/*******************************************************************************
 * Copyright (c) 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.tools.internal;

import java.io.*;
import java.lang.reflect.*;

import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;

public class JNIGeneratorAppUI {

	Display display;
	Shell shell;
	
	Combo mainClassCb, outputDirCb;
	Table classesLt, membersLt, paramsLt;
	FileDialog fileDialog;
	
	TableEditor paramTextEditor, paramListEditor, memberTextEditor, memberListEditor, classTextEditor, classListEditor;
	Text paramEditorTx, memberEditorTx, classEditorTx;
	List paramEditorLt, memberEditorLt, classEditorLt;
	
	JNIGeneratorApp app;

	static final int CLASS_NAME_COLUMN = 0;
	static final int CLASS_EXCLUDE_COLUMN = 1;
	
	static final int FIELD_NAME_COLUMN = 0;
	static final int FIELD_CAST_COLUMN = 1;
	static final int FIELD_ACCESSOR_COLUMN = 2;
	static final int FIELD_FLAGS_COLUMN = 3;
	static final int FIELD_EXCLUDE_COLUMN = 4;
	
	static final int METHOD_NAME_COLUMN = 0;
	static final int METHOD_FLAGS_COLUMN = 1;
	static final int METHOD_EXCLUDE_COLUMN = 2;
	
	static final int PARAM_INDEX_COLUMN = 0;
	static final int PARAM_TYPE_COLUMN = 1;
	static final int PARAM_CAST_COLUMN = 2;
	static final int PARAM_FLAGS_COLUMN = 3;
	
public JNIGeneratorAppUI() {
	this (new JNIGeneratorApp());
}

public JNIGeneratorAppUI(JNIGeneratorApp app) {
	this.app = app;
}

void cleanup() {
}

void generateStructsHeader () {
	StructsGenerator gen = new StructsGenerator();
	gen.setMetaData(app.getMetaData());
	Class[] classes = getSelectedClasses();
	gen.generateHeaderFile(classes);
}

void generateStructs () {
	StructsGenerator gen = new StructsGenerator();
	gen.setMetaData(app.getMetaData());
	Class[] classes = getSelectedClasses();
	gen.generateSourceFile(classes);
}

void generateSizeof () {
	SizeofGenerator gen = new SizeofGenerator();
	gen.setMetaData(app.getMetaData());
	gen.generate(getSelectedClasses());
}

void generateMetaData () {
	MetaDataGenerator gen = new MetaDataGenerator();
	gen.setMetaData(app.getMetaData());
	Method[] methods = getSelectedMethods();
	if (methods.length != 0) gen.generate(methods);
	else gen.generate(getSelectedClasses());
}

void generateNatives () {
	NativesGenerator gen = new NativesGenerator();
	gen.setMetaData(app.getMetaData());
	Method[] methods = getSelectedMethods();
	if (methods.length != 0) gen.generate(methods);
	else gen.generate(getSelectedClasses());
}

void generateConstants () {
	ConstantsGenerator gen = new ConstantsGenerator();
	gen.setMetaData(app.getMetaData());
	Field[] fields = getSelectedFields();
	if (fields.length != 0) gen.generate(fields);
	else gen.generate(getSelectedClasses());
}

Class[] getSelectedClasses() {
	TableItem[] items = classesLt.getSelection();
	Class[] classes = new Class[items.length];
	for (int i = 0; i < items.length; i++) {
		TableItem item = items[i];
		classes[i] = ((ClassData)item.getData()).getClazz();
	}
	return classes;
}

Method[] getSelectedMethods() {
	TableItem[] selection = membersLt.getSelection();
	Method[] methods = new Method[selection.length];
	int count = 0;
	for (int i = 0; i < selection.length; i++) {
		TableItem item = selection [i];
		Object data = item.getData();
		if (data instanceof MethodData) {
			Method method = ((MethodData)data).getMethod();
			methods[count++] = method;
		}
	}
	if (count != methods.length) {
		Method[] result = new Method[count];
		System.arraycopy(methods, 0, result, 0, count);
		methods = result;
	}
	return methods;
}

