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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/* *******************************************************************
 * Copyright (c) 1999-2001 Xerox Corporation,
 *               2002 Palo Alto Research Center, Incorporated (PARC).
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *     Xerox/PARC     initial implementation
 *     Helen Hawkins  Converted to new interface (bug 148190)
 * ******************************************************************/



package org.aspectj.ajde.ui.internal;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import java.util.StringTokenizer;

import org.aspectj.ajde.Ajde;
import org.aspectj.ajde.ui.UserPreferencesAdapter;
import org.aspectj.bridge.IMessage;
import org.aspectj.bridge.Message;
import org.aspectj.util.LangUtil;

public class UserPreferencesStore implements UserPreferencesAdapter {
	public static final String FILE_NAME = "/.ajbrowser";
	private static final String VALUE_SEP = ";";
	private Properties properties = new Properties();
	private boolean persist = true;

	public UserPreferencesStore() {
		this(true);
	}

	public UserPreferencesStore(boolean loadDefault) {
		persist = loadDefault;
		if (persist) {
			loadProperties(getPropertiesFilePath());
		}
	}

	@Override
	public String getProjectPreference(String name) {
		return properties.getProperty(name);
	}

	@Override
	public List getProjectMultivalPreference(String name) {
		List values = new ArrayList<>();
		String valuesString = properties.getProperty(name);
		if (valuesString != null && !valuesString.trim().equals("")) {
			StringTokenizer st = new StringTokenizer(valuesString, VALUE_SEP);
			while (st.hasMoreTokens()) {
				values.add(st.nextToken());
			}
		}
		return values;
	}

	@Override
	public void setProjectPreference(String name, String value) {
		properties.setProperty(name, value);
		saveProperties();
	}

	@Override
	public void setProjectMultivalPreference(String name, List values) {
		StringBuilder valuesString = new StringBuilder();
		for (Object value : values) {
			valuesString.append((String)value).append(';');
		}
		properties.setProperty(name, valuesString.toString());
		saveProperties();
	}

	public static String getPropertiesFilePath() {
		String path = System.getProperty("user.home");
		if (path == null) {
			path = ".";
		}
		return path + FILE_NAME;
	}

	@Override
	public String getGlobalPreference(String name) {
		return getProjectPreference(name);
	}

	@Override
	public List getGlobalMultivalPreference(String name) {
		return getProjectMultivalPreference(name);
	}

	@Override
	public void setGlobalPreference(String name, String value) {
		setProjectPreference(name, value);
	}

	@Override
	public void setGlobalMultivalPreference(String name, List values) {
		setProjectMultivalPreference(name, values);
	}
	private void loadProperties(String path) {
		if (LangUtil.isEmpty(path)) {
			return;
		}
		File file = new File(path);
		if (!file.canRead()) {
			return;
		}
		FileInputStream in = null;
		try {
			path = getPropertiesFilePath();
			in = new FileInputStream(file);
			properties.load(in);
		} catch (IOException ioe) {
			Message msg = new Message("Error reading properties from " + path,IMessage.ERROR,ioe,null);
			Ajde.getDefault().getMessageHandler().handleMessage(msg);
		} finally {
			if (null != in) {
				try {
					in.close();
				} catch (IOException e) {
					// ignore
				}
			}
		}
	}
	public void saveProperties() {
		if (!persist) return;

		FileOutputStream out = null;
		String path = null;
		try {
			path = getPropertiesFilePath();
			out = new FileOutputStream(path);
			properties.store(out, "AJDE Settings");
		} catch (IOException ioe) {
			Message msg = new Message("Error writing properties to " + path,IMessage.ERROR,ioe,null);
			Ajde.getDefault().getMessageHandler().handleMessage(msg);
		} finally {
			if (null != out) {
				try {
					out.close();
				} catch (IOException e) {
					// ignore
				}
			}
		}
	}
}