/*
    * 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.plugins.assembly.interpolation;
  
  import java.io.File;
  
  import org.apache.maven.plugins.assembly.AssemblerConfigurationSource;
  import org.apache.maven.plugins.assembly.io.DefaultAssemblyReader;
  import org.apache.maven.plugins.assembly.utils.InterpolationConstants;
  import org.apache.maven.project.MavenProject;
  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;
  import org.codehaus.plexus.interpolation.PrefixAwareRecursionInterceptor;
  import org.codehaus.plexus.interpolation.fixed.FixedStringSearchInterpolator;
  import org.codehaus.plexus.interpolation.fixed.InterpolationState;
  
  /**
   *
   */
  public class AssemblyExpressionEvaluator implements ExpressionEvaluator {
  
      private final AssemblerConfigurationSource configSource;
  
      private final FixedStringSearchInterpolator interpolator;
  
      private final PrefixAwareRecursionInterceptor interceptor;
  
      public AssemblyExpressionEvaluator(AssemblerConfigurationSource configSource) {
          this.configSource = configSource;
  
          final MavenProject project = configSource.getProject();
          final FixedStringSearchInterpolator projectInterpolator =
                  DefaultAssemblyReader.createProjectInterpolator(project);
          interpolator = AssemblyInterpolator.fullInterpolator(project, projectInterpolator, configSource);
          interceptor = new PrefixAwareRecursionInterceptor(InterpolationConstants.PROJECT_PREFIXES, true);
      }
  
      @Override
      public File alignToBaseDirectory(File f) {
          String basePath = configSource.getBasedir().getAbsolutePath();
          String path = f.getPath();
  
          if (!f.isAbsolute() && !path.startsWith(basePath)) {
              return new File(configSource.getBasedir(), path);
          } else {
              return f;
          }
      }
  
      @Override
      public Object evaluate(String expression) throws ExpressionEvaluationException {
          InterpolationState is = new InterpolationState();
          is.setRecursionInterceptor(interceptor);
          return interpolator.interpolate(expression, is);
      }
  }