Field[] getSelectedFields() {
	TableItem[] selection = membersLt.getSelection();
	Field[] fields = new Field[selection.length];
	int count = 0;
	for (int i = 0; i < selection.length; i++) {
		TableItem item = selection [i];
		Object data = item.getData();
		if (data instanceof FieldData) {
			Field field = ((FieldData)data).getField();
			fields[count++] = field;
		}
	}
	if (count != fields.length) {
		Field[] result = new Field[count];
		System.arraycopy(fields, 0, result, 0, count);
		fields = result;
	}
	return fields;
}

public void open () {
	display = new Display();
	shell = new Shell(display);
	shell.setText("JNI Generator");

	GridData data;
	GridLayout shellLayout = new GridLayout();
	shellLayout.numColumns = 2;
	shell.setLayout(shellLayout);
	
	Composite panel = new Composite(shell, SWT.NONE);
	data = new GridData(GridData.FILL_BOTH);
	panel.setLayoutData(data);
	
	GridLayout panelLayout = new GridLayout();
	panelLayout.numColumns = 1;
	panel.setLayout(panelLayout);
	
	Listener updateMainClassListener =  new Listener() {
		public void handleEvent(Event e) {
			updateMainClass();
			if (!updateOutputDir()) return;
			updateClasses();
			updateMembers();
			updateParameters();
		}
	};	
	createMainClassPanel(panel, updateMainClassListener);
	createOutputDirPanel(panel, updateMainClassListener);
	createClassesPanel(panel);
	createMembersPanel(panel);
	createParametersPanel(panel);
	createActionButtons(shell);

	Point preferredSize = shell.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	shell.setSize(shell.getSize().x, preferredSize.y);
	((GridData)classesLt.getLayoutData()).heightHint = -1;
	((GridData)membersLt.getLayoutData()).heightHint = -1;
	((GridData)paramsLt.getLayoutData()).heightHint = -1;
	
	updateMainClass();
	updateClasses();
	updateMembers();
	updateParameters();
}

void createMainClassPanel(Composite panel, Listener updateListener) {
	Label mainClassLb = new Label(panel, SWT.NONE);
	mainClassLb.setText("Main Class:");

	GridData data;
	mainClassCb = new Combo(panel, SWT.DROP_DOWN);
	String mainClass = app.getMainClass();
	mainClassCb.setText(mainClass == null ? "" : mainClass);
	data = new GridData(GridData.FILL_HORIZONTAL);
	mainClassCb.setLayoutData(data);
	mainClassCb.addListener(SWT.Selection, updateListener);
	mainClassCb.addListener(SWT.DefaultSelection, updateListener);
}

void createOutputDirPanel(Composite panel, Listener updateListener) {
	Label outputDirLb = new Label(panel, SWT.NONE);
	outputDirLb.setText("Output Dir:");
	
	GridData data;
	outputDirCb = new Combo(panel, SWT.DROP_DOWN);
	String outputDir = app.getOutputDir();
	outputDirCb.setText(outputDir == null ? "" : outputDir);
	data = new GridData(GridData.FILL_HORIZONTAL);
	outputDirCb.setLayoutData(data);
	outputDirCb.addListener(SWT.Selection, updateListener);
	outputDirCb.addListener(SWT.DefaultSelection, updateListener);
}

void createClassesPanel(Composite panel) {
	Label classesLb = new Label(panel, SWT.NONE);
	classesLb.setText("Classes:");

	GridData data;
	classesLt = new Table(panel, SWT.CHECK | SWT.MULTI | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION);
	data = new GridData(GridData.FILL_BOTH);
	data.heightHint = classesLt.getItemHeight() * 6;
	classesLt.setLayoutData(data);
	classesLt.setHeaderVisible(true);
	classesLt.addListener(SWT.Selection, new Listener() {
		public void handleEvent(Event e) {
			if (e.detail == SWT.CHECK) {
				updateGenerate((TableItem)e.item);
			} else {
				updateMembers();
				updateParameters();
			}
		}
	});
	TableColumn column;
	column = new TableColumn(classesLt, SWT.NONE, CLASS_NAME_COLUMN);
	column.setText("Class");
	/*
	column = new TableColumn(classesLt, SWT.NONE, CLASS_EXCLUDE_COLUMN);
	column.setText("Exclude");
	*/
}

void createMembersPanel(Composite panel) {
	Label membersLb = new Label(panel, SWT.NONE);
	membersLb.setText("Members:");

