OptionSpecificationImpl.java

package org.caudexorigo.cli;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.logging.Logger;

class OptionSpecificationImpl extends ArgumentSpecificationImpl implements OptionSpecification
{
	private static final Logger g_logger = Logger.getLogger(OptionSpecificationImpl.class.getName());
	private final List<String> m_allNames = new ArrayList<String>();
	private final List<String> m_shortNames;
	private final String m_longName;
	private final String m_description;
	private final String m_pattern;
	private final List<String> m_default;
	private final boolean m_helpRequest;

	public OptionSpecificationImpl(final Method method, final Class<?> klass)
	{
		super(method, klass);

		final Option optionAnnotation = method.getAnnotation(Option.class);

		final String[] shortNameSpecification = optionAnnotation.shortName();
		m_shortNames = new ArrayList<String>();
		for (int i = 0; i < shortNameSpecification.length; i++)
		{
			final String shortName = shortNameSpecification[i].trim();
			if (shortName.length() > 0)
			{
				m_shortNames.add(shortNameSpecification[i].substring(0, 1));
			}
		}
		m_allNames.addAll(m_shortNames);

		final String longNameSpecification = optionAnnotation.longName().trim();
		m_longName = nullOrBlank(longNameSpecification) ? getName() : longNameSpecification;
		m_allNames.add(m_longName);

		m_description = optionAnnotation.description().trim();

		m_pattern = optionAnnotation.pattern();
		m_default = Arrays.asList(optionAnnotation.defaultValue());

		m_helpRequest = optionAnnotation.helpRequest();

		g_logger.finer(String.format("Create option specification name:%s, shortName:%s, type:%s (multiValued:%b, hasValue:%b, isOptional:%b, defaultValue:%s)) ", getName(), getShortNames(), getType(), isMultiValued(), hasValue(), isOptional(), getDefaultValue()));
	}

	/**
	 * @inheritdoc
	 */
	public List<String> getShortNames()
	{
		return m_shortNames;
	}

	/**
	 * @inheritdoc
	 */
	public String getLongName()
	{
		return m_longName;
	}

	public boolean hasCustomPattern()
	{
		return !m_pattern.equals(".*");
	}

	public boolean patternMatches(final String value)
	{
		return value.matches(m_pattern);
	}

	/**
	 * @inheritdoc
	 */
	public boolean hasShortName()
	{
		return m_shortNames.size() > 0;
	}

	private boolean nullOrBlank(final String string)
	{
		return string == null || string.equals("");
	}

	/**
	 * @inheritdoc
	 */
	public String getDescription()
	{
		return m_description;
	}

	public StringBuilder getSummary(final StringBuilder result)
	{
		if (isOptional())
		{
			result.append("[");
		}

		result.append("--").append(getLongName());

		for (final String shortName : getShortNames())
		{
			result.append(" -").append(shortName);
		}

		if (hasValue())
		{
			if (hasCustomPattern())
			{
				result.append(" /").append(m_pattern).append("/");
			}
			else
			{
				result.append(" value");
			}
			if (isMultiValued())
			{
				result.append("...");
			}
		}

		if (isOptional())
		{
			result.append("]");
		}

		return result;
	}

	@Override
	public String toString()
	{
		final StringBuilder result = new StringBuilder();

		getSummary(result);

		if (!nullOrBlank(getDescription()))
		{
			result.append(" : ").append(getDescription());
		}

		return result.toString();
	}

	public List<String> getAllNames()
	{
		return m_allNames;
	}

	public List<String> getDefaultValue()
	{
		return m_default;
	}

	public boolean hasDefaultValue()
	{
		return m_default.size() > 0;
	}

	public boolean isHelpOption()
	{
		return m_helpRequest;
	}
}