plugins/maven/maven2-server-impl/src/org/jetbrains/idea/maven/server/embedder/CustomModelInterpolator.java

/*
 * Copyright 2000-2009 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.idea.maven.server.embedder;

import org.apache.maven.model.Model;
import org.apache.maven.project.ProjectBuilderConfiguration;
import org.apache.maven.project.interpolation.ModelInterpolationException;
import org.apache.maven.project.interpolation.StringSearchModelInterpolator;
import org.apache.maven.project.path.DefaultPathTranslator;

import java.io.File;

public class CustomModelInterpolator extends StringSearchModelInterpolator {
  public CustomModelInterpolator() {
  }

  public CustomModelInterpolator(DefaultPathTranslator pathTranslator) {
    super(pathTranslator);
  }

  @Override
  protected void interpolateObject(Object obj, Model model, File projectDir, ProjectBuilderConfiguration config, boolean debugEnabled)
    throws ModelInterpolationException {
    // IDEA-74131 avoid concurrent access to the static cache in StringSearchModelInterpolator
    synchronized (CustomModelInterpolator.class) {
      try {
        super.interpolateObject(obj, model, projectDir, config, debugEnabled);
      }
      catch (NullPointerException e) {
        // npe may be thrown from here:
        //at org.apache.maven.project.interpolation.StringSearchModelInterpolator$InterpolateObjectAction.isQualifiedForInterpolation(StringSearchModelInterpolator.java:344)
        //at org.apache.maven.project.interpolation.StringSearchModelInterpolator$InterpolateObjectAction.traverseObjectWithParents(StringSearchModelInterpolator.java:172)
        //at org.apache.maven.project.interpolation.StringSearchModelInterpolator$InterpolateObjectAction.traverseObjectWithParents(StringSearchModelInterpolator.java:328)
        //at org.apache.maven.project.interpolation.StringSearchModelInterpolator$InterpolateObjectAction.run(StringSearchModelInterpolator.java:135)
        //at org.apache.maven.project.interpolation.StringSearchModelInterpolator$InterpolateObjectAction.run(StringSearchModelInterpolator.java:102)
        throw new ModelInterpolationException("Cannot interpolate", e);
      }
    }
  }
}