	GridData data;
	membersLt = new Table(panel, SWT.CHECK | SWT.MULTI | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION);
	data = new GridData(GridData.FILL_BOTH);
	data.heightHint = membersLt.getItemHeight() * 6;
	membersLt.setLayoutData(data);
	membersLt.addListener(SWT.Selection, new Listener() {
		public void handleEvent(Event e) {
			if (e.detail == SWT.CHECK) {
				updateGenerate((TableItem)e.item);
			} else {
				updateParameters();
			}
		}
	});
	
	memberTextEditor = new TableEditor(membersLt);
	memberTextEditor.grabHorizontal = true;
	memberEditorTx = new Text(membersLt, SWT.SINGLE);
	memberTextEditor.setEditor(memberEditorTx);
	Listener memberTextListener = new Listener() {
		public void handleEvent(Event e) {
			memberEditorTx.setVisible(false);
			TableItem item = memberTextEditor.getItem();
			if (item == null) return;
			int column = memberTextEditor.getColumn();
			ItemData memberData = (ItemData)item.getData();
			String text = memberEditorTx.getText();
			MetaData metaData = app.getMetaData();
			if (memberData instanceof FieldData) {
				FieldData fieldData = (FieldData)memberData;
				switch (column) {
					case FIELD_CAST_COLUMN: {
						fieldData.setCast(text);
						item.setText(column, fieldData.getCast());
						break;
					}
					case FIELD_ACCESSOR_COLUMN: {
						fieldData.setAccessor(text);
						item.setText(column, fieldData.getAccessor());
						break;
					}
					case FIELD_EXCLUDE_COLUMN: {
						fieldData.setExclude(text);
						item.setText(column, fieldData.getExclude());
						break;
					}
				}
				metaData.setMetaData(fieldData.getField(), fieldData);
				membersLt.getColumn(column).pack();
			} else if (memberData instanceof MethodData) {
				MethodData methodData = (MethodData)memberData;
				switch (column) {
					case METHOD_EXCLUDE_COLUMN: {
						methodData.setExclude(text);
						item.setText(column, methodData.getExclude());
						break;
					}
				}
				metaData.setMetaData(methodData.getMethod(), methodData);
				membersLt.getColumn(column).pack();
			}
		}
	};
	memberEditorTx.addListener(SWT.DefaultSelection, memberTextListener);
	memberEditorTx.addListener(SWT.FocusOut, memberTextListener);
	
	memberListEditor = new TableEditor(membersLt);
	memberEditorLt = new List(membersLt, SWT.MULTI | SWT.BORDER);
	memberListEditor.setEditor(memberEditorLt);
	Listener memberListListener = new Listener() {
		public void handleEvent(Event e) {
			memberEditorLt.setVisible(false);
			TableItem item = memberListEditor.getItem();
			if (item == null) return;
			int column = memberListEditor.getColumn();
			ItemData data = (ItemData)item.getData();
			String[] flags = memberEditorLt.getSelection();
			data.setFlags(flags);
			item.setText(column, getFlagsString(data.getFlags()));
			item.setChecked(data.isGenerate());
			MetaData metaData = app.getMetaData();
			if (data instanceof FieldData) {
				FieldData fieldData = (FieldData)data;
				metaData.setMetaData(fieldData.getField(), fieldData);
				membersLt.getColumn(column).pack();
			} else if (data instanceof MethodData) {
				MethodData methodData = (MethodData)data;
				metaData.setMetaData(methodData.getMethod(), methodData);
				membersLt.getColumn(column).pack();
			}
		}
	};
	memberEditorLt.addListener(SWT.DefaultSelection, memberListListener);
	memberEditorLt.addListener(SWT.FocusOut, memberListListener);
	
