TypeSafeTableCellRenderer.java

/*
 * Copyright 2000-2016 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 com.intellij.vcs.log.ui.render;

import org.jetbrains.annotations.NotNull;

import javax.swing.*;
import javax.swing.table.TableCellRenderer;
import java.awt.*;

import static com.intellij.util.ObjectUtils.notNull;

public abstract class TypeSafeTableCellRenderer<T> implements TableCellRenderer {

  @Override
  public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    return getTableCellRendererComponentImpl(table, getValue(notNull(value)), isSelected, hasFocus, row, column);
  }

  @NotNull
  protected T getValue(@NotNull Object value) {
    //noinspection unchecked
    return (T)value;
  }


  protected abstract Component getTableCellRendererComponentImpl(@NotNull JTable table,
                                                                 @NotNull T value,
                                                                 boolean isSelected,
                                                                 boolean hasFocus,
                                                                 int row,
                                                                 int column);
}