//--------------------------------------------------------------------------
// 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 ariba.util.expr;
import ariba.util.fieldtype.TypeInfo;
import ariba.util.fieldtype.MethodInfo;
/**
* @author Luke Blanshard (blanshlu@netscape.net)
* @author Drew Davidson (drew@ognl.org)
*/
class ASTMethod extends SimpleNode implements Symbol
{
private String methodName;
public ASTMethod(int id) {
super(id);
}
public ASTMethod(ExprParser p, int id) {
super(p, id);
}
/** Called from parser action. */
void setMethodName( String methodName ) {
this.methodName = methodName;
}
/**
Returns the method name that this node will call.
*/
public String getMethodName()
{
return methodName;
}
public String getName ()
{
// do not use getMethodName() since we want the parameter list to
// be part of the symbol name.
return toString();
}
protected Object getValueBody( ExprContext context, Object source ) throws