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Posted to dev@commons.apache.org by ma...@apache.org on 2002/03/13 05:15:49 UTC
cvs commit: jakarta-commons/collections/src/java/org/apache/commons/collections BeanMap.java
mas 02/03/12 20:15:49
Modified: collections/src/java/org/apache/commons/collections
BeanMap.java
Log:
Removed ^M's from file because they were causing line numbers to be
reported incorrectly when trying to track down failing test cases.
Revision Changes Path
1.5 +486 -486 jakarta-commons/collections/src/java/org/apache/commons/collections/BeanMap.java
Index: BeanMap.java
===================================================================
RCS file: /home/cvs/jakarta-commons/collections/src/java/org/apache/commons/collections/BeanMap.java,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -r1.4 -r1.5
--- BeanMap.java 22 Feb 2002 07:00:30 -0000 1.4
+++ BeanMap.java 13 Mar 2002 04:15:49 -0000 1.5
@@ -1,486 +1,486 @@
-/*
- * $Header: /home/cvs/jakarta-commons/collections/src/java/org/apache/commons/collections/BeanMap.java,v 1.4 2002/02/22 07:00:30 mas Exp $
- * $Revision: 1.4 $
- * $Date: 2002/02/22 07:00:30 $
- *
- * ====================================================================
- *
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution, if
- * any, must include the following acknowlegement:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowlegement may appear in the software itself,
- * if and wherever such third-party acknowlegements normally appear.
- *
- * 4. The names "The Jakarta Project", "Commons", and "Apache Software
- * Foundation" must not be used to endorse or promote products derived
- * from this software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- *
- */
-package org.apache.commons.collections;
-
-import java.beans.BeanInfo;
-import java.beans.Introspector;
-import java.beans.IntrospectionException;
-import java.beans.PropertyDescriptor;
-import java.lang.reflect.Constructor;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.util.AbstractMap;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.Map;
-import java.util.Set;
-
-
-/** An implementation of Map for JavaBeans which uses introspection to
- * get and put properties in the bean.
- *
- * If an exception occurs during attempts to get or set a property then the
- * property is considered non existent in the Map
- *
- * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
- */
-
-public class BeanMap extends AbstractMap {
-
- private Object bean;
-
- private HashMap readMethods = new HashMap();
- private HashMap writeMethods = new HashMap();
- private HashMap types = new HashMap();
-
- public static final Object[] NULL_ARGUMENTS = {};
- public static HashMap defaultTransformers = new HashMap();
-
- static {
- defaultTransformers.put(
- Boolean.TYPE,
- new Transformer() {
- public Object transform( Object input ) {
- return Boolean.valueOf( input.toString() );
- }
- }
- );
- defaultTransformers.put(
- Character.TYPE,
- new Transformer() {
- public Object transform( Object input ) {
- return new Character( input.toString().charAt( 0 ) );
- }
- }
- );
- defaultTransformers.put(
- Byte.TYPE,
- new Transformer() {
- public Object transform( Object input ) {
- return Byte.valueOf( input.toString() );
- }
- }
- );
- defaultTransformers.put(
- Short.TYPE,
- new Transformer() {
- public Object transform( Object input ) {
- return Short.valueOf( input.toString() );
- }
- }
- );
- defaultTransformers.put(
- Integer.TYPE,
- new Transformer() {
- public Object transform( Object input ) {
- return Integer.valueOf( input.toString() );
- }
- }
- );
- defaultTransformers.put(
- Long.TYPE,
- new Transformer() {
- public Object transform( Object input ) {
- return Long.valueOf( input.toString() );
- }
- }
- );
- defaultTransformers.put(
- Float.TYPE,
- new Transformer() {
- public Object transform( Object input ) {
- return Float.valueOf( input.toString() );
- }
- }
- );
- defaultTransformers.put(
- Double.TYPE,
- new Transformer() {
- public Object transform( Object input ) {
- return Double.valueOf( input.toString() );
- }
- }
- );
- }
-
-
- // Constructors
- //-------------------------------------------------------------------------
- public BeanMap() {
- }
-
- public BeanMap(Object bean) {
- this.bean = bean;
- initialise();
- }
-
- // Map interface
- //-------------------------------------------------------------------------
-
- public Object clone() {
- Class beanClass = null;
- try {
- beanClass = bean.getClass();
- Object newBean = beanClass.newInstance();
- Map newMap = new BeanMap( newBean );
- newMap.putAll( this );
- return newMap;
- }
- catch (Exception e) {
- throw new UnsupportedOperationException( "Could not create new instance of class: " + beanClass );
- }
- }
-
- /**
- * This method reinitializes the bean map to have default values for the
- * bean's properties. This is accomplished by constructing a new instance
- * of the bean which th emap uses as its underlying data source. This
- * behavior for <code>clear()</code> differs from the Map contract in that
- * the mappings are not actually removed from the map (the mappings for a
- * BeanMap are fixed).
