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java.lang.Object | +--org.jfree.data.AbstractDataset | +--org.jfree.data.DefaultPieDataset | +--org.jfree.data.JDBCPieDataset
A pie dataset that reads data from a database via JDBC.
A query should be supplied that returns data in two columns, the first containing VARCHAR data, and the second containing numerical data. The data is cached in-memory and can be refreshed at any time.
Constructor Summary | |
JDBCPieDataset(java.sql.Connection con)
Creates a new JDBCPieDataset using a pre-existing database connection. |
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JDBCPieDataset(java.sql.Connection con,
java.lang.String query)
Creates a new JDBCPieDataset using a pre-existing database connection. |
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JDBCPieDataset(java.lang.String url,
java.lang.String driverName,
java.lang.String user,
java.lang.String passwd)
Creates a new JDBCPieDataset and establishes a new database connection. |
Method Summary | |
void |
executeQuery(java.lang.String query)
ExecuteQuery will attempt execute the query passed to it against the existing database connection. |
Methods inherited from class org.jfree.data.DefaultPieDataset |
equals, getIndex, getItemCount, getKey, getKeys, getValue, getValue, setValue, setValue |
Methods inherited from class org.jfree.data.AbstractDataset |
addChangeListener, fireDatasetChanged, getGroup, notifyListeners, removeChangeListener, setGroup |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.jfree.data.Dataset |
addChangeListener, getGroup, removeChangeListener, setGroup |
Constructor Detail |
public JDBCPieDataset(java.lang.String url, java.lang.String driverName, java.lang.String user, java.lang.String passwd)
url
- the URL of the database connection.driverName
- The database driver class name.user
- The database user.passwd
- The database users password.public JDBCPieDataset(java.sql.Connection con)
The dataset is initially empty, since no query has been supplied yet.
con
- the database connection.public JDBCPieDataset(java.sql.Connection con, java.lang.String query)
The dataset is initialised with the supplied query.
con
- the database connection.query
- the database connection.Method Detail |
public void executeQuery(java.lang.String query)
query
- The query to be executed
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