oracle.javatools.db.sql
Class FromObject

java.lang.Object
  oracle.javatools.db.AbstractDBObject
      oracle.javatools.db.AbstractChildDBObject
          oracle.javatools.db.sql.AbstractSQLFragment
              oracle.javatools.db.sql.AbstractAliasFragment
                  oracle.javatools.db.sql.FromObject

All Implemented Interfaces:

ChildDBObject, DBObject, AliasFragment, SQLFragment, Copyable, DynamicPropertySet

public class FromObject
extends AbstractAliasFragment

Object that represents a clause in the FROM statement of a SQL query.

Since:

10.1.3

Nested Class Summary

Nested classes/interfaces inherited from class oracle.javatools.db.AbstractDBObject

AbstractDBObject.ChildSupport

Field Summary

static java.lang.String

TYPE

Fields inherited from class oracle.javatools.db.sql.AbstractSQLFragment

DEFAULT_SEPARATOR, EMPTY, EMPTY_ARRAY, NEWLINE, SPACE

Fields inherited from interface oracle.javatools.db.sql.SQLFragment

CONNECTBY, FROM, GROUPBY, HAVING, NOCYCLE, ORDERBY, SELECT, STARTWITH, WHERE

Fields inherited from interface oracle.javatools.db.DBObject

COMMENT

Constructor Summary

FromObject()
Create an empty FROM object.

FromObject(SQLFragment expression, java.lang.String alias)
Create a FROM object with the given expression and alias.

Method Summary

boolean	canHaveAlias() In certain circumstances an AliasFragment cannot have an alias.
DBObject	copyTo(DBObject target, DBObject copyParent, IDPolicy idPolicy) Internal copy method used by the API to perform copy operations.
boolean	equals(java.lang.Object obj)
java.lang.String	getType() Returns the type of this object.
void	setExpression(SQLFragment exp) Sets the expression part of the fragment.

Methods inherited from class oracle.javatools.db.sql.AbstractAliasFragment

canUseAsAlias, copyToImpl, equalsImpl, getAlias, getExpression, getName, getOwnedObjectsImpl, getSQLText, getUsableAlias, setAlias, setName, toString, useAsBeforeAlias

Methods inherited from class oracle.javatools.db.sql.AbstractSQLFragment

appendToBuffer, argsToString, getTextOrNull, getTextOrNull, setParent, surroundWithBrackets, surroundWithBrackets

Methods inherited from class oracle.javatools.db.AbstractChildDBObject

copyToImpl, findParent, getParent

Methods inherited from class oracle.javatools.db.AbstractDBObject

changeParent, compareToImpl, copyObject, copyTo, copyTo, copyTo, copyToImpl, equalsImpl, findOwnedObject, findOwnedObject, findOwnedObject, getChildSupport, getID, getOwnedObjects, getOwnedObjects, getProperties, getProperty, getProperty, getReferenceIDs, getReferenceIDsImpl, hashCode, includeOwnedObject, includesType, includesType, removeThisAsParent, replaceReferenceIDs, setID, setProperties, setProperty

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface oracle.javatools.db.ChildDBObject

getParent, setParent

Methods inherited from interface oracle.javatools.db.DBObject

copyTo, copyTo, copyTo, findOwnedObject, findOwnedObject, getID, getOwnedObjects, getOwnedObjects, getReferenceIDs, replaceReferenceIDs, setID

Methods inherited from interface oracle.javatools.util.DynamicPropertySet

getProperties, getProperty, getProperty, setProperties, setProperty

Field Detail

TYPE

public static final java.lang.String TYPE

See Also:

Constant Field Values

Constructor Detail

FromObject

public FromObject()

Create an empty FROM object.

FromObject

public FromObject(SQLFragment expression,
                  java.lang.String alias)

Create a FROM object with the given expression and alias.

Method Detail

getType

public java.lang.String getType()

Description copied from interface: DBObject

Returns the type of this object. Valid types include things like tables, views, synonyms, and columns.

Specified by:

getType in interface DBObject

Overrides:

getType in class AbstractSQLFragment

Returns:

a string describing the type of object.

copyTo

public DBObject copyTo(DBObject target,
                       DBObject copyParent,
                       IDPolicy idPolicy)

Description copied from class: AbstractDBObject

Internal copy method used by the API to perform copy operations. All objects must implement this method if they are instantiable objects. Abstract objects (e.g. Relation) must NOT implement this method. The implementation should delegate to the copyToImpl method to copy the actual properties.

This method does not fix internal reference ids on copy. That is done by the calling DBObject.copyTo(DBObject, IDPolicy) method.

Specified by:

copyTo in class AbstractDBObject

See Also:

DBObject.copyTo(java.lang.Object), DBObject.copyTo(DBObject, boolean), AbstractDBObject.copyToImpl(oracle.javatools.db.AbstractDBObject, oracle.javatools.db.DBObject, oracle.javatools.db.IDPolicy)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

setExpression

public void setExpression(SQLFragment exp)

Description copied from class: AbstractAliasFragment

Sets the expression part of the fragment.

Specified by:

setExpression in interface AliasFragment

Overrides:

setExpression in class AbstractAliasFragment

canHaveAlias

public boolean canHaveAlias()

Description copied from class: AbstractAliasFragment

In certain circumstances an AliasFragment cannot have an alias. This method returns false if that is the case.

Overrides:

canHaveAlias in class AbstractAliasFragment