- **/
- public void clear() {
- Class beanClass = null;
- try {
- beanClass = bean.getClass();
- bean = beanClass.newInstance();
- }
- catch (Exception e) {
- throw new UnsupportedOperationException( "Could not create new instance of class: " + beanClass );
- }
- }
-
- public boolean containsKey(Object name) {
- Method method = getReadMethod( name );
- return method != null;
- }
-
- public boolean containsValue(Object value) {
- // use default implementation
- return super.containsValue( value );
- }
-
- public Object get(Object name) {
- if ( bean != null ) {
- Method method = getReadMethod( name );
- if ( method != null ) {
- try {
- return method.invoke( bean, NULL_ARGUMENTS );
- }
- catch ( IllegalAccessException e ) {
- logWarn( e );
- }
- catch ( IllegalArgumentException e ) {
- logWarn( e );
- }
- catch ( InvocationTargetException e ) {
- logWarn( e );
- }
- catch ( NullPointerException e ) {
- logWarn( e );
- }
- }
- }
- return null;
- }
-
- public Object put(Object name, Object value) throws IllegalArgumentException, ClassCastException {
- if ( bean != null ) {
- Object oldValue = get( name );
- Method method = getWriteMethod( name );
- if ( method == null ) {
- throw new IllegalArgumentException( "The bean of type: "+ bean.getClass().getName() + " has no property called: " + name );
- }
- try {
- Object[] arguments = createWriteMethodArguments( method, value );
- method.invoke( bean, arguments );
-
- Object newValue = get( name );
- firePropertyChange( name, oldValue, newValue );
- }
- catch ( InvocationTargetException e ) {
- logInfo( e );
- throw new IllegalArgumentException( e.getMessage() );
- }
- catch ( IllegalAccessException e ) {
- logInfo( e );
- throw new IllegalArgumentException( e.getMessage() );
- }
- return oldValue;
- }
- return null;
- }
-
- public int size() {
- return readMethods.size();
- }
-
-
- public Set keySet() {
- return readMethods.keySet();
- }
-
- public Set entrySet() {
- return readMethods.keySet();
- }
-
- public Collection values() {
- ArrayList answer = new ArrayList( readMethods.size() );
- for ( Iterator iter = valueIterator(); iter.hasNext(); ) {
- answer.add( iter.next() );
- }
- return answer;
- }
-
-
- // Helper methods
- //-------------------------------------------------------------------------
-
- public Class getType(String name) {
- return (Class) types.get( name );
- }
-
- public Iterator keyIterator() {
- return readMethods.keySet().iterator();
- }
-
- public Iterator valueIterator() {
- final Iterator iter = keyIterator();
- return new Iterator() {
- public boolean hasNext() {
- return iter.hasNext();
- }
- public Object next() {
- Object key = iter.next();
- return get( (String) key );
- }
- public void remove() {
- throw new UnsupportedOperationException( "remove() not supported for BeanMap" );
- }
- };
- }
-
- public Iterator entryIterator() {
- final Iterator iter = keyIterator();
- return new Iterator() {
- public boolean hasNext() {
- return iter.hasNext();
- }
- public Object next() {
- Object key = iter.next();
- Object value = get( (String) key );
- return new MyMapEntry( BeanMap.this, key, value );
- }
- public void remove() {
- throw new UnsupportedOperationException( "remove() not supported for BeanMap" );
- }
- };
- }
-
-
- // Properties
- //-------------------------------------------------------------------------
- public Object getBean() {
- return bean;
- }
-
- public void setBean( Object newBean ) {
- bean = newBean;
- reinitialise();
- }
-
-
- // Implementation methods
- //-------------------------------------------------------------------------