	membersLt.addListener(SWT.MouseDown, new Listener() {
		public void handleEvent(Event e) {
			if (e.button != 1) return;
			Point pt = new Point(e.x, e.y);
			TableItem item = membersLt.getItem(pt);
			if (item == null) return;
			int column = -1;
			for (int i = 0; i < membersLt.getColumnCount(); i++) {
				if (item.getBounds(i).contains(pt)) {
					column = i;
					break;
				}				
			}
			if (column == -1) return;
			ItemData itemData = (ItemData)item.getData();
			if (itemData instanceof FieldData) {
				FieldData data = (FieldData)itemData;
				if (column == FIELD_CAST_COLUMN || column == FIELD_ACCESSOR_COLUMN || column == FIELD_EXCLUDE_COLUMN) {
					memberTextEditor.setColumn(column);
					memberTextEditor.setItem(item);
					String text = "";
					switch (column) {
						case FIELD_CAST_COLUMN: text = data.getCast(); break;
						case FIELD_ACCESSOR_COLUMN: text = data.getAccessor(); break;
						case FIELD_EXCLUDE_COLUMN: text = data.getExclude(); break;
					}
					memberEditorTx.setText(text);
					memberEditorTx.selectAll();
					memberEditorTx.setVisible(true);
					memberEditorTx.setFocus();
				} else if (column == FIELD_FLAGS_COLUMN) {
					if (membersLt.getClientArea().contains(pt.x, pt.y + memberEditorLt.getSize().y)) {
						memberListEditor.verticalAlignment = SWT.TOP;
					} else {
						memberListEditor.verticalAlignment = SWT.BOTTOM;
					}
					memberListEditor.setColumn(column);
					memberListEditor.setItem(item);
					memberEditorLt.setItems(FieldData.getAllFlags());
					Point size = memberEditorLt.computeSize(SWT.DEFAULT, SWT.DEFAULT);
					memberListEditor.minimumWidth = size.x;
					memberListEditor.minimumHeight = size.y;
					memberEditorLt.setSelection(data.getFlags());
					memberEditorLt.setVisible(true);
					memberEditorLt.setFocus();
				}
			} else if (itemData instanceof MethodData) {
				MethodData data = (MethodData)itemData;
				if (column == METHOD_EXCLUDE_COLUMN) {
					memberTextEditor.setColumn(column);
					memberTextEditor.setItem(item);
					memberEditorTx.setText(data.getExclude());
					memberEditorTx.selectAll();
					memberEditorTx.setVisible(true);
					memberEditorTx.setFocus();
				} else if (column == METHOD_FLAGS_COLUMN) {
					if (membersLt.getClientArea().contains(pt.x, pt.y + memberEditorLt.getSize().y)) {
						memberListEditor.verticalAlignment = SWT.TOP;
					} else {
						memberListEditor.verticalAlignment = SWT.BOTTOM;
					}
					memberListEditor.setColumn(column);
					memberListEditor.setItem(item);
					memberEditorLt.setItems(MethodData.getAllFlags());
					Point size = memberEditorLt.computeSize(SWT.DEFAULT, SWT.DEFAULT);
					memberListEditor.minimumWidth = size.x;
					memberListEditor.minimumHeight = size.y;
					memberEditorLt.setSelection(data.getFlags());
					memberEditorLt.setVisible(true);
					memberEditorLt.setFocus();
				}
			}
		}
	});
}

void createParametersPanel(Composite panel) {
	Label paramsLb = new Label(panel, SWT.NONE);
	paramsLb.setText("Parameters:");
	
	GridData data;
	paramsLt = new Table(panel, SWT.MULTI | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION);
	data = new GridData(GridData.FILL_BOTH);
	int itemHeight = paramsLt.getItemHeight();
	data.heightHint = itemHeight * 6;
	paramsLt.setLayoutData(data);
	paramsLt.addListener(SWT.Selection, new Listener() {
		public void handleEvent(Event e) {
			if (e.detail == SWT.CHECK) {
				updateGenerate((TableItem)e.item);
			}
		}
	});

