org.eclipse.scout.sdk.core.ecj/src/main/java/org/eclipse/scout/sdk/core/model/ecj/PackageWithEcj.java

/*
 * Copyright (c) 2010-2020 BSI Business Systems Integration AG.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     BSI Business Systems Integration AG - initial API and implementation
 */
package org.eclipse.scout.sdk.core.model.ecj;

import java.util.List;

import org.eclipse.scout.sdk.core.model.api.IPackage;
import org.eclipse.scout.sdk.core.model.api.ISourceRange;
import org.eclipse.scout.sdk.core.model.api.internal.PackageImplementor;
import org.eclipse.scout.sdk.core.model.spi.AbstractJavaEnvironment;
import org.eclipse.scout.sdk.core.model.spi.AnnotationSpi;
import org.eclipse.scout.sdk.core.model.spi.JavaElementSpi;
import org.eclipse.scout.sdk.core.model.spi.PackageSpi;
import org.eclipse.scout.sdk.core.model.spi.TypeSpi;
import org.eclipse.scout.sdk.core.util.FinalValue;
import org.eclipse.scout.sdk.core.util.JavaTypes;
import org.eclipse.scout.sdk.core.util.Strings;

/**
 *
 */
public class PackageWithEcj extends AbstractJavaElementWithEcj<IPackage> implements PackageSpi {
  private final String m_name;
  private final FinalValue<TypeSpi> m_packageInfo;

  protected PackageWithEcj(AbstractJavaEnvironment env, String name) {
    super(env);
    m_name = name;
    m_packageInfo = new FinalValue<>();
  }

  @Override
  public JavaElementSpi internalFindNewElement() {
    return getJavaEnvironment().getPackage(getElementName());
  }

  @Override
  protected IPackage internalCreateApi() {
    return new PackageImplementor(this);
  }

  @Override
  public String getElementName() {
    return m_name;
  }

  @Override
  public ISourceRange getSource() {
    return null;
  }

  @Override
  public TypeSpi getPackageInfo() {
    return m_packageInfo.computeIfAbsentAndGet(() -> getJavaEnvironment().findType(getElementName() + JavaTypes.C_DOT + JavaTypes.PackageInfo));
  }

  @Override
  public PackageSpi getParentPackage() {
    if (Strings.isBlank(m_name)) {
      // this is the default package. it has no parent package.
      return null;
    }
    int lastDot = m_name.lastIndexOf(JavaTypes.C_DOT);
    if (lastDot < 0) {
      // the default package is the parent
      return javaEnvWithEcj().createDefaultPackage();
    }
    return javaEnvWithEcj().createPackage(m_name.substring(0, lastDot));
  }

  @Override
  public List<? extends AnnotationSpi> getAnnotations() {
    // the AnnotationQuery retrieves package annotations from the package-info type. Use #getPackageInfo.
    // the PackageSpi must therefore not implement this method.
    throw new UnsupportedOperationException();
  }
}