Package org.eclipse.persistence.expressions

Examples of org.eclipse.persistence.expressions.ExpressionOperator

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    /**
     * INTERNAL:
     * Use TRIM(FROM ?) function for trim.
     */
    public static ExpressionOperator trimOperator() {
        ExpressionOperator exOperator = new ExpressionOperator();
        exOperator.setType(ExpressionOperator.FunctionOperator);
        exOperator.setSelector(ExpressionOperator.Trim);
        Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(2);
        v.addElement("TRIM(FROM ");
        v.addElement(")");
        exOperator.printsAs(v);
        exOperator.bePrefix();
        exOperator.setNodeClass(ClassConstants.FunctionExpression_Class);
        return exOperator;
    }
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     * INTERNAL:
     * Build HSQL equivalent to RTRIM(string_exp, character).
     * HSQL: TRIM(TRAILING character FROM string_exp)
     */
    protected ExpressionOperator rightTrim2() {
        ExpressionOperator exOperator = new ExpressionOperator();
        exOperator.setType(ExpressionOperator.FunctionOperator);
        exOperator.setSelector(ExpressionOperator.RightTrim2);
        Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(5);
        v.addElement("TRIM(TRAILING ");
        v.addElement(" FROM ");
        v.addElement(")");
        exOperator.printsAs(v);
        exOperator.bePrefix();
        int[] indices = {1, 0};
        exOperator.setArgumentIndices(indices);
        exOperator.setNodeClass(ClassConstants.FunctionExpression_Class);
        return exOperator;
    }
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     * INTERNAL:
     * Build HSQL equivalent to GREATEST(x, y)
     * HSQL: CASE WHEN x >= y THEN x ELSE y
     */
    protected ExpressionOperator greatest() {
        ExpressionOperator exOperator = new ExpressionOperator();
        exOperator.setType(ExpressionOperator.FunctionOperator);
        exOperator.setSelector(ExpressionOperator.Greatest);
        Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(5);
        v.addElement("CASEWHEN(");
        v.addElement(" >= ");
        v.addElement(", ");
        v.addElement(", ");
        v.addElement(")");
        exOperator.printsAs(v);
        exOperator.bePrefix();
        int[] indices = {0, 1, 0, 1};
        exOperator.setArgumentIndices(indices);
        exOperator.setNodeClass(ClassConstants.FunctionExpression_Class);
        return exOperator;
    }
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    /**
     *  Create the log operator for this platform
     */
    protected ExpressionOperator logOperator() {
        ExpressionOperator result = new ExpressionOperator();
        result.setSelector(ExpressionOperator.Log);
        Vector v = NonSynchronizedVector.newInstance(2);
        v.addElement("LOG(10,");
        v.addElement(")");
        result.printsAs(v);
        result.bePrefix();
        result.setNodeClass(FunctionExpression.class);
        return result;

    }
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    /**
     * Create the outer join operator for this platform
     */
    protected ExpressionOperator operatorOuterJoin() {
        ExpressionOperator result = new ExpressionOperator();
        result.setSelector(ExpressionOperator.EqualOuterJoin);
        Vector v = NonSynchronizedVector.newInstance(2);
        v.addElement(" (+) = ");
        result.printsAs(v);
        result.bePostfix();
        result.setNodeClass(RelationExpression.class);
        return result;

    }
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    /**
     * INTERNAL:
     * Override the default locate operator
     */
    protected ExpressionOperator operatorLocate() {
        ExpressionOperator result = new ExpressionOperator();
        result.setSelector(ExpressionOperator.Locate);
        Vector v = NonSynchronizedVector.newInstance(2);
        v.addElement("INSTR(");
        v.addElement(", ");
        v.addElement(")");
        result.printsAs(v);
        result.bePrefix();
        result.setNodeClass(RelationExpression.class);
        return result;
    }
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    /**
     * INTERNAL:
     * Override the default locate operator
     */
    protected ExpressionOperator operatorLocate2() {
        ExpressionOperator result = new ExpressionOperator();
        result.setSelector(ExpressionOperator.Locate2);
        Vector v = NonSynchronizedVector.newInstance(2);
        v.addElement("INSTR(");
        v.addElement(", ");
        v.addElement(", ");
        v.addElement(")");
        result.printsAs(v);
        result.bePrefix();
        result.setNodeClass(RelationExpression.class);
        return result;
    }
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    /**
     * INTERNAL:
     * Use CONVERT function for toNumber.
     */
    public static ExpressionOperator toNumberOperator() {
        ExpressionOperator exOperator = new ExpressionOperator();
        exOperator.setType(ExpressionOperator.FunctionOperator);
        exOperator.setSelector(ExpressionOperator.ToNumber);
        Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(2);
        v.addElement("CONVERT(");
        v.addElement(",DECIMAL)");
        exOperator.printsAs(v);
        exOperator.bePrefix();
        exOperator.setNodeClass(ClassConstants.FunctionExpression_Class);
        return exOperator;
    }
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    /**
     * INTERNAL:
     * Create the 10 based log operator for this platform.
     */
    protected ExpressionOperator logOperator() {
        ExpressionOperator result = new ExpressionOperator();
        result.setSelector(ExpressionOperator.Log);
        Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(2);
        v.addElement("LOG(10, ");
        v.addElement(")");
        result.printsAs(v);
        result.bePrefix();
        result.setNodeClass(FunctionExpression.class);
        return result;

    }
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    /**
     * INTERNAL:
     * Build MySQL equivalent to TO_NUMBER.
     */
    protected ExpressionOperator toNumberOperator() {
        ExpressionOperator exOperator = new ExpressionOperator();
        exOperator.setType(ExpressionOperator.FunctionOperator);
        exOperator.setSelector(ExpressionOperator.ToNumber);
        Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(2);
        v.addElement("CONVERT(");
        v.addElement(", SIGNED)");
        exOperator.printsAs(v);
        exOperator.bePrefix();
        exOperator.setNodeClass(ClassConstants.FunctionExpression_Class);
        return exOperator;
    }
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Related Classes of org.eclipse.persistence.expressions.ExpressionOperator

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  • org.eclipse.persistence.internal.expressions.SpatialExpressionOperators
  • org.eclipse.persistence.internal.security.PrivilegedNewInstanceFromClass
  • org.eclipse.persistence.internal.sessions.factories.ObjectPersistenceRuntimeXMLProject
  • org.eclipse.persistence.platform.database.DerbyPlatform
  • org.eclipse.persistence.platform.database.FirebirdPlatform
  • org.eclipse.persistence.platform.database.H2Platform
  • org.eclipse.persistence.platform.database.HANAPlatform
  • org.eclipse.persistence.platform.database.HSQLPlatform
  • org.eclipse.persistence.platform.database.Informix11Platform
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