	TableColumn column;
	column = new TableColumn(paramsLt, SWT.NONE, PARAM_INDEX_COLUMN);
	column = new TableColumn(paramsLt, SWT.NONE, PARAM_TYPE_COLUMN);
	column.setText("Type");
	column = new TableColumn(paramsLt, SWT.NONE, PARAM_CAST_COLUMN);
	column.setText("Cast");
	column = new TableColumn(paramsLt, SWT.NONE, PARAM_FLAGS_COLUMN);
	column.setText("Flags");
	
	paramTextEditor = new TableEditor(paramsLt);
	paramTextEditor.grabHorizontal = true;
	paramEditorTx = new Text(paramsLt, SWT.SINGLE);
	paramTextEditor.setEditor(paramEditorTx);
	Listener paramTextListener = new Listener() {
		public void handleEvent(Event e) {
			paramEditorTx.setVisible(false);
			TableItem item = paramTextEditor.getItem();
			if (item == null) return;
			int column = paramTextEditor.getColumn();
			ParameterData paramData = (ParameterData)item.getData();
			if (column == PARAM_CAST_COLUMN) {
				String text = paramEditorTx.getText();
				paramData.setCast(text);
				item.setText(column, paramData.getCast());
				MetaData metaData = app.getMetaData();
				metaData.setMetaData(paramData.getMethod(), paramData.getParameter(), paramData);
				paramsLt.getColumn(column).pack();
			}
		}
	};
	paramEditorTx.addListener(SWT.DefaultSelection, paramTextListener);
	paramEditorTx.addListener(SWT.FocusOut, paramTextListener); 
	
	paramListEditor = new TableEditor(paramsLt);
	paramEditorLt = new List(paramsLt, SWT.MULTI | SWT.BORDER);
	paramEditorLt.setItems(ParameterData.getAllFlags());
	Point size = paramEditorLt.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	paramListEditor.minimumWidth = size.x;
	paramListEditor.minimumHeight = size.y;
	paramListEditor.setEditor(paramEditorLt);
	Listener paramListListener = new Listener() {
		public void handleEvent(Event e) {
			paramEditorLt.setVisible(false);
			TableItem item = paramListEditor.getItem();
			if (item == null) return;
			int column = paramListEditor.getColumn();
			ParameterData paramData = (ParameterData)item.getData();
			if (column == PARAM_FLAGS_COLUMN) {
				String[] flags = paramEditorLt.getSelection();
				paramData.setFlags(flags);
				item.setText(column, getFlagsString(paramData.getFlags()));
				MetaData metaData = app.getMetaData();
				metaData.setMetaData(paramData.getMethod(), paramData.getParameter(), paramData);
				paramsLt.getColumn(column).pack();
			}
		}
	};
	paramEditorLt.addListener(SWT.DefaultSelection, paramListListener);
	paramEditorLt.addListener(SWT.FocusOut, paramListListener);

	paramsLt.addListener(SWT.MouseDown, new Listener() {
		public void handleEvent(Event e) {
			if (e.button != 1) return;
			Point pt = new Point(e.x, e.y);
			TableItem item = paramsLt.getItem(pt);
			if (item == null) return;
			int column = -1;
			for (int i = 0; i < paramsLt.getColumnCount(); i++) {
				if (item.getBounds(i).contains(pt)) {
					column = i;
					break;
				}				
			}
			if (column == -1) return;
			ParameterData data = (ParameterData)item.getData();
			if (column == PARAM_CAST_COLUMN) {
				paramTextEditor.setColumn(column);
				paramTextEditor.setItem(item);
				paramEditorTx.setText(data.getCast());
				paramEditorTx.selectAll();
				paramEditorTx.setVisible(true);
				paramEditorTx.setFocus();
			} else if (column == PARAM_FLAGS_COLUMN) {
				if (paramsLt.getClientArea().contains(pt.x, pt.y + paramEditorLt.getSize().y)) {
					paramListEditor.verticalAlignment = SWT.TOP;
				} else {
					paramListEditor.verticalAlignment = SWT.BOTTOM;
				}
				paramListEditor.setColumn(column);
				paramListEditor.setItem(item);
				paramEditorLt.setSelection(data.getFlags());
				paramEditorLt.setVisible(true);
				paramEditorLt.setFocus();
			}
		}
	});
}

Button createActionButton(Composite parent, String text, Listener listener) {
	Button action = new Button(parent, SWT.PUSH);
	action.setText(text);
	GridData data = new GridData(GridData.FILL_HORIZONTAL);
	action.setLayoutData(data);
	action.addListener(SWT.Selection, listener);
	return action;
}

void createActionButtons(Composite parent) {		
	Composite actionsPanel = new Composite(parent, SWT.NONE);

