor Maznitsa (http://www.igormaznitsa.com)
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 com.igormaznitsa.jcp.directives;

import com.igormaznitsa.jcp.containers.PreprocessingFlag;
import com.igormaznitsa.jcp.context.PreprocessingState;
import com.igormaznitsa.jcp.context.PreprocessorContext;

/**
 * The class implements the //#_endif directive handler
 *
 * @author Igor Maznitsa ([email protected])
 */
public class GlobalEndIfDirectiveHandler extends AbstractDirectiveHandler {

  @Override

  public String getName() {
    return "_endif";
  }

  @Override
  public boolean executeOnlyWhenExecutionAllowed() {
    return false;
  }

  @Override

  public String getReference() {
    return "end " + DIRECTIVE_PREFIX + "_if.." + DIRECTIVE_PREFIX + "_endif control structure";
  }

  @Override
  public boolean isGlobalPhaseAllowed() {
    return true;
  }

  @Override
  public boolean isPreprocessingPhaseAllowed() {
    return false;
  }

  @Override

  public AfterDirectiveProcessingBehaviour execute(final String string,
                                                   final PreprocessorContext context) {
    final PreprocessingState state = context.getPreprocessingState();
    if (state.isIfStackEmpty()) {
      throw context
          .makeException("Detected " + getFullName() + " without " + DIRECTIVE_PREFIX + "_if",
              null);
    }

    if (!state.isDirectiveCanBeProcessed() && state.isAtActiveIf()) {
      state.getPreprocessingFlags().remove(PreprocessingFlag.IF_CONDITION_FALSE);
    }

    state.popIf();

    return AfterDirectiveProcessingBehaviour.PROCESSED;
  }
}