Removed the isInterfaceSupported method. It not make sense in PHP5.

cake/libs/model/datasources/datasource.php

@@ -276,20 +276,6 @@ class DataSource extends Object {
 		return true;
 	}
 
-/**
- * Returns true if the DataSource supports the given interface (method)
- *
- * @param string $interface The name of the interface (method)
- * @return boolean True on success
- */
-	public function isInterfaceSupported($interface) {
-		static $methods = false;
-		if ($methods === false) {
-			$methods = get_class_methods($this);
-		}
-		return in_array($interface, $methods);
-	}
-
 /**
  * Sets the configuration for the DataSource.
  * Merges the $config information with the _baseConfig and the existing $config property.

cake/libs/model/datasources/dbo_source.php

@@ -3065,7 +3065,7 @@ class DboSource extends DataSource {
  */
 	public function readTableParameters($name) {
 		$parameters = array();
-		if ($this->isInterfaceSupported('listDetailedSources')) {
+		if (method_exists($this, 'listDetailedSources')) {
 			$currentTableDetails = $this->listDetailedSources($name);
 			foreach ($this->tableParameters as $paramName => $parameter) {
 				if (!empty($parameter['column']) && !empty($currentTableDetails[$parameter['column']])) {

cake/libs/model/model.php

@@ -798,7 +798,7 @@ class Model extends Object {
 		$db = ConnectionManager::getDataSource($this->useDbConfig);
 		$db->cacheSources = ($this->cacheSources && $db->cacheSources);
 
-		if ($db->isInterfaceSupported('listSources')) {
+		if (method_exists($db, 'listSources')) {
 			$sources = $db->listSources();
 			if (is_array($sources) && !in_array(strtolower($this->tablePrefix . $tableName), array_map('strtolower', $sources))) {
 				throw new MissingTableException(array(
@@ -981,7 +981,7 @@ class Model extends Object {
 		if (!is_array($this->_schema) || $field === true) {
 			$db = $this->getDataSource();
 			$db->cacheSources = ($this->cacheSources && $db->cacheSources);
-			if ($db->isInterfaceSupported('describe') && $this->useTable !== false) {
+			if (method_exists($db, 'describe') && $this->useTable !== false) {
 				$this->_schema = $db->describe($this, $field);
 			} elseif ($this->useTable === false) {
 				$this->_schema = array();

cake/libs/view/elements/sql_dump.ctp

@@ -26,7 +26,7 @@ if ($noLogs):
 	$logs = array();
 	foreach ($sources as $source):
 		$db =& ConnectionManager::getDataSource($source);
-		if (!$db->isInterfaceSupported('getLog')):
+		if (!method_exists($db, 'getLog')):
 			continue;
 		endif;
 		$logs[$source] = $db->getLog();

cake/tests/cases/libs/model/model_write.test.php

@@ -2987,10 +2987,6 @@ class ModelWriteTest extends BaseModelTest {
 		$db = ConnectionManager::create('mock_transaction', array(
 			'datasource' => 'MockTransactionDbo',
 		));
-		$db->expects($this->at(2))
-			->method('isInterfaceSupported')
-			->with('describe')
-			->will($this->returnValue(true));
 
 		$db->expects($this->once())
 			->method('describe')
@@ -3026,8 +3022,6 @@ class ModelWriteTest extends BaseModelTest {
 		$db->columns = $testDb->columns;
 
 		$db->expects($this->once())->method('rollback');
-		$db->expects($this->any())->method('isInterfaceSupported')
-			->will($this->returnValue(true));
 		$db->expects($this->any())->method('describe')
 			->will($this->returnValue(array(
 				'id' => array('type' => 'integer'),