platform/lang-api/src/com/intellij/refactoring/rename/RenameInputValidatorRegistry.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.
 */

/**
 * @author Dmitry Avdeev
 */
package com.intellij.refactoring.rename;

import com.intellij.openapi.extensions.Extensions;
import com.intellij.openapi.util.Condition;
import com.intellij.psi.PsiElement;
import com.intellij.util.Function;
import com.intellij.util.ProcessingContext;
import org.jetbrains.annotations.Nullable;

public class RenameInputValidatorRegistry {
  private RenameInputValidatorRegistry() {
  }

  @Nullable
  public static Condition<String> getInputValidator(final PsiElement element) {
    for(final RenameInputValidator validator: Extensions.getExtensions(RenameInputValidator.EP_NAME)) {
      final ProcessingContext context = new ProcessingContext();
      if (validator.getPattern().accepts(element, context)) {
        return new Condition<String>() {
          @Override
          public boolean value(final String s) {
            return validator.isInputValid(s, element, context);
          }
        };
      }
    }
    return null;
  }

  @Nullable
  public static Function<String, String> getInputErrorValidator(final PsiElement element) {
    for(final RenameInputValidator validator: Extensions.getExtensions(RenameInputValidator.EP_NAME)) {
      if (!(validator instanceof RenameInputValidatorEx)) continue;
      final ProcessingContext context = new ProcessingContext();
      if (validator.getPattern().accepts(element, context)) {
        return new Function<String, String>() {
          @Override
          public String fun(String newName) {
            return ((RenameInputValidatorEx)validator).getErrorMessage(newName, element.getProject());
          }
        };
      }
    }
    return null;
  }
}