/*
    * 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.basepom.mojo.propertyhelper.macros;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  
  import org.basepom.mojo.propertyhelper.FieldContext;
  import org.basepom.mojo.propertyhelper.ValueProvider;
  import org.basepom.mojo.propertyhelper.definitions.MacroDefinition;
  
  import java.util.Objects;
  import java.util.Optional;
  
  import org.codehaus.plexus.component.annotations.Component;
  
  @Component(role = MacroType.class, hint = "demo")
  public class DemoMacro
      implements MacroType {
  
      @Override
      public Optional<String> getValue(final MacroDefinition macroDefinition,
          final ValueProvider valueProvider,
          final FieldContext context) {
          checkNotNull(valueProvider, "valueProvider is null");
          checkNotNull(context, "context is null");
  
          final String type = Objects.requireNonNullElse(macroDefinition.getProperties().get("type"), "static");
          if ("static".equals(type)) {
              return Optional.of("static-value");
          } else if ("property".equals(type)) {
              return valueProvider.getValue();
          } else {
              return Optional.ofNullable(macroDefinition.getProperties().get("value"));
          }
      }
  }