-
- protected Method getReadMethod( Object name ) {
- return (Method) readMethods.get( name );
- }
-
- protected Method getWriteMethod( Object name ) {
- return (Method) writeMethods.get( name );
- }
-
- protected void reinitialise() {
- readMethods.clear();
- writeMethods.clear();
- types.clear();
- initialise();
- }
-
- private void initialise() {
- Class beanClass = getBean().getClass();
- try {
- //BeanInfo beanInfo = Introspector.getBeanInfo( bean, null );
- BeanInfo beanInfo = Introspector.getBeanInfo( beanClass );
- PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
- if ( propertyDescriptors != null ) {
- for ( int i = 0; i < propertyDescriptors.length; i++ ) {
- PropertyDescriptor propertyDescriptor = propertyDescriptors[i];
- if ( propertyDescriptor != null ) {
- String name = propertyDescriptor.getName();
- Method readMethod = propertyDescriptor.getReadMethod();
- Method writeMethod = propertyDescriptor.getWriteMethod();
- Class aType = propertyDescriptor.getPropertyType();
-
- if ( readMethod != null ) {
- readMethods.put( name, readMethod );
- }
- if ( writeMethods != null ) {
- writeMethods.put( name, writeMethod );
- }
- types.put( name, aType );
- }
- }
- }
- }
- catch ( IntrospectionException e ) {
- logWarn( e );
- }
- }
-
- protected void firePropertyChange( Object key, Object oldValue, Object newValue ) {
- }
-
- // Implementation classes
- //-------------------------------------------------------------------------
- protected static class MyMapEntry extends DefaultMapEntry {
- private BeanMap owner;
-
- protected MyMapEntry( BeanMap owner, Object key, Object value ) {
- super( key, value );
- this.owner = owner;
- }
-
- public Object setValue(Object value) {
- Object key = getKey();
- Object oldValue = owner.get( key );
-
- owner.put( key, value );
- Object newValue = owner.get( key );
- super.setValue( newValue );
- return oldValue;
- }
- }
-
- protected Object[] createWriteMethodArguments( Method method, Object value ) throws IllegalAccessException, ClassCastException {
- try {
- if ( value != null ) {
- Class[] types = method.getParameterTypes();
- if ( types != null && types.length > 0 ) {
- Class paramType = types[0];
- if ( ! paramType.isAssignableFrom( value.getClass() ) ) {
- value = convertType( paramType, value );
- }
- }
- }
- Object[] answer = { value };
- return answer;
- }
- catch ( InvocationTargetException e ) {
- logInfo( e );
- throw new IllegalArgumentException( e.getMessage() );
- }
- catch ( InstantiationException e ) {
- logInfo( e );
- throw new IllegalArgumentException( e.getMessage() );
- }
- }
-
- protected Object convertType( Class newType, Object value )
- throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
-
- // try call constructor
- Class[] types = { value.getClass() };
- try {
- Constructor constructor = newType.getConstructor( types );
- Object[] arguments = { value };
- return constructor.newInstance( arguments );
- }
- catch ( NoSuchMethodException e ) {
- // try using the transformers
- Transformer transformer = getTypeTransformer( newType );
- if ( transformer != null ) {
- return transformer.transform( value );
- }
- return value;
- }
- }
-
- protected Transformer getTypeTransformer( Class aType ) {
- return (Transformer) defaultTransformers.get( aType );
- }
-
- protected void logInfo(Exception e) {
- // XXXX: should probably use log4j here instead...
- System.out.println( "INFO: Exception: " + e );
- }
-
- protected void logWarn(Exception e) {
- // XXXX: should probably use log4j here instead...
