com.solarmetric.rd.kodo.impl.jdbc.query.exp
Class CompareExpression

java.lang.Object
  |
  +--com.solarmetric.rd.kodo.impl.jdbc.query.exp.CompareExpression

All Implemented Interfaces:

Expression, JDBCExpression

public class CompareExpression

extends java.lang.Object

implements JDBCExpression

Compares two values.

Field Summary

static java.lang.String	GREATER
static java.lang.String	GREATER_EQUAL
static java.lang.String	LESS
static java.lang.String	LESS_EQUAL

Constructor Summary

CompareExpression(com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue val1, com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue val2, java.lang.String op)
Constructor.

Method Summary

void	appendOrdering(com.solarmetric.rd.kodo.impl.jdbc.schema.SQLBuffer[] orders, boolean[] ascending, int idx, com.solarmetric.rd.kodo.runtime.PersistenceManagerImpl pm, java.util.Map params) Append the ordering for this expression to the given buffer.
void	appendTo(com.solarmetric.rd.kodo.impl.jdbc.schema.SQLBuffer buf, com.solarmetric.rd.kodo.runtime.PersistenceManagerImpl pm, java.util.Map params) Append the SQL for this expression to the given buffer.
com.solarmetric.rd.kodo.impl.jdbc.runtime.Joins	getJoins() Return the joins for this expression.
void	initialize(com.solarmetric.rd.kodo.runtime.PersistenceManagerImpl pm, com.solarmetric.rd.kodo.impl.jdbc.runtime.Select select, java.util.Map containsCounts) Initialize the expression.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LESS

public static final java.lang.String LESS

See Also:

Constant Field Values

GREATER

public static final java.lang.String GREATER

See Also:

Constant Field Values

LESS_EQUAL

public static final java.lang.String LESS_EQUAL

See Also:

Constant Field Values

GREATER_EQUAL

public static final java.lang.String GREATER_EQUAL

See Also:

Constant Field Values

Constructor Detail

CompareExpression

public CompareExpression(com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue val1,
                         com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue val2,
                         java.lang.String op)

Constructor. Supply values and operator.

Method Detail

initialize

public void initialize(com.solarmetric.rd.kodo.runtime.PersistenceManagerImpl pm,
                       com.solarmetric.rd.kodo.impl.jdbc.runtime.Select select,
                       java.util.Map containsCounts)

Description copied from interface: JDBCExpression

Initialize the expression. This method should recursively initialize any sub-expressions or values. It should also cache the Joins instance containing the joins for this expression.

Specified by:

initialize in interface JDBCExpression

Parameters:

pm - the persistence manager for this query

select - manage joins made in each query clause

containsCounts - map of relation paths to the number of times the paths appear in a contains() expression; used to ensure paths used for contains() within the same AND expression used different aliases

appendTo

public void appendTo(com.solarmetric.rd.kodo.impl.jdbc.schema.SQLBuffer buf,
                     com.solarmetric.rd.kodo.runtime.PersistenceManagerImpl pm,
                     java.util.Map params)

Description copied from interface: JDBCExpression

Append the SQL for this expression to the given buffer. The SQL should optinally include any joins this expression needs.

Specified by:

appendTo in interface JDBCExpression

appendOrdering

public void appendOrdering(com.solarmetric.rd.kodo.impl.jdbc.schema.SQLBuffer[] orders,
                           boolean[] ascending,
                           int idx,
                           com.solarmetric.rd.kodo.runtime.PersistenceManagerImpl pm,
                           java.util.Map params)

Description copied from interface: JDBCExpression

Append the ordering for this expression to the given buffer.

Specified by:

appendOrdering in interface JDBCExpression

getJoins

public com.solarmetric.rd.kodo.impl.jdbc.runtime.Joins getJoins()

Description copied from interface: JDBCExpression

Return the joins for this expression. These joins should be created and cached during the JDBCExpression.initialize(com.solarmetric.rd.kodo.runtime.PersistenceManagerImpl, com.solarmetric.rd.kodo.impl.jdbc.runtime.Select, java.util.Map) method. The parent expression might modify these joins during its own initialization so that common joins are moved up the expression tree.

Specified by:

getJoins in interface JDBCExpression