/*
 * Copyright 2000-2014 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.plugins.groovy.lang.psi.api.util;

import com.intellij.util.IncorrectOperationException;
import org.jetbrains.plugins.groovy.lang.psi.GroovyPsiElement;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrStatement;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrVariable;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrVariableDeclaration;

public interface GrVariableDeclarationOwner extends GroovyPsiElement {

  /**
   * Removes variable from its declaration. In case of alone variablein declaration,
   * it also will be removed.
   * @param variable to remove
   * @throws IncorrectOperationException in case the operation cannot be performed
   */
  void removeVariable(GrVariable variable);

  /**
   * Adds new variable declaration after anchor spectified. If anchor == null, adds variable at owner's first position
   * @param declaration declaration to insert 
   * @param anchor Anchor after which new variabler declaration will be placed
   * @return inserted variable declaration
   * @throws IncorrectOperationException in case the operation cannot be performed
   */
  GrVariableDeclaration addVariableDeclarationBefore(GrVariableDeclaration declaration, GrStatement anchor) throws IncorrectOperationException;

}
