Package org.jfree.util
Class ObjectTable
- java.lang.Object
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- org.jfree.util.ObjectTable
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- All Implemented Interfaces:
java.io.Serializable
public class ObjectTable extends java.lang.Object implements java.io.Serializable
A lookup table for objects. This implementation is not synchronized, it is up to the caller to synchronize it properly.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description private int
columnIncrement
Defines how many object-slots get reserved each time we run out of space.private int
columns
The number of columns.private java.lang.Object[][]
data
An array of objects.private int
rowIncrement
Defines how many object-slots get reserved each time we run out of space.private int
rows
The number of rows.private static long
serialVersionUID
For serialization.
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Constructor Summary
Constructors Constructor Description ObjectTable()
Creates a new table.ObjectTable(int increment)
Creates a new table.ObjectTable(int rowIncrement, int colIncrement)
Creates a new table.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
Clears the table.protected void
copyColumn(int oldColumn, int newColumn)
Copys the contents of the old column to the new column.protected void
copyRow(int oldRow, int newRow)
Copys the contents of the old row to the new row.void
ensureCapacity(int row, int column)
Ensures that there is storage capacity for the specified item.protected void
ensureRowCapacity(int row)
Checks that there is storage capacity for the specified row and resizes if necessary.boolean
equals(java.lang.Object o)
Tests this paint table for equality with another object (typically also anObjectTable
).int
getColumnCount()
Returns the number of columns in the table.int
getColumnIncrement()
Returns the column size increment.protected java.lang.Object[][]
getData()
Returns the table data.protected java.lang.Object
getObject(int row, int column)
Returns the object from a particular cell in the table.int
getRowCount()
Returns the number of rows in the table.int
getRowIncrement()
Returns the row size increment.int
hashCode()
Returns a hash code value for the object.private void
readObject(java.io.ObjectInputStream stream)
Restores a serialized object.protected java.lang.Object
readSerializedData(java.io.ObjectInputStream stream)
Handles the deserialization of a single element of the table.protected void
setData(java.lang.Object[][] data, int colCount)
Sets the table data.protected void
setObject(int row, int column, java.lang.Object object)
Sets the object for a cell in the table.private void
writeObject(java.io.ObjectOutputStream stream)
Handles serialization.protected void
writeSerializedData(java.io.ObjectOutputStream stream, java.lang.Object o)
Handles the serialization of an single element of this table.
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Field Detail
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serialVersionUID
private static final long serialVersionUID
For serialization.- See Also:
- Constant Field Values
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rows
private int rows
The number of rows.
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columns
private int columns
The number of columns.
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data
private transient java.lang.Object[][] data
An array of objects. The array may containnull
values.
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rowIncrement
private int rowIncrement
Defines how many object-slots get reserved each time we run out of space.
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columnIncrement
private int columnIncrement
Defines how many object-slots get reserved each time we run out of space.
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Constructor Detail
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ObjectTable
public ObjectTable()
Creates a new table.
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ObjectTable
public ObjectTable(int increment)
Creates a new table.- Parameters:
increment
- the row and column size increment.
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ObjectTable
public ObjectTable(int rowIncrement, int colIncrement)
Creates a new table.- Parameters:
rowIncrement
- the row size increment.colIncrement
- the column size increment.
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Method Detail
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getColumnIncrement
public int getColumnIncrement()
Returns the column size increment.- Returns:
- the increment.
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getRowIncrement
public int getRowIncrement()
Returns the row size increment.- Returns:
- the increment.
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ensureRowCapacity
protected void ensureRowCapacity(int row)
Checks that there is storage capacity for the specified row and resizes if necessary.- Parameters:
row
- the row index.
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ensureCapacity
public void ensureCapacity(int row, int column)
Ensures that there is storage capacity for the specified item.- Parameters:
row
- the row index.column
- the column index.
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getRowCount
public int getRowCount()
Returns the number of rows in the table.- Returns:
- The row count.
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getColumnCount
public int getColumnCount()
Returns the number of columns in the table.- Returns:
- The column count.
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getObject
protected java.lang.Object getObject(int row, int column)
Returns the object from a particular cell in the table. Returns null, if there is no object at the given position.Note: throws IndexOutOfBoundsException if row or column is negative.
- Parameters:
row
- the row index (zero-based).column
- the column index (zero-based).- Returns:
- The object.
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setObject
protected void setObject(int row, int column, java.lang.Object object)
Sets the object for a cell in the table. The table is expanded if necessary.- Parameters:
row
- the row index (zero-based).column
- the column index (zero-based).object
- the object.
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equals
public boolean equals(java.lang.Object o)
Tests this paint table for equality with another object (typically also anObjectTable
).- Overrides:
equals
in classjava.lang.Object
- Parameters:
o
- the other object.- Returns:
- A boolean.
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hashCode
public int hashCode()
Returns a hash code value for the object.- Overrides:
hashCode
in classjava.lang.Object
- Returns:
- the hashcode
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writeObject
private void writeObject(java.io.ObjectOutputStream stream) throws java.io.IOException
Handles serialization.- Parameters:
stream
- the output stream.- Throws:
java.io.IOException
- if there is an I/O problem.
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writeSerializedData
protected void writeSerializedData(java.io.ObjectOutputStream stream, java.lang.Object o) throws java.io.IOException
Handles the serialization of an single element of this table.- Parameters:
stream
- the stream which should write the objecto
- the object that should be serialized- Throws:
java.io.IOException
- if an IO error occured
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readObject
private void readObject(java.io.ObjectInputStream stream) throws java.io.IOException, java.lang.ClassNotFoundException
Restores a serialized object.- Parameters:
stream
- the input stream.- Throws:
java.io.IOException
- if there is an I/O problem.java.lang.ClassNotFoundException
- if a class cannot be found.
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readSerializedData
protected java.lang.Object readSerializedData(java.io.ObjectInputStream stream) throws java.lang.ClassNotFoundException, java.io.IOException
Handles the deserialization of a single element of the table.- Parameters:
stream
- the object input stream from which to read the object.- Returns:
- the deserialized object
- Throws:
java.lang.ClassNotFoundException
- if a class cannot be found.java.io.IOException
- Any of the usual Input/Output related exceptions.
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clear
public void clear()
Clears the table.
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copyColumn
protected void copyColumn(int oldColumn, int newColumn)
Copys the contents of the old column to the new column.- Parameters:
oldColumn
- the index of the old (source) columnnewColumn
- the index of the new column
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copyRow
protected void copyRow(int oldRow, int newRow)
Copys the contents of the old row to the new row. This uses raw access to the data and is remarkably faster than manual copying.- Parameters:
oldRow
- the index of the old rownewRow
- the index of the new row
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setData
protected void setData(java.lang.Object[][] data, int colCount)
Sets the table data.- Parameters:
data
- the data.colCount
- the number of columns.
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getData
protected java.lang.Object[][] getData()
Returns the table data.- Returns:
- The table data.
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