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    • com.avaje.ebeaninternal.server.expression.AllEqualsExpression Maven / Gradle / Ivy

    package com.avaje.ebeaninternal.server.expression;

import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;

import com.avaje.ebean.event.BeanQueryRequest;
import com.avaje.ebeaninternal.api.ManyWhereJoins;
import com.avaje.ebeaninternal.api.SpiExpression;
import com.avaje.ebeaninternal.api.SpiExpressionRequest;
import com.avaje.ebeaninternal.api.SpiLuceneExpr;
import com.avaje.ebeaninternal.server.deploy.BeanDescriptor;
import com.avaje.ebeaninternal.server.el.ElPropertyDeploy;
import com.avaje.ebeaninternal.server.query.LuceneResolvableRequest;

class AllEqualsExpression implements SpiExpression {

	private static final long serialVersionUID = -8691773558205937025L;
	
	private final Map propMap;

	private final FilterExprPath pathPrefix;
	
	AllEqualsExpression(FilterExprPath pathPrefix, Map propMap) {
	    this.pathPrefix = pathPrefix;
	    this.propMap = propMap;
	}
	
	public boolean isLuceneResolvable(LuceneResolvableRequest req) {
	    return false;
    }

    public SpiLuceneExpr createLuceneExpr(SpiExpressionRequest request) {
        return null;
    }

    protected String name(String propName) {
        if (pathPrefix == null){
            return propName;
        } else {
            String path = pathPrefix.getPath();
            if (path == null || path.length() == 0){
                return propName;
            } else {
                return path+"."+propName;
            }
        }
    }
    
    public void containsMany(BeanDescriptor desc, ManyWhereJoins manyWhereJoin) {
		if (propMap != null){
			Iterator it = propMap.keySet().iterator();
			while (it.hasNext()) {
				String propertyName = it.next();
				ElPropertyDeploy elProp = desc.getElPropertyDeploy(name(propertyName));
				if (elProp != null && elProp.containsMany()){
				    manyWhereJoin.add(elProp);
				}
			}
		}
	}

	public void addBindValues(SpiExpressionRequest request) {
		
		if (propMap.isEmpty()) {
			return;
		}
		Iterator it = propMap.values().iterator();
		while (it.hasNext()) {
			Object value = it.next();
			if (value != null) {
				request.addBindValue(value);
			} else {
				// null value uses is null clause
			}
		}
	}

	public void addSql(SpiExpressionRequest request) {
		
		if (propMap.isEmpty()) {
			return;
		}

		request.append("(");

		Set> entries = propMap.entrySet();
		Iterator> it = entries.iterator();

		int count = 0;
		while (it.hasNext()) {
			Map.Entry entry = it.next();
			Object value = entry.getValue();
			String propName = entry.getKey();

			if (count > 0) {
				request.append("and ");
			}

			request.append(name(propName));
			if (value == null) {
				request.append(" is null ");
			} else {
				request.append(" = ? ");
			}
			count++;
		}
		request.append(")");
	}

	/**
	 * Based on the properties and whether they are null.
	 * 
    
	 * The null check is required due to the "is null" sql being generated.
	 * 
    
	 */
	public int queryAutoFetchHash() {
	
		int hc = AllEqualsExpression.class.getName().hashCode();
		Set> entries = propMap.entrySet();
		Iterator> it = entries.iterator();

		while (it.hasNext()) {
			Map.Entry entry = it.next();
			Object value = entry.getValue();
			String propName = entry.getKey();

			hc = hc * 31 + propName.hashCode();
			hc = hc * 31 + (value == null ? 0 : 1);
		}

		return hc;
	}
	
	public int queryPlanHash(BeanQueryRequest request) {
		return queryAutoFetchHash();
	}
	
	public int queryBindHash() {
		return queryAutoFetchHash();
	}
}
    
    
    
    

    




    
    
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