- System.out.println( "WARN: Exception: " + e );
- e.printStackTrace();
- }
-}
-
-
+/*
+ * $Header: /home/cvs/jakarta-commons/collections/src/java/org/apache/commons/collections/BeanMap.java,v 1.5 2002/03/13 04:15:49 mas Exp $
+ * $Revision: 1.5 $
+ * $Date: 2002/03/13 04:15:49 $
+ *
+ * ====================================================================
+ *
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. The end-user documentation included with the redistribution, if
+ * any, must include the following acknowlegement:
+ * "This product includes software developed by the
+ * Apache Software Foundation (http://www.apache.org/)."
+ * Alternately, this acknowlegement may appear in the software itself,
+ * if and wherever such third-party acknowlegements normally appear.
+ *
+ * 4. The names "The Jakarta Project", "Commons", and "Apache Software
+ * Foundation" must not be used to endorse or promote products derived
+ * from this software without prior written permission. For written
+ * permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache"
+ * nor may "Apache" appear in their names without prior written
+ * permission of the Apache Group.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation. For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+package org.apache.commons.collections;
+
+import java.beans.BeanInfo;
+import java.beans.Introspector;
+import java.beans.IntrospectionException;
+import java.beans.PropertyDescriptor;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+
+
+/** An implementation of Map for JavaBeans which uses introspection to
+ * get and put properties in the bean.
+ *
+ * If an exception occurs during attempts to get or set a property then the
+ * property is considered non existent in the Map
+ *
+ * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
+ */
+
+public class BeanMap extends AbstractMap {
+
+ private Object bean;
+
+ private HashMap readMethods = new HashMap();
+ private HashMap writeMethods = new HashMap();
+ private HashMap types = new HashMap();
+
+ public static final Object[] NULL_ARGUMENTS = {};
+ public static HashMap defaultTransformers = new HashMap();
+
+ static {
+ defaultTransformers.put(
+ Boolean.TYPE,
+ new Transformer() {
+ public Object transform( Object input ) {
+ return Boolean.valueOf( input.toString() );
+ }
+ }
+ );
+ defaultTransformers.put(
+ Character.TYPE,
+ new Transformer() {
+ public Object transform( Object input ) {
+ return new Character( input.toString().charAt( 0 ) );
+ }
+ }
+ );
+ defaultTransformers.put(
+ Byte.TYPE,
+ new Transformer() {
+ public Object transform( Object input ) {
+ return Byte.valueOf( input.toString() );
+ }
+ }
+ );
+ defaultTransformers.put(
+ Short.TYPE,
+ new Transformer() {
+ public Object transform( Object input ) {
+ return Short.valueOf( input.toString() );
+ }
+ }
+ );
+ defaultTransformers.put(
+ Integer.TYPE,
+ new Transformer() {
+ public Object transform( Object input ) {
+ return Integer.valueOf( input.toString() );
+ }
+ }
+ );
+ defaultTransformers.put(
+ Long.TYPE,
+ new Transformer() {
+ public Object transform( Object input ) {
+ return Long.valueOf( input.toString() );
+ }
+ }
+ );
+ defaultTransformers.put(
+ Float.TYPE,
+ new Transformer() {
+ public Object transform( Object input ) {
+ return Float.valueOf( input.toString() );
+ }
+ }
+ );
+ defaultTransformers.put(
+ Double.TYPE,
+ new Transformer() {
+ public Object transform( Object input ) {
+ return Double.valueOf( input.toString() );
+ }
+ }
+ );
+ }
+
+
+ // Constructors
+ //-------------------------------------------------------------------------
+ public BeanMap() {
+ }
+
+ public BeanMap(Object bean) {
+ this.bean = bean;
+ initialise();
+ }
+
+ // Map interface
+ //-------------------------------------------------------------------------
+
+ public Object clone() {
+ Class beanClass = null;
+ try {
+ beanClass = bean.getClass();
+ Object newBean = beanClass.newInstance();
+ Map newMap = new BeanMap( newBean );
+ newMap.putAll( this );
+ return newMap;
+ }
+ catch (Exception e) {
+ throw new UnsupportedOperationException( "Could not create new instance of class: " + beanClass );
+ }
+ }
+
+ /**
+ * This method reinitializes the bean map to have default values for the
+ * bean's properties. This is accomplished by constructing a new instance
+ * of the bean which th emap uses as its underlying data source. This
+ * behavior for <code>clear()</code> differs from the Map contract in that
+ * the mappings are not actually removed from the map (the mappings for a
+ * BeanMap are fixed).
