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//--------------------------------------------------------------------------
// Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 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.
// Neither the name of the Drew Davidson nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS 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
// COPYRIGHT OWNER OR 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.
//--------------------------------------------------------------------------
package org.apache.ibatis.ognl;
import java.beans.IntrospectionException;
import java.util.Map;
/**
* Implementation of PropertyAccessor that uses reflection on the target object's class to
* find a field or a pair of set/get methods with the given property name.
*
* @author Luke Blanshard ([email protected])
* @author Drew Davidson ([email protected])
*/
public class ObjectPropertyAccessor implements PropertyAccessor {
/**
* Returns OgnlRuntime.NotFound if the property does not exist.
*/
public Object getPossibleProperty(Map context, Object target, String name) throws OgnlException {
Object result;
OgnlContext ognlContext = (OgnlContext) context;
try {
if ((result = OgnlRuntime.getMethodValue(ognlContext, target, name, true)) == OgnlRuntime.NotFound) {
result = OgnlRuntime.getFieldValue(ognlContext, target, name, true);
}
} catch (IntrospectionException ex) {
throw new OgnlException(name, ex);
} catch (OgnlException ex) {
throw ex;
} catch (Exception ex) {
throw new OgnlException(name, ex);
}
return result;
}
/**
* Returns OgnlRuntime.NotFound if the property does not exist.
*/
public Object setPossibleProperty(Map context, Object target, String name, Object value) throws OgnlException {
Object result = null;
OgnlContext ognlContext = (OgnlContext) context;
try {
if (!OgnlRuntime.setMethodValue(ognlContext, target, name, value, true)) {
result = OgnlRuntime.setFieldValue(ognlContext, target, name, value) ? null : OgnlRuntime.NotFound;
}
} catch (IntrospectionException ex) {
throw new OgnlException(name, ex);
} catch (OgnlException ex) {
throw ex;
} catch (Exception ex) {
throw new OgnlException(name, ex);
}
return result;
}
public boolean hasGetProperty(OgnlContext context, Object target, Object oname) throws OgnlException {
try {
return OgnlRuntime.hasGetProperty(context, target, oname);
} catch (IntrospectionException ex) {
throw new OgnlException("checking if " + target + " has gettable property " + oname, ex);
}
}
public boolean hasGetProperty(Map context, Object target, Object oname) throws OgnlException {
return hasGetProperty((OgnlContext) context, target, oname);
}
public boolean hasSetProperty(OgnlContext context, Object target, Object oname) throws OgnlException {
try {
return OgnlRuntime.hasSetProperty(context, target, oname);
} catch (IntrospectionException ex) {
throw new OgnlException("checking if " + target + " has settable property " + oname, ex);
}
}
public boolean hasSetProperty(Map context, Object target, Object oname) throws OgnlException {
return hasSetProperty((OgnlContext) context, target, oname);
}
public Object getProperty(Map context, Object target, Object oname) throws OgnlException {
Object result = null;
String name = oname.toString();
if ((result = getPossibleProperty(context, target, name)) == OgnlRuntime.NotFound) {
throw new NoSuchPropertyException(target, name);
}
return result;
}
public void setProperty(Map context, Object target, Object oname, Object value) throws OgnlException {
String name = oname.toString();
if (setPossibleProperty(context, target, name, value) == OgnlRuntime.NotFound) {
throw new NoSuchPropertyException(target, name);
}
}
}
