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AbstractRoutingDataSource consistently implements JDBC 4.0's Wrapper interface as well

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Issue: SPR-9856
This commit is contained in:
Juergen Hoeller
2012-10-04 13:22:05 +02:00
committed by unknown
parent 93aa411886
commit 9ff640a95d
1 changed files with 29 additions and 15 deletions
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44
spring-jdbc/src/main/java/org/springframework/jdbc/datasource/lookup/AbstractRoutingDataSource.java
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@@ -1,5 +1,5 @@
/* /*
* Copyright 2002-2010 the original author or authors. * Copyright 2002-2012 the original author or authors.
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. * you may not use this file except in compliance with the License.
@@ -51,6 +51,7 @@ public abstract class AbstractRoutingDataSource extends AbstractDataSource imple
private DataSource resolvedDefaultDataSource; private DataSource resolvedDefaultDataSource;
/** /**
* Specify the map of target DataSources, with the lookup key as key. * Specify the map of target DataSources, with the lookup key as key.
* The mapped value can either be a corresponding {@link javax.sql.DataSource} * The mapped value can either be a corresponding {@link javax.sql.DataSource}
@@ -121,6 +122,19 @@ public abstract class AbstractRoutingDataSource extends AbstractDataSource imple
} }
} }
/**
* Resolve the given lookup key object, as specified in the
* {@link #setTargetDataSources targetDataSources} map, into
* the actual lookup key to be used for matching with the
* {@link #determineCurrentLookupKey() current lookup key}.
* <p>The default implementation simply returns the given key as-is.
* @param lookupKey the lookup key object as specified by the user
* @return the lookup key as needed for matching
*/
protected Object resolveSpecifiedLookupKey(Object lookupKey) {
return lookupKey;
}
/** /**
* Resolve the specified data source object into a DataSource instance. * Resolve the specified data source object into a DataSource instance.
* <p>The default implementation handles DataSource instances and data source * <p>The default implementation handles DataSource instances and data source
@@ -152,6 +166,20 @@ public abstract class AbstractRoutingDataSource extends AbstractDataSource imple
return determineTargetDataSource().getConnection(username, password); return determineTargetDataSource().getConnection(username, password);
} }
@Override
@SuppressWarnings("unchecked")
public <T> T unwrap(Class<T> iface) throws SQLException {
if (iface.isInstance(this)) {
return (T) this;
}
return determineTargetDataSource().unwrap(iface);
}
@Override
public boolean isWrapperFor(Class<?> iface) throws SQLException {
return (iface.isInstance(this) || determineTargetDataSource().isWrapperFor(iface));
}
/** /**
* Retrieve the current target DataSource. Determines the * Retrieve the current target DataSource. Determines the
* {@link #determineCurrentLookupKey() current lookup key}, performs * {@link #determineCurrentLookupKey() current lookup key}, performs
@@ -173,20 +201,6 @@ public abstract class AbstractRoutingDataSource extends AbstractDataSource imple
return dataSource; return dataSource;
} }
/**
* Resolve the given lookup key object, as specified in the
* {@link #setTargetDataSources targetDataSources} map, into
* the actual lookup key to be used for matching with the
* {@link #determineCurrentLookupKey() current lookup key}.
* <p>The default implementation simply returns the given key as-is.
* @param lookupKey the lookup key object as specified by the user
* @return the lookup key as needed for matching
*/
protected Object resolveSpecifiedLookupKey(Object lookupKey) {
return lookupKey;
}
/** /**
* Determine the current lookup key. This will typically be * Determine the current lookup key. This will typically be
* implemented to check a thread-bound transaction context. * implemented to check a thread-bound transaction context.