+ **/
+ public void clear() {
+ Class beanClass = null;
+ try {
+ beanClass = bean.getClass();
+ bean = beanClass.newInstance();
+ }
+ catch (Exception e) {
+ throw new UnsupportedOperationException( "Could not create new instance of class: " + beanClass );
+ }
+ }
+
+ public boolean containsKey(Object name) {
+ Method method = getReadMethod( name );
+ return method != null;
+ }
+
+ public boolean containsValue(Object value) {
+ // use default implementation
+ return super.containsValue( value );
+ }
+
+ public Object get(Object name) {
+ if ( bean != null ) {
+ Method method = getReadMethod( name );
+ if ( method != null ) {
+ try {
+ return method.invoke( bean, NULL_ARGUMENTS );
+ }
+ catch ( IllegalAccessException e ) {
+ logWarn( e );
+ }
+ catch ( IllegalArgumentException e ) {
+ logWarn( e );
+ }
+ catch ( InvocationTargetException e ) {
+ logWarn( e );
+ }
+ catch ( NullPointerException e ) {
+ logWarn( e );
+ }
+ }
+ }
+ return null;
+ }
+
+ public Object put(Object name, Object value) throws IllegalArgumentException, ClassCastException {
+ if ( bean != null ) {
+ Object oldValue = get( name );
+ Method method = getWriteMethod( name );
+ if ( method == null ) {
+ throw new IllegalArgumentException( "The bean of type: "+ bean.getClass().getName() + " has no property called: " + name );
+ }
+ try {
+ Object[] arguments = createWriteMethodArguments( method, value );
+ method.invoke( bean, arguments );
+
+ Object newValue = get( name );
+ firePropertyChange( name, oldValue, newValue );
+ }
+ catch ( InvocationTargetException e ) {
+ logInfo( e );
+ throw new IllegalArgumentException( e.getMessage() );
+ }
+ catch ( IllegalAccessException e ) {
+ logInfo( e );
+ throw new IllegalArgumentException( e.getMessage() );
+ }
+ return oldValue;
+ }
+ return null;
+ }
+
+ public int size() {
+ return readMethods.size();
+ }
+
+
+ public Set keySet() {
+ return readMethods.keySet();
+ }
+
+ public Set entrySet() {
+ return readMethods.keySet();
+ }
+
+ public Collection values() {
+ ArrayList answer = new ArrayList( readMethods.size() );
+ for ( Iterator iter = valueIterator(); iter.hasNext(); ) {
+ answer.add( iter.next() );
+ }
+ return answer;
+ }
+
+
+ // Helper methods
+ //-------------------------------------------------------------------------
+
+ public Class getType(String name) {
+ return (Class) types.get( name );
+ }
+
+ public Iterator keyIterator() {
+ return readMethods.keySet().iterator();
+ }
+
+ public Iterator valueIterator() {
+ final Iterator iter = keyIterator();
+ return new Iterator() {
+ public boolean hasNext() {
+ return iter.hasNext();
+ }
+ public Object next() {
+ Object key = iter.next();
+ return get( (String) key );
+ }
+ public void remove() {
+ throw new UnsupportedOperationException( "remove() not supported for BeanMap" );
+ }
+ };
+ }
+
+ public Iterator entryIterator() {
+ final Iterator iter = keyIterator();
+ return new Iterator() {
+ public boolean hasNext() {
+ return iter.hasNext();
+ }
+ public Object next() {
+ Object key = iter.next();
+ Object value = get( (String) key );
+ return new MyMapEntry( BeanMap.this, key, value );
+ }
+ public void remove() {
+ throw new UnsupportedOperationException( "remove() not supported for BeanMap" );
+ }
+ };
+ }
+
+
+ // Properties
+ //-------------------------------------------------------------------------
+ public Object getBean() {
+ return bean;
+ }
+
+ public void setBean( Object newBean ) {
+ bean = newBean;
+ reinitialise();
+ }
+
+
+ // Implementation methods
+ //-------------------------------------------------------------------------
+
+ protected Method getReadMethod( Object name ) {
