Eclipse插件开发资源查找

• 介绍

我们在开发Eclipse插件的时候，需要查找类、接口等资源的时候，怎么办呢？本文介绍如何使用Eclipse自带的查找对话框来获取类路径。

• 例子

[codesyntax lang="java"]

/**
* http://surenpi.com
*/
package org.surenpi.dev.plugin.utill;

import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.search.SearchEngine;
import org.eclipse.jdt.ui.IJavaElementSearchConstants;
import org.eclipse.jdt.ui.JavaUI;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.SelectionDialog;

/**
 * @author surenpi.com
 * @since jdk1.6
 * 2015年9月24日
 */
public class SearchDialog {
  /**
   * 查找类
   * @param shell
   * @param multipleSelection
   * @param title 对话框标题
   * @param message
   * @return
   */
  public static Object[] searchType(Shell shell, int type, boolean multipleSelection,
      String title, String message){
    try {
      SelectionDialog dialog = JavaUI.createTypeDialog(shell,
          new ProgressMonitorDialog(shell),
          SearchEngine.createWorkspaceScope(), type,
          multipleSelection);
      
      dialog.setTitle(title);
      dialog.setMessage(message);
      
      if(dialog.open() == IDialogConstants.CANCEL_ID){
        return null;
      }
      
      return dialog.getResult();
    } catch (JavaModelException e) {
      e.printStackTrace();
    }
    
    return null;
  }
  
  public static Object[] searchClass(Shell shell, boolean multipleSelection,
      String title, String message){
    return searchType(shell, IJavaElementSearchConstants.CONSIDER_CLASSES,
        multipleSelection, title, message);
  }
  
  public static IType searchClass(Shell shell, String title, String message){
    Object[] result = searchClass(shell, false, title, message);
    
    if(result != null && result.length > 0){
      return (IType) result[0];
    }
    
    return null;
  }
  
  /**
   * 查找Action中的Module类
   * @param shell
   * @return
   */
  public static IType searchModuleClass(Shell shell){
    String title = "查找Module类";
    String message = "请选择PO或者VO作为Action的Module（ListModule）";
    
    return searchClass(shell, title, message);
  }
  
  public static Object[] searchInterface(Shell shell, boolean multipleSelection,
      String title, String message){
    return searchType(shell, IJavaElementSearchConstants.CONSIDER_INTERFACES,
        multipleSelection, title, message);
  }
  
  public static IType searchInterface(Shell shell, String title, String message){
    Object[] result = searchType(shell, IJavaElementSearchConstants.CONSIDER_INTERFACES,
        false, title, message);
    
    if(result != null && result.length > 0){
      return (IType) result[0];
    }
    
    return null;
  }
  
  /**
   * 查找Action中的Module类
   * @param shell
   * @return
   */
  public static IType searchInjectClass(Shell shell){
    String title = "查找依赖类";
    String message = "请选择服务";
    
    return searchInterface(shell, title, message);
  }
}

[/codesyntax]