	GridData data = new GridData(GridData.FILL_VERTICAL);
	actionsPanel.setLayoutData(data);
		
	GridLayout actionsLayout = new GridLayout();
	actionsLayout.numColumns = 1;
	actionsPanel.setLayout(actionsLayout);
	
	createActionButton(actionsPanel, "Generate All", new Listener() {
		public void handleEvent(Event e) {
			if (!updateOutputDir()) return;
			Cursor cursor = new Cursor(shell.getDisplay(), SWT.CURSOR_WAIT);
			shell.setCursor(cursor);
			app.generate();
			shell.setCursor(null);
			cursor.dispose();
			
		}
	});
	
	Label separator = new Label(actionsPanel, SWT.SEPARATOR | SWT.HORIZONTAL);
	data = new GridData(GridData.FILL_HORIZONTAL);
	separator.setLayoutData(data);
	separator = new Label(actionsPanel, SWT.SEPARATOR | SWT.HORIZONTAL);
	data = new GridData(GridData.FILL_HORIZONTAL);
	separator.setLayoutData(data);
	
	createActionButton(actionsPanel, "Generate Structs Header", new Listener() {
		public void handleEvent(Event e) {
			generateStructsHeader();
		}
	});
	createActionButton(actionsPanel, "Generate Structs", new Listener() {
		public void handleEvent(Event e) {
			generateStructs();
		}
	});
	createActionButton(actionsPanel, "Generate Natives", new Listener() {
		public void handleEvent(Event e) {
			generateNatives();
		}
	});
	createActionButton(actionsPanel, "Generate Constants", new Listener() {
		public void handleEvent(Event e) {
			generateConstants();
		}
	});	
	createActionButton(actionsPanel, "Generate Sizeof", new Listener() {
		public void handleEvent(Event e) {
			generateSizeof();
		}
	});
	createActionButton(actionsPanel, "Generate Meta Data", new Listener() {
		public void handleEvent(Event e) {
			generateMetaData();
		}
	});
}

public void run() {
	shell.open();
	while (!shell.isDisposed()) {
		if (!display.readAndDispatch()) display.sleep ();
	}
	cleanup();
}

String getPackageString(String className) {
	int dot = app.getMainClass().lastIndexOf('.');
	if (dot == -1) return "";
	return app.getMainClass().substring(0, dot);
}

String getClassString(Class clazz) {
	String name = JNIGenerator.getTypeSignature3(clazz);
	int index = name.lastIndexOf('.');
	if (index == -1) return name;
	return name.substring(index + 1, name.length());
}

String getFlagsString(String[] flags) {
	if (flags.length == 0) return "";
	StringBuffer buffer = new StringBuffer();
	for (int j = 0; j < flags.length; j++) {
		String flag = flags[j];
		if (buffer.length() != 0) buffer.append(", ");
		buffer.append(flag);
	}
	return buffer.toString();
}

String getMethodString(Method method) {
	String pkgName = getPackageString(method.getDeclaringClass().getName());
	StringBuffer buffer = new StringBuffer();
	buffer.append(method.getName());
	buffer.append("(");
	Class[] params = method.getParameterTypes();
	for (int i = 0; i < params.length; i++) {
		Class param = params[i];
		if (i != 0) buffer.append(",");
		String string = JNIGenerator.getTypeSignature3(param);
		if (string.startsWith(pkgName)) string = string.substring(pkgName.length() + 1);
		buffer.append(string);
	}
	buffer.append(")");
	return buffer.toString();
}

String getFieldString(Field field) {
	return field.getName();
}

void updateClasses() {
	classesLt.removeAll();
	MetaData metaData = app.getMetaData();
	Class[] classes = app.getClasses();
	for (int i = 0; i < classes.length; i++) {
		Class clazz = classes[i];
		ClassData classData = metaData.getMetaData(clazz);
		TableItem item = new TableItem(classesLt, SWT.NONE);
		item.setData(classData);
		item.setText(CLASS_NAME_COLUMN, getClassString(clazz));
		item.setChecked(classData.isGenerate());
	}
	TableColumn[] columns = classesLt.getColumns();
	for (int i = 0; i < columns.length; i++) {
		TableColumn column = columns[i];
		column.pack();
	}
}

