//--------------------------------------------------------------------------
// 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 ognl;
import ognl.enhance.
UnsupportedCompilationException;
/**
* @author Luke Blanshard (blanshlu@netscape.net)
* @author Drew Davidson (drew@ognl.org)
*/
class
ASTTest extends
ExpressionNode
{
public
ASTTest(int
id) {
super(
id);
}
public
ASTTest(
OgnlParser p, int
id) {
super(
p,
id);
}
protected
Object getValueBody(
OgnlContext context,
Object source ) throws
OgnlException
{
Object test =
_children[0].
getValue(
context,
source );
int
branch =
OgnlOps.
booleanValue(
test)? 1 : 2;
return
_children[
branch].
getValue(
context,
source );
}
protected void
setValueBody(
OgnlContext context,
Object target,
Object value ) throws
OgnlException
{
Object test =
_children[0].
getValue(
context,
target );
int
branch =
OgnlOps.
booleanValue(
test)? 1 : 2;
_children[
branch].
setValue(
context,
target,
value );
}
public
String getExpressionOperator(int
index)
{
return (
index == 1) ? "?" : ":";
}
public
String toGetSourceString(
OgnlContext context,
Object target)
{
if (
target == null)
throw new
UnsupportedCompilationException("evaluation resulted in null expression.");
if (
_children.length != 3)
throw new
UnsupportedCompilationException("Can only compile test expressions with two children." +
_children.length);
String result = "";
try {
String first =
OgnlRuntime.
getChildSource(
context,
target,
_children[0]);
if (!
OgnlRuntime.
isBoolean(
first) && !
context.
getCurrentType().
isPrimitive())
first =
OgnlRuntime.
getCompiler().
createLocalReference(
context,
first,
context.
getCurrentType());
if (
ExpressionNode.class.
isInstance(
_children[0]))
{
first = "(" +
first + ")";
}
String second =
OgnlRuntime.
getChildSource(
context,
target,
_children[1]);
Class secondType =
context.
getCurrentType();
if (!
OgnlRuntime.
isBoolean(
second) && !
context.
getCurrentType().
isPrimitive())
second =
OgnlRuntime.
getCompiler().
createLocalReference(
context,
second,
context.
getCurrentType());
if (
ExpressionNode.class.
isInstance(
_children[1]))
{
second = "(" +
second + ")";
}
String third =
OgnlRuntime.
getChildSource(
context,
target,
_children[2]);
Class thirdType =
context.
getCurrentType();
if (!
OgnlRuntime.
isBoolean(
third) && !
context.
getCurrentType().
isPrimitive())
third =
OgnlRuntime.
getCompiler().
createLocalReference(
context,
third,
context.
getCurrentType());
if (
ExpressionNode.class.
isInstance(
_children[2]))
{
third = "(" +
third + ")";
}
boolean
mismatched = (
secondType.
isPrimitive() && !
thirdType.
isPrimitive())
|| (!
secondType.
isPrimitive() &&
thirdType.
isPrimitive()) ? true : false;
result += "ognl.OgnlOps.booleanValue(" +
first + ")";
result += " ? ";
result += (
mismatched ? " ($w) " : "") +
second;
result += " : ";
result += (
mismatched ? " ($w) " : "") +
third;
context.
setCurrentObject(
target);
context.
setCurrentType(
mismatched ?
Object.class :
secondType);
return
result;
} catch (
NullPointerException e) {
// expected to happen in some instances
throw new
UnsupportedCompilationException("evaluation resulted in null expression.");
} catch (
Throwable t)
{
throw
OgnlOps.
castToRuntime(
t);
}
}
}