com.avaje.ebeaninternal.server.expression.InExpression Maven / Gradle / Ivy

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package com.avaje.ebeaninternal.server.expression;

import java.util.Collection;

import com.avaje.ebean.event.BeanQueryRequest;
import com.avaje.ebeaninternal.api.SpiExpressionRequest;
import com.avaje.ebeaninternal.api.SpiLuceneExpr;
import com.avaje.ebeaninternal.server.el.ElPropertyValue;
import com.avaje.ebeaninternal.server.query.LuceneResolvableRequest;

class InExpression extends AbstractExpression {

	private static final long serialVersionUID = 3150665801693551260L;
	
	private final Object[] values;
	
	InExpression(FilterExprPath pathPrefix, String propertyName, Collection coll){
		super(pathPrefix, propertyName);
		values = coll.toArray(new Object[coll.size()]);
	}
	
	InExpression(FilterExprPath pathPrefix, String propertyName, Object[] array){
		super(pathPrefix, propertyName);
		this.values = array;
	}

    @Override
    public boolean isLuceneResolvable(LuceneResolvableRequest req) {
        return false;
    }

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

	public void addBindValues(SpiExpressionRequest request) {
	    
        ElPropertyValue prop = getElProp(request);
	    if (prop != null && !prop.isAssocId()){
	        prop = null;
	    }
	    
		for (int i = 0; i < values.length; i++) {
		    if (prop == null){
	            request.addBindValue(values[i]);
		        
		    } else {
		        // extract the id values from the bean
	            Object[] ids = prop.getAssocOneIdValues(values[i]);
		        if (ids != null){
                    for (int j = 0; j < ids.length; j++) {
                        request.addBindValue(ids[j]);
                    }
                }
		    }
		}
	}

	public void addSql(SpiExpressionRequest request) {
	    
	    if (values.length == 0){
	        // 'no match' for in empty collection
            request.append("1=0");
            return;
	    }

        String propertyName = getPropertyName();

        ElPropertyValue prop = getElProp(request);
        if (prop != null && !prop.isAssocId()) {
            prop = null;
        } 
        
        if (prop != null){
            request.append(prop.getAssocIdInExpr(propertyName));
            String inClause = prop.getAssocIdInValueExpr(values.length);
            request.append(inClause);
            
        } else {
            request.append(propertyName);  
            request.append(" in (?");
            for (int i = 1; i < values.length; i++) {
                request.append(", ").append("?");
            } 
            
            request.append(" ) ");
        }
	}

	/**
	 * Based on the number of values in the in clause.
	 */
	public int queryAutoFetchHash() {
		int hc = InExpression.class.getName().hashCode() + 31 * values.length;
	    hc = hc * 31 + propName.hashCode();
	    return hc;
	}

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

	public int queryBindHash() {
		int hc = 0;
		for (int i = 1; i < values.length; i++) {
			hc = 31*hc + values[i].hashCode();
		}
		return hc;
	}
	
	
}