void updateMembers() {
	membersLt.removeAll();
	MetaData metaData = app.getMetaData();
	membersLt.setHeaderVisible(false);
	TableColumn[] columns = membersLt.getColumns();
	for (int i = 0; i < columns.length; i++) {
		TableColumn column = columns[i];
		column.dispose();
	}
	int[] indices = classesLt.getSelectionIndices();
	if (indices.length != 1) return;
	TableItem classItem = classesLt.getItem(indices[0]);
	ClassData classData = (ClassData)classItem.getData();
	Class clazz = classData.getClazz();
	boolean hasNatives = false;
	Method[] methods = clazz.getDeclaredMethods();
	for (int i = 0; i < methods.length; i++) {
		Method method = methods[i];
		int mods = method.getModifiers();
		if (hasNatives =((mods & Modifier.NATIVE) != 0)) break;
	}
	membersLt.setRedraw(false);
	if (hasNatives) {
		TableColumn column;
		column = new TableColumn(membersLt, SWT.NONE, METHOD_NAME_COLUMN);
		column.setText("Method");
		column = new TableColumn(membersLt, SWT.NONE, METHOD_FLAGS_COLUMN);
		column.setText("Flags");
		/*
		column = new TableColumn(membersLt, SWT.NONE, METHOD_EXCLUDE_COLUMN);
		column.setText("Exclude");
		*/
		JNIGenerator.sort(methods);
		for (int i = 0; i < methods.length; i++) {
			Method method = methods[i];
			if ((method.getModifiers() & Modifier.NATIVE) == 0) continue;
			MethodData methodData = metaData.getMetaData(method);
			TableItem item = new TableItem(membersLt, SWT.NONE);
			item.setData(methodData);
			item.setText(METHOD_NAME_COLUMN, getMethodString(method));
			item.setChecked(methodData.isGenerate());
			item.setText(METHOD_FLAGS_COLUMN, getFlagsString(methodData.getFlags()));
			/*
			item.setText(METHOD_EXCLUDE_COLUMN, methodData.getExclude());
			*/
		}
	} else {
		TableColumn column;
		column = new TableColumn(membersLt, SWT.NONE, FIELD_NAME_COLUMN);
		column.setText("Field");
		column = new TableColumn(membersLt, SWT.NONE, FIELD_CAST_COLUMN);
		column.setText("Cast");
		column = new TableColumn(membersLt, SWT.NONE, FIELD_ACCESSOR_COLUMN);
		column.setText("Accessor");
		column = new TableColumn(membersLt, SWT.NONE, FIELD_FLAGS_COLUMN);
		column.setText("Flags");
		/*
		column = new TableColumn(membersLt, SWT.NONE, FIELD_EXCLUDE_COLUMN);
		column.setText("Exclude");
		*/
		Field[] fields = clazz.getDeclaredFields();	
		for (int i = 0; i < fields.length; i++) {
			Field field = fields[i];
			int mods = field.getModifiers(); 
			if (((mods & Modifier.PUBLIC) == 0) ||
				((mods & Modifier.FINAL) != 0) ||
				((mods & Modifier.STATIC) != 0)) continue;
			FieldData fieldData = metaData.getMetaData(field);
			TableItem item = new TableItem(membersLt, SWT.NONE);
			item.setData(fieldData);
			item.setText(FIELD_NAME_COLUMN, getFieldString(field));
			item.setChecked(fieldData.isGenerate());
			item.setText(FIELD_CAST_COLUMN, fieldData.getCast());
			item.setText(FIELD_ACCESSOR_COLUMN, fieldData.getAccessor());
			item.setText(FIELD_FLAGS_COLUMN, getFlagsString(fieldData.getFlags()));
			/*
			item.setText(FIELD_EXCLUDE_COLUMN, fieldData.getExclude());
			*/
		}
	}
	columns = membersLt.getColumns();
	for (int i = 0; i < columns.length; i++) {
		TableColumn column = columns[i];
		column.pack();
	}
	membersLt.setHeaderVisible(true);
	membersLt.setRedraw(true);
}

