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

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

All Implemented Interfaces:

Expression, JDBCExpression

Direct Known Subclasses:

EqualExpression, NotEqualExpression

public abstract class CompareEqualExpression

extends java.lang.Object

implements JDBCExpression

Compares two values for equality.

Constructor Summary

CompareEqualExpression(com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue val1, com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue val2)
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.
protected abstract void	appendTo(com.solarmetric.rd.kodo.impl.jdbc.schema.SQLBuffer buf, boolean val1Null, boolean val2Null) Append the SQL for the comparison.
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.
protected boolean	compareValueToNull() Subclasses can override this method if, when they compare to null, they compare the field value rather than the entire field to null.
com.solarmetric.rd.kodo.impl.jdbc.runtime.Joins	getJoins() Return the joins for this expression.
com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue	getValue1()
com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue	getValue2()
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

Constructor Detail

CompareEqualExpression

public CompareEqualExpression(com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue val1,
                              com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue val2)

Constructor. Supply values to compare.

Method Detail

getValue1

public com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue getValue1()

getValue2

public com.solarmetric.rd.kodo.impl.jdbc.query.exp.JDBCValue getValue2()

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

appendTo

protected abstract void appendTo(com.solarmetric.rd.kodo.impl.jdbc.schema.SQLBuffer buf,
                                 boolean val1Null,
                                 boolean val2Null)

Append the SQL for the comparison.

compareValueToNull

protected boolean compareValueToNull()

Subclasses can override this method if, when they compare to null, they compare the field value rather than the entire field to null. For example, field.contains (null) should compare the field value to null, not the field itself.