com.avaje.ebeaninternal.server.deploy.parse.DeployInheritInfo Maven / Gradle / Ivy

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/**
 * Copyright (C) 2006  Robin Bygrave
 * 
 * This file is part of Ebean.
 * 
 * Ebean is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *  
 * Ebean is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with Ebean; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA  
 */
package com.avaje.ebeaninternal.server.deploy.parse;

import java.sql.Types;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import com.avaje.ebeaninternal.server.deploy.InheritInfo;

/**
 * Represents a node in the Inheritance tree.
 * Holds information regarding Super Subclass support. 
 */
public class DeployInheritInfo {

	/**
	 * the default discriminator column according to the JPA 1.0 spec.
	 */
	private static final String JPA_DEFAULT_DISCRIM_COLUMN = "dtype";
	
	private int discriminatorLength;
	
	private int discriminatorType;
	
	private String discriminatorStringValue;
	private Object discriminatorObjectValue;
    
	private String discriminatorColumn;

	private String discriminatorWhere;

	private Class type;

	private Class parent;
    
	private ArrayList children = new ArrayList();
        
    /**
     * Create for a given type.
     */
    public DeployInheritInfo(Class type){
        this.type = type;
    }
    
    /**
     * return the type.
     */
    public Class getType() {
        return type;
    }

    /**
     * Return the type of the root object.
     */
    public Class getParent() {
        return parent;
    }

    /**
     * Set the type of the root object.
     */
    public void setParent(Class parent) {
        this.parent = parent;
    }
    
    /**
     * Return true if this is abstract node.
     */
    public boolean isAbstract() {
        return (discriminatorObjectValue == null);
    }
    
    /**
     * Return true if this is the root node.
     */
    public boolean isRoot(){
    	return parent == null;
    }

    /**
     * Return the child nodes.
     */
    public Iterator children() {
        return children.iterator();
    }
    
    /**
     * Add a child node.
     */
    public void addChild(DeployInheritInfo childInfo){
        children.add(childInfo);
    }

    /**
     * Return the derived where for the discriminator.
     */
    public String getDiscriminatorWhere() {
        return discriminatorWhere;
    }

    /**
     * Set the derived where for the discriminator.
     */
    public void setDiscriminatorWhere(String discriminatorWhere) {
        this.discriminatorWhere = discriminatorWhere;
    }

    /**
     * Return the column name of the discriminator.
     */
    public String getDiscriminatorColumn(InheritInfo parent) {
    	if (discriminatorColumn == null){
    		if (parent == null){
    			discriminatorColumn = JPA_DEFAULT_DISCRIM_COLUMN;
    		} else {
    			discriminatorColumn = parent.getDiscriminatorColumn();
    		}
    	} 
		return discriminatorColumn;
    }

    /**
     * Set the column name of the discriminator.
     */
    public void setDiscriminatorColumn(String discriminatorColumn) {
        this.discriminatorColumn = discriminatorColumn;
    }

    public int getDiscriminatorLength(InheritInfo parent) {
    	if (discriminatorLength == 0){
    		if (parent == null){
    			discriminatorLength = 10;
    		} else {
    			discriminatorLength = parent.getDiscriminatorLength();
    		}
    	} 
		return discriminatorLength;    	
    }
    
    /**
     * Return the sql type of the discriminator value.
     */
    public int getDiscriminatorType(InheritInfo parent) {
    	if (discriminatorType == 0){
    		if (parent == null){
    			discriminatorType = Types.VARCHAR;
    		} else {
    			discriminatorType = parent.getDiscriminatorType();
    		}
    	} 
		return discriminatorType;
	}

    /**
     * Set the sql type of the discriminator.
     */
	public void setDiscriminatorType(int discriminatorType) {
		this.discriminatorType = discriminatorType;
	}
	
	/**
	 * Return the length of the discriminator column.
	 */
	public int getDiscriminatorLength() {
		return discriminatorLength;
	}

	/**
	 * Set the length of the discriminator column.
	 */
	public void setDiscriminatorLength(int discriminatorLength) {
		this.discriminatorLength = discriminatorLength;
	}

	/**
     * Return the discriminator value for this node.
     */
    public Object getDiscriminatorObjectValue() {
        return discriminatorObjectValue;
    }

    public String getDiscriminatorStringValue() {
        return discriminatorStringValue;
    }

    /**
     * Set the discriminator value for this node.
     */
    public void setDiscriminatorValue(String value) {
        if (value != null){
        	value = value.trim();
        	if (value.length() == 0){
        		value = null;
        	} else {
            	discriminatorStringValue = value;
        		// convert the value if desired
	        	if (discriminatorType == Types.INTEGER){
	        		this.discriminatorObjectValue = Integer.valueOf(value.toString());
	        	} else {
	        		this.discriminatorObjectValue = value;
	        	}
        	}
        }
    }
    
    public String getWhere() {
    	
    	List