void updateParameters() {
	paramsLt.removeAll();
	MetaData metaData = app.getMetaData();
	int[] indices = membersLt.getSelectionIndices();
	if (indices.length != 1) {
		paramsLt.setHeaderVisible(false);
		return;
	}
	paramsLt.setRedraw(false);
	TableItem memberItem = membersLt.getItem(indices[0]);
	Object data = memberItem.getData();
	if (!(data instanceof MethodData)) return;
	MethodData methodData = (MethodData)memberItem.getData();
	Method method = methodData.getMethod();
	Class[] params = method.getParameterTypes();
	for (int i = 0; i < params.length; i++) {
		Class param = params[i];
		ParameterData paramData = metaData.getMetaData(method, i);
		TableItem item = new TableItem(paramsLt, SWT.NONE);
		item.setData(paramData);
		item.setText(PARAM_INDEX_COLUMN, String.valueOf(i));
		item.setText(PARAM_TYPE_COLUMN, getClassString(param));
		item.setText(PARAM_CAST_COLUMN, paramData.getCast());
		item.setText(PARAM_FLAGS_COLUMN, getFlagsString(paramData.getFlags()));
	}
	TableColumn[] columns = paramsLt.getColumns();
	for (int i = 0; i < columns.length; i++) {
		TableColumn column = columns[i];
		column.pack();
	}
	paramsLt.setRedraw(true);
	paramsLt.setHeaderVisible(true);
}

void updateGenerate(TableItem item) {
	MetaData metaData = app.getMetaData();
	ItemData itemData = (ItemData)item.getData();
	itemData.setGenerate(item.getChecked());
	if (itemData instanceof ClassData) {
		ClassData data = (ClassData)itemData;
		metaData.setMetaData(data.getClazz(), data);
	} else if (itemData instanceof FieldData) {
		FieldData data = (FieldData)itemData;
		item.setText(FIELD_FLAGS_COLUMN, getFlagsString(data.getFlags()));
		metaData.setMetaData(data.getField(), data);
	} else if (itemData instanceof MethodData) {
		MethodData data = (MethodData)itemData;
		item.setText(METHOD_FLAGS_COLUMN, getFlagsString(data.getFlags()));
		metaData.setMetaData(data.getMethod(), data);
	} else if (itemData instanceof ParameterData) {
		ParameterData data = (ParameterData)itemData;
		item.setText(PARAM_FLAGS_COLUMN, getFlagsString(data.getFlags()));
		metaData.setMetaData(data.getMethod(), data.getParameter(), data);
	}
}

boolean updateOutputDir() {
	String outputDirStr = outputDirCb.getText();
	File file = new File(outputDirStr);
	if (!file.exists()) {
		MessageBox dialog = new MessageBox(shell, SWT.OK | SWT.ICON_ERROR);
		dialog.setMessage("Output directory does not exist.");
		dialog.open();
		return false;
	}
	if (!file.isDirectory()) {
		MessageBox dialog = new MessageBox(shell, SWT.OK | SWT.ICON_ERROR);
		dialog.setMessage("Output directory is not a directory.");
		dialog.open();
		return false;
	}
	if (outputDirStr.length() > 0) {
		if (!outputDirStr.equals(app.getOutputDir())) {
			app.setOutputDir(outputDirStr);
		}
		if (outputDirCb.indexOf(outputDirStr) == -1) {
			outputDirCb.add(outputDirStr);
		}
	}
	return true;
}

void updateMainClass() {
	String mainClassStr = mainClassCb.getText();
	if (mainClassStr.length() > 0) {
		if (!mainClassStr.equals(app.getMainClass())) {
			app.setMainClass(mainClassStr);
		}
		if (mainClassCb.indexOf(mainClassStr) == -1) {
			mainClassCb.add(mainClassStr);
		}
	}
}

public static void main(String[] args) {
	JNIGeneratorApp gen = new JNIGeneratorApp ();
	if (args.length > 0) {
		gen.setMainClass(args[0]);
		if (args.length > 1) gen.setOutputDir(args[1]);
	} else {
		gen.setMainClass(JNIGeneratorApp.getDefaultMainClass());
		gen.setOutputDir(JNIGeneratorApp.getDefaultOutputDir());
	}
	JNIGeneratorAppUI ui = new JNIGeneratorAppUI(gen);
	ui.open();
	ui.run();
}

}