/*
    * 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 org.apache.maven.plugin.internal;
  
  import org.apache.maven.plugin.descriptor.MojoDescriptor;
  import org.apache.maven.plugin.descriptor.Parameter;
  import org.apache.maven.shared.utils.logging.MessageBuilder;
  import org.apache.maven.shared.utils.logging.MessageUtils;
  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;
  import org.codehaus.plexus.configuration.PlexusConfiguration;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Common implementations for plugin parameters configuration validation.
   *
   * @author Slawomir Jaranowski
   */
  abstract class AbstractMavenPluginParametersValidator implements MavenPluginConfigurationValidator {
  
      protected final Logger logger = LoggerFactory.getLogger(getClass());
  
      protected boolean isValueSet(PlexusConfiguration config, ExpressionEvaluator expressionEvaluator) {
          if (config == null) {
              return false;
          }
  
          // there are sub items ... so configuration is declared
          if (config.getChildCount() > 0) {
              return true;
          }
  
          String strValue = config.getValue();
  
          if (strValue == null || strValue.isEmpty()) {
              return false;
          }
  
          if (isIgnoredProperty(strValue)) {
              return false;
          }
  
          // for declaration like @Parameter( property = "config.property" )
          // the value will contain ${config.property}
  
          try {
              return expressionEvaluator.evaluate(strValue) != null;
          } catch (ExpressionEvaluationException e) {
              // not important
              // will be reported during Mojo fields populate
          }
  
          // fallback - in case of error in expressionEvaluator
          return false;
      }
  
      @Override
      public final void validate(
              MojoDescriptor mojoDescriptor,
              PlexusConfiguration pomConfiguration,
              ExpressionEvaluator expressionEvaluator) {
          if (!logger.isWarnEnabled()) {
              return;
          }
  
          doValidate(mojoDescriptor, pomConfiguration, expressionEvaluator);
      }
  
      protected abstract void doValidate(
              MojoDescriptor mojoDescriptor,
              PlexusConfiguration pomConfiguration,
              ExpressionEvaluator expressionEvaluator);
  
      protected boolean isIgnoredProperty(String strValue) {
          return false;
      }
  
      protected abstract String getParameterLogReason(Parameter parameter);
  
      protected void logParameter(Parameter parameter) {
          MessageBuilder messageBuilder = MessageUtils.buffer()
                  .warning("Parameter '")
                 .warning(parameter.getName())
                 .warning('\'');
 
         if (parameter.getExpression() != null) {
             String userProperty = parameter.getExpression().replace("${", "'").replace('}', '\'');
             messageBuilder.warning(" (user property ").warning(userProperty).warning(")");
         }
 
         messageBuilder.warning(" ").warning(getParameterLogReason(parameter));
 
         logger.warn(messageBuilder.toString());
     }
 }