Options.java #5

package journal.reader;


import java.io.PrintStream;
import java.util.HashMap;
import java.util.Map;

import journal.exception.UnknownOptionException;

/*
 * Simple helper class to transport all options together in one block
 */

public class Options 
{
	public interface OptionSetter {
		public void set(String key, String value);
	}
	
	private boolean compressed;
	private boolean verbose;
	private boolean caseInsensitive;
	private boolean unicode;
	private PrintStream outputStream = System.out;
	private PrintStream errorStream = System.err;
	
	private Map<String, String> opts = new HashMap<String, String>();
	private Map<String, OptionSetter> setters = new HashMap<String, OptionSetter>();
		
	private String generateKey(String section, String optionName) {
		StringBuffer buf = new StringBuffer(section);
		buf.append('.');
		buf.append(optionName);
		
		return buf.toString();
	}
	
	public void setOptionName(String section, String optionName, String defaultValue, OptionSetter callback) {
		String key = generateKey(section, optionName);
		opts.put(key, defaultValue);
		setters.put(key, callback);
	}

	public void setOption(String section, String optionName, String value) throws UnknownOptionException {
		String key = generateKey(section, optionName);
		
		if( opts.containsKey(key) ) {
			opts.put(key, value);
			setters.get(key).set(key, value);
		}
		else {
			throw new UnknownOptionException(key);
		}
	}
	
	public String getOption(String section, String optionName) throws UnknownOptionException {
		String key = generateKey(section, optionName);
		
		if( opts.containsKey(key) ) {
			return opts.get(key);
		}
		else {
			throw new UnknownOptionException(key);
		}
	}

	public Options() {
		setOptionName("reader", "compressed", Boolean.FALSE.toString(), new OptionSetter() {
			public void set(String key, String value) {
				setCompressed(Boolean.parseBoolean(value));
			}
		});
		setOptionName("reader", "verbose", Boolean.FALSE.toString(), new OptionSetter() {
			public void set(String key, String value) {
				setVerbose(Boolean.parseBoolean(value));
			}
		});
		setOptionName("reader", "caseinsensitive", Boolean.FALSE.toString(), new OptionSetter() {
			public void set(String key, String value) {
				setCaseInsensitive(Boolean.parseBoolean(value));
			}
		});

	}
	
	public boolean isCompressed() {
		return compressed;
	}

	public void setCompressed(boolean compressed) {
		this.compressed = compressed;
	}

	public boolean isVerbose() {
		return verbose;
	}

	public void setVerbose(boolean verbose) {
		this.verbose = verbose;
	}

	public boolean isCaseInsensitive() {
		return caseInsensitive;
	}

	public void setCaseInsensitive(boolean caseInsensitive) {
		this.caseInsensitive = caseInsensitive;
	}

	public boolean isUnicode() {
		return unicode;
	}

	public void setUnicode(boolean unicode) {
		this.unicode = unicode;
	}

	public PrintStream getOutputStream() {
		return outputStream;
	}

	public void setOutputStream(PrintStream outputStream) {
		this.outputStream = outputStream;
	}

	public PrintStream getErrorStream() {
		return errorStream;
	}

	public void setErrorStream(PrintStream errorStream) {
		this.errorStream = errorStream;
	}

}