+ return (Method) readMethods.get( name );
+ }
+
+ protected Method getWriteMethod( Object name ) {
+ return (Method) writeMethods.get( name );
+ }
+
+ protected void reinitialise() {
+ readMethods.clear();
+ writeMethods.clear();
+ types.clear();
+ initialise();
+ }
+
+ private void initialise() {
+ Class beanClass = getBean().getClass();
+ try {
+ //BeanInfo beanInfo = Introspector.getBeanInfo( bean, null );
+ BeanInfo beanInfo = Introspector.getBeanInfo( beanClass );
+ PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
+ if ( propertyDescriptors != null ) {
+ for ( int i = 0; i < propertyDescriptors.length; i++ ) {
+ PropertyDescriptor propertyDescriptor = propertyDescriptors[i];
+ if ( propertyDescriptor != null ) {
+ String name = propertyDescriptor.getName();
+ Method readMethod = propertyDescriptor.getReadMethod();
+ Method writeMethod = propertyDescriptor.getWriteMethod();
+ Class aType = propertyDescriptor.getPropertyType();
+
+ if ( readMethod != null ) {
+ readMethods.put( name, readMethod );
+ }
+ if ( writeMethods != null ) {
+ writeMethods.put( name, writeMethod );
+ }
+ types.put( name, aType );
+ }
+ }
+ }
+ }
+ catch ( IntrospectionException e ) {
+ logWarn( e );
+ }
+ }
+
+ protected void firePropertyChange( Object key, Object oldValue, Object newValue ) {
+ }
+
+ // Implementation classes
+ //-------------------------------------------------------------------------
+ protected static class MyMapEntry extends DefaultMapEntry {
+ private BeanMap owner;
+
+ protected MyMapEntry( BeanMap owner, Object key, Object value ) {
+ super( key, value );
+ this.owner = owner;
+ }
+
+ public Object setValue(Object value) {
+ Object key = getKey();
+ Object oldValue = owner.get( key );
+
+ owner.put( key, value );
+ Object newValue = owner.get( key );
+ super.setValue( newValue );
+ return oldValue;
+ }
+ }
+
+ protected Object[] createWriteMethodArguments( Method method, Object value ) throws IllegalAccessException, ClassCastException {
+ try {
+ if ( value != null ) {
+ Class[] types = method.getParameterTypes();
+ if ( types != null && types.length > 0 ) {
+ Class paramType = types[0];
+ if ( ! paramType.isAssignableFrom( value.getClass() ) ) {
+ value = convertType( paramType, value );
+ }
+ }
+ }
+ Object[] answer = { value };
+ return answer;
+ }
+ catch ( InvocationTargetException e ) {
+ logInfo( e );
+ throw new IllegalArgumentException( e.getMessage() );
+ }
+ catch ( InstantiationException e ) {
+ logInfo( e );
+ throw new IllegalArgumentException( e.getMessage() );
+ }
+ }
+
+ protected Object convertType( Class newType, Object value )
+ throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
+
+ // try call constructor
+ Class[] types = { value.getClass() };
+ try {
+ Constructor constructor = newType.getConstructor( types );
+ Object[] arguments = { value };
+ return constructor.newInstance( arguments );
+ }
+ catch ( NoSuchMethodException e ) {
+ // try using the transformers
+ Transformer transformer = getTypeTransformer( newType );
+ if ( transformer != null ) {
+ return transformer.transform( value );
+ }
+ return value;
+ }
+ }
+
+ protected Transformer getTypeTransformer( Class aType ) {
+ return (Transformer) defaultTransformers.get( aType );
+ }
+
+ protected void logInfo(Exception e) {
+ // XXXX: should probably use log4j here instead...
+ System.out.println( "INFO: Exception: " + e );
+ }
+
+ protected void logWarn(Exception e) {
+ // XXXX: should probably use log4j here instead...
+ System.out.println( "WARN: Exception: " + e );
+ e.printStackTrace();
+ }
+}
+
+
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