codegenoptionwizardpage.java

基于eclipse的工具开发代码

package com.cownew.studio.modelDev.wizards;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.jdt.ui.wizards.NewContainerWizardPage;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;

import com.cownew.studio.Activator;
import com.cownew.studio.modelDev.codeGen.CodeGeneratorInfo;
import com.cownew.studio.modelDev.codeGen.CodeGeneratorLoader;
import com.cownew.studio.modelDev.codeGen.IEntityModelCodeGenerator;

public class CodeGenOptionWizardPage extends NewContainerWizardPage
{
	private final String SETTINGPREFIX = CodeGenOptionWizardPage.class
			.getName();

	// 是否覆盖已有文件
	private final String OVERRIDEEXISTS = SETTINGPREFIX + "OVERRIDEEXISTS";

	// 上次选中的代码生成器索引
	private final String CODEGENINDEX = SETTINGPREFIX + "CODEGENINDEX";

	private Combo comboCodeGen;

	private Button btnCheckBoxOverrideExistsFile;

	private IStructuredSelection structSelect;

	private CodeGeneratorInfo[] codeGenerators;

	public CodeGenOptionWizardPage(String name,
			IStructuredSelection structSelect)
	{
		super(name);
		setTitle("code generation option");
		this.structSelect = structSelect;
	}

	public void createControl(Composite parent)
	{
		initializeDialogUnits(parent);

		Composite composite = new Composite(parent, SWT.NONE);
		composite.setFont(parent.getFont());
		int nColumns = 3;

		GridLayout layout = new GridLayout();
		layout.numColumns = 3;
		composite.setLayout(layout);

		Label label = new Label(composite, SWT.WRAP);
		label.setText("please select the source folder to store the code");
		GridData gd = new GridData();
		gd.widthHint = convertWidthInCharsToPixels(60);
		gd.horizontalSpan = 3;
		label.setLayoutData(gd);

		createContainerControls(composite, nColumns);
		initContainerPage(getInitialJavaElement(structSelect));

		createOptionControls(composite);

		setControl(composite);
		Dialog.applyDialogFont(composite);
	}

	private void createOptionControls(Composite composite)
	{
		// 得到对话框设置
		IDialogSettings settings = Activator.getDefault().getDialogSettings();

		Label lTargetORM = new Label(composite, SWT.WRAP);
		lTargetORM.setText("Target ORM:");
		GridData gdLTargetORM = new GridData();
		gdLTargetORM.horizontalSpan = 1;
		gdLTargetORM.horizontalAlignment = GridData.FILL;
		lTargetORM.setLayoutData(gdLTargetORM);

		comboCodeGen = new Combo(composite, SWT.READ_ONLY);

		// 取得所有代码生成器
		codeGenerators = CodeGeneratorLoader.loadAll();
		for (int i = 0, n = codeGenerators.length; i < n; i++)
		{
			CodeGeneratorInfo codeGen = codeGenerators[i];
			// 将代码生成器属性对象以代码生成器的索引为key
			// 保存到控件的用户数据区中
			comboCodeGen.setData(Integer.toString(i), codeGen);
			// 添加项
			comboCodeGen.add(codeGen.getName());
		}

		if (settings.get(CODEGENINDEX) == null)
		{
			// 如果“上次选中的代码生成器索引”为空，则选择第一项
			comboCodeGen.select(0);
		} else
		{
			// 如果“上次选中的代码生成器索引”不为空，则选择上次选中的项
			int index = settings.getInt(CODEGENINDEX);
			comboCodeGen.select(index);
		}

		GridData gdComboTargetORM = new GridData();
		gdComboTargetORM.horizontalSpan = 2;
		gdComboTargetORM.horizontalAlignment = GridData.FILL;
		comboCodeGen.setLayoutData(gdComboTargetORM);

		btnCheckBoxOverrideExistsFile = new Button(composite, SWT.CHECK);
		btnCheckBoxOverrideExistsFile.setText("override existing file");
		btnCheckBoxOverrideExistsFile.setSelection(true);
		// 如果“是否覆盖已有文件”不为空，则将“是否覆盖已有文件”
		// 选择框设置为和上次一样的设置
		if (settings.get(OVERRIDEEXISTS) != null)
		{
			boolean overwrite = settings.getBoolean(OVERRIDEEXISTS);
			btnCheckBoxOverrideExistsFile.setSelection(overwrite);
		}
		GridData gdOverrideExists = new GridData();
		gdOverrideExists.horizontalSpan = 3;
		gdOverrideExists.horizontalAlignment = GridData.FILL;
		btnCheckBoxOverrideExistsFile.setLayoutData(gdOverrideExists);

	}

	protected IStatus containerChanged()
	{
		IStatus status = super.containerChanged();
		updateStatus(status);
		return status;
	}

	/**
	 * 得到用户选择的代码生成器的实例
	 * 
	 * @return
	 */
	public IEntityModelCodeGenerator getCodeGenerator()
	{
		CodeGeneratorInfo gen = codeGenerators[comboCodeGen.getSelectionIndex()];
		String className = gen.getClassName();
		try
		{
			Class clz = Class.forName(className);
			return (IEntityModelCodeGenerator) clz.newInstance();
		} catch (ClassNotFoundException e)
		{
			Activator.logException(e);
		} catch (InstantiationException e)
		{
			Activator.logException(e);
		} catch (IllegalAccessException e)
		{
			Activator.logException(e);
		}
		return null;
	}

	public boolean isOverrideExistsFile()
	{
		return btnCheckBoxOverrideExistsFile.getSelection();
	}

	/**
	 * 保存用户本次的设置
	 */
	public void saveConfig()
	{
		IDialogSettings settings = Activator.getDefault().getDialogSettings();
		settings.put(OVERRIDEEXISTS, isOverrideExistsFile());
		settings.put(CODEGENINDEX, comboCodeGen.getSelectionIndex());
	}

}