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/**
 * Copyright Terracotta, Inc. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language governing permissions and limitations under the
 * License.
 */
package net.sf.ehcache.search.parser;

import net.sf.ehcache.search.Attribute;
import net.sf.ehcache.search.Query;

public class MAttribute implements ModelElement> {

    /**
     * The name.
     */
    private final String name;

    /**
     * Is this the key.
     */
    private final boolean isKey;

    /**
     * Is this the value.
     */
    private final boolean isValue;

    private final boolean isStar;

    /**
     * The key.
     */
    public static MAttribute KEY = new MAttribute("key", true, false, false);

    /**
     * The value.
     */
    public static MAttribute VALUE = new MAttribute("value", false, true, false);

    /**
     * Star for doing count(*)
     */
    public static MAttribute STAR = new MAttribute("star", false, false, true);

    /**
     * Instantiates a new attribute.
     *
     * @param name the name
     * @param k    the k
     * @param v    the v
     */
    private MAttribute(String name, boolean k, boolean v, boolean isStar) {
        this.name = name;
        isKey = k;
        isValue = v;
        this.isStar = isStar;
    }

    /**
     * Instantiates a new named attribute.
     *
     * @param name the name
     */
    public MAttribute(String name) {
        this(name, false, false, false);
    }

    /**
     * Gets the name.
     *
     * @return the name
     */
    public String getName() {
        return name;
    }

    /**
     * Checks if is key.
     *
     * @return true, if is key
     */
    public boolean isKey() {
        return isKey;
    }

    /**
     * Checks if is value.
     *
     * @return true, if is value
     */
    public boolean isValue() {
        return isValue;
    }

    /**
     * Checks if is star.
     *
     * @return true, if is star
     */
    public boolean isStar() {
        return isStar;
    }

    /**
     * As ehcache attribute string.
     *
     * @return the string
     */
    public String asEhcacheAttributeString() {
    	if (isKey() || isStar()) {
    		return Query.KEY.getAttributeName();
    	} else if (isValue()) {
    		return Query.VALUE.getAttributeName();
    	} else {
    		return name;
    	}    	    	
    }

    /**
     * Get this model attribute as an ehcache attribute.
     *
     * @return the attribute
     */

    @SuppressWarnings("rawtypes")
    public Attribute asEhcacheObject(ClassLoader loader) {
        if (isKey() || isStar()) {
            return Query.KEY;
        } else if (isValue()) {
            return Query.VALUE;
        } else {
            return new Attribute(name);
        }
    }
    
    /*
     * (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        if (isKey()) {
            return name;
        } else if (isValue()) {
            return name;
        } else {
            return "'" + name + "'";
        }
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + (isKey ? 1231 : 1237);
        result = prime * result + (isValue ? 1231 : 1237);
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null) return false;
        if (getClass() != obj.getClass()) return false;
        MAttribute other = (MAttribute)obj;
        if (isKey != other.isKey) return false;
        if (isValue != other.isValue) return false;
        if (name == null) {
            if (other.name != null) return false;
        } else if (!name.equals(other.name)) return false;
        return true;

    }

}