List of treat() Examples

Examples of treat()

org.eclipse.persistence.expressions.Expression.treat()

ADVANCED: Return an expression that allows you to treat its base as if it were a subclass of the class returned by the base This can only be called on an ExpressionBuilder, the result of expression.get(String), expression.getAllowingNull(String), the result of expression.anyOf("String") or the result of expression.anyOfAllowingNull("String") as does not guarantee the results of the downcast will be of the specified class and should be used in conjunction with a Expression.type()

Example:

 EclipseLink: employee.get("project").as(LargeProject.class).get("budget").equal(1000) Java: ((LargeProject)employee.getProjects().get(0)).getBudget() == 1000 SQL: LPROJ.PROJ_ID (+)= PROJ.PROJ_ID AND L_PROJ.BUDGET = 1000


    public Expression twistedForBaseAndContext(Expression newBase,
            Expression context, Expression oldBase) {
        if (oldBase == null || this.typeExpressionBase == oldBase) {
            Expression twistedBase = this.typeExpressionBase.twistedForBaseAndContext(newBase, context, oldBase);
            TreatAsExpression result = (TreatAsExpression)twistedBase.treat(this.castClass);
            if (shouldUseOuterJoin) {
                result.doUseOuterJoin();
            }
            if (shouldQueryToManyRelationship) {
                result.doQueryToManyRelationship();

     * This expression is built on a different base than the one we want. Rebuild it and
     * return the root of the new tree
     */
    public Expression rebuildOn(Expression newBase) {
        Expression newLocalBase = this.typeExpressionBase.rebuildOn(newBase);
        return newLocalBase.treat(castClass);
    }


    public ClassDescriptor getDescriptor() {
        if (isAttribute()) {
            //TODO: add support for treat on attributes

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of treat()

Examples of org.eclipse.persistence.expressions.Expression.treat()

Examples of org.eclipse.persistence.expressions.Expression.treat()