org.apache.derby.iapi.sql.dictionary: public class: ColumnDescriptorList

org.apache.derby.iapi.sql.dictionary
public class: ColumnDescriptorList [javadoc | source]

java.lang.Object
   java.util.AbstractCollection
      java.util.AbstractList
         java.util.ArrayList
            org.apache.derby.iapi.sql.dictionary.ColumnDescriptorList

All Implemented Interfaces:
List, java$io$Serializable, RandomAccess, Cloneable, Collection

This represents a list of column descriptors.

Fields inherited from java.util.AbstractList:
modCount

Method from org.apache.derby.iapi.sql.dictionary.ColumnDescriptorList Summary:
add, elementAt, getColumnDescriptor, getColumnDescriptor, getColumnNames

Methods from java.util.ArrayList:
add, add, addAll, addAll, clear, clone, contains, ensureCapacity, get, indexOf, isEmpty, lastIndexOf, remove, remove, removeRange, set, size, toArray, toArray, trimToSize

Methods from java.util.AbstractList:
add, add, addAll, clear, equals, get, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, remove, removeRange, set, subList

Methods from java.util.AbstractCollection:
add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray, toString

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.apache.derby.iapi.sql.dictionary.ColumnDescriptorList Detail:
public void add(UUID tableID, ColumnDescriptor column) { /* RESOLVE: The interface includes tableID because presumably the primary key for the columns table will be tableID + columnID (or possibly tableID + column name - both column name and ID must be unique within a table). However, the ColumnDescriptor contains a reference to a tableID, so it seems like we don't need the parameter here. I am going ** to leave it here just in case we decide we need it later. */ add(column); } Add the column. Currently, the table id is ignored.
public ColumnDescriptor elementAt(int n) { return (ColumnDescriptor) get(n); } Return the nth (0-based) element in the list.
public ColumnDescriptor getColumnDescriptor(UUID tableID, String columnName) { ColumnDescriptor returnValue = null; for (Iterator iterator = iterator(); iterator.hasNext(); ) { ColumnDescriptor columnDescriptor = (ColumnDescriptor) iterator.next(); if ( columnName.equals( columnDescriptor.getColumnName() ) && tableID.equals( columnDescriptor.getReferencingUUID() ) ) { returnValue = columnDescriptor; break; } } return returnValue; } Get the column descriptor
public ColumnDescriptor getColumnDescriptor(UUID tableID, int columnID) { ColumnDescriptor returnValue = null; for (Iterator iterator = iterator(); iterator.hasNext(); ) { ColumnDescriptor columnDescriptor = (ColumnDescriptor) iterator.next(); if ( ( columnID == columnDescriptor.getPosition() ) && tableID.equals( columnDescriptor.getReferencingUUID() ) ) { returnValue = columnDescriptor; break; } } return returnValue; } Get the column descriptor
public String[] getColumnNames() { String strings[] = new String[size()]; int size = size(); for (int index = 0; index < size; index++) { ColumnDescriptor columnDescriptor = elementAt(index); strings[index] = columnDescriptor.getColumnName(); } return strings; } Get an array of strings for all the columns in this CDL.

Method from org.apache.derby.iapi.sql.dictionary.ColumnDescriptorList Detail:

 public  void add(UUID tableID,
    ColumnDescriptor column) {
		/*
		** RESOLVE: The interface includes tableID because presumably
		** the primary key for the columns table will be tableID +
		** columnID (or possibly tableID + column name - both column
		** name and ID must be unique within a table).  However, the
		** ColumnDescriptor contains a reference to a tableID, so it
		** seems like we don't need the parameter here.  I am going
		** to leave it here just in case we decide we need it later.
		*/
		add(column);
}

Add the column. Currently, the table id is ignored.

 public ColumnDescriptor elementAt(int n) {
		return (ColumnDescriptor) get(n);
}

Return the nth (0-based) element in the list.

 public ColumnDescriptor getColumnDescriptor(UUID tableID,
    String columnName) {
		ColumnDescriptor	returnValue = null;
		for (Iterator iterator = iterator(); iterator.hasNext(); )
		{
			ColumnDescriptor columnDescriptor = (ColumnDescriptor) iterator.next();
			if ( columnName.equals( columnDescriptor.getColumnName() ) &&
			    tableID.equals( columnDescriptor.getReferencingUUID() ) )
			{
				returnValue = columnDescriptor;
				break;
			}
		}
		return returnValue;
}

Get the column descriptor

 public ColumnDescriptor getColumnDescriptor(UUID tableID,
    int columnID) {
		ColumnDescriptor	returnValue = null;
		for (Iterator iterator = iterator(); iterator.hasNext(); )
		{
			ColumnDescriptor columnDescriptor = (ColumnDescriptor) iterator.next();
			if ( ( columnID == columnDescriptor.getPosition() ) &&
				tableID.equals( columnDescriptor.getReferencingUUID() ) )
			{
				returnValue = columnDescriptor;
				break;
			}
		}
		return returnValue;
}

Get the column descriptor

 public String[] getColumnNames() {
		String strings[] = new String[size()];
		int size = size();
		for (int index = 0; index <  size; index++)
		{
			ColumnDescriptor columnDescriptor = elementAt(index);
			strings[index] = columnDescriptor.getColumnName();
		}
		return strings;
}

Get an array of strings for all the columns in this CDL.