ImportRewriteDisabler.java

/*
   Copyright 2016 Immutables Authors and Contributors

   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.immutables.value.processor.meta;

import com.google.common.base.Ascii;
import com.google.common.base.Splitter;
import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.PackageElement;

class ImportRewriteDisabler {
  private static final Splitter DOT_SPLITTER = Splitter.on('.');
  private static final String WARNING_START =
      "Import rewriter will be disabled for generated source files to not mess up with";

  static boolean shouldDisableFor(ValueType type) {
    Reporter reporter = type.constitution.protoclass().report();

    for (String segment : DOT_SPLITTER.split(type.constitution.implementationPackage())) {
      if (!segment.isEmpty() && Ascii.isUpperCase(segment.charAt(0))) {
        reporter.warning(WARNING_START + " uppercase package names");
        return true;
      }
    }

    Element element = type.constitution.protoclass().sourceElement();
    if (shouldDisableFor(reporter, element)) {
      return true;
    }

    for (ValueAttribute attribute : type.attributes) {
      if (Ascii.isUpperCase(attribute.names.get.charAt(0))) {
        reporter.warning(WARNING_START + " uppercase attribute names");
        return true;
      }
      if (attribute.containedTypeElement != null) {
        if (shouldDisableFor(reporter, attribute.containedTypeElement)) {
          return true;
        }
      }
    }

    for (ValueType nested : type.nested) {
      if (shouldDisableFor(nested)) {
        return true;
      }
    }
    return false;
  }

  private static boolean shouldDisableFor(Reporter reporter, Element element) {
    while (element != null) {
      if (element.getKind() == ElementKind.PACKAGE) {
        for (String segment : DOT_SPLITTER.split(((PackageElement) element).getQualifiedName())) {
          if (!segment.isEmpty() && Ascii.isUpperCase(segment.charAt(0))) {
            reporter.warning(WARNING_START + " uppercase package names");
            return true;
          }
        }
      }
      if (element.getKind().isClass() || element.getKind().isInterface()) {
        if (Ascii.isLowerCase(element.getSimpleName().charAt(0))) {
          reporter.warning(WARNING_START + " lowercase class names");
          return true;
        }
      }
      element = element.getEnclosingElement();
    }
    return false;
  }
}