com.eyeq.pivot4j.ui.condition.DefaultConditionFactory.java Source code

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Here is the source code for com.eyeq.pivot4j.ui.condition.DefaultConditionFactory.java

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/*
 * ====================================================================
 * This software is subject to the terms of the Common Public License
 * Agreement, available at the following URL:
 *   http://www.opensource.org/licenses/cpl.html .
 * You must accept the terms of that agreement to use this software.
 * ====================================================================
 */
package com.eyeq.pivot4j.ui.condition;

import java.lang.reflect.Constructor;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

import org.apache.commons.lang.NullArgumentException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.eyeq.pivot4j.PivotException;

public class DefaultConditionFactory implements ConditionFactory {

    private Logger logger = LoggerFactory.getLogger(getClass());

    private Map<String, Class<? extends Condition>> types = new TreeMap<String, Class<? extends Condition>>();

    public DefaultConditionFactory() {
        types.put(AndCondition.NAME, AndCondition.class);
        types.put(OrCondition.NAME, OrCondition.class);
        types.put(NotCondition.NAME, NotCondition.class);
        types.put(ExpressionCondition.NAME, ExpressionCondition.class);

        types.put(AxisCondition.NAME, AxisCondition.class);
        types.put(HierarchyCondition.NAME, HierarchyCondition.class);
        types.put(LevelCondition.NAME, LevelCondition.class);
        types.put(MemberCondition.NAME, MemberCondition.class);

        types.put(CellTypeCondition.NAME, CellTypeCondition.class);
        types.put(CellValueCondition.NAME, CellValueCondition.class);
    }

    /**
     * @return the logger
     */
    protected Logger getLogger() {
        return logger;
    }

    /**
     * @see com.eyeq.pivot4j.ui.condition.ConditionFactory#getAvailableConditions()
     */
    @Override
    public List<String> getAvailableConditions() {
        return new LinkedList<String>(types.keySet());
    }

    /**
     * @see com.eyeq.pivot4j.ui.condition.ConditionFactory#createCondition(java.lang.String)
     */
    @Override
    public Condition createCondition(String name) {
        if (name == null) {
            throw new NullArgumentException("name");
        }

        Condition condition = null;

        Class<? extends Condition> type = types.get(name);

        if (type != null) {
            if (logger.isDebugEnabled()) {
                logger.debug("Instantiating a new condition : " + type);
            }

            try {
                Constructor<? extends Condition> constructor = type.getConstructor(ConditionFactory.class);
                condition = constructor.newInstance(this);
            } catch (Exception e) {
                throw new PivotException(e);
            }
        }

        if (condition == null && logger.isWarnEnabled()) {
            logger.warn("Unknown condition name : " + name);
        }

        return condition;
    }
}