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/*
 * Copyright 2009 Day Management AG, Switzerland. All rights reserved.
 */
package javax.jcr.query.qom;

/**
 * Tests whether the value of a property in a first selector is equal to the
 * value of a property in a second selector.
 * 
 * A node-tuple satisfies the constraint only if: 
 {@link
 * #getSelector1Name selector1} has a property named {@link #getProperty1Name
 * property1}, and
 {@link #getSelector2Name selector2} has a property
 * named {@link #getProperty2Name property2}, and
 the value of {@link
 * #getProperty1Name property1} equals the value of {@link #getProperty2Name
 * property2}
 
 *
 * @since JCR 2.0
 */
public interface EquiJoinCondition
        extends JoinCondition {
    /**
     * Gets the name of the first selector.
     *
     * @return the selector name; non-null
     */
    public String getSelector1Name();

    /**
     * Gets the property name in the first selector.
     *
     * @return the property name; non-null
     */
    public String getProperty1Name();

    /**
     * Gets the name of the second selector.
     *
     * @return the selector name; non-null
     */
    public String getSelector2Name();

    /**
     * Gets the property name in the second selector.
     *
     * @return the property name; non-null
     */
    public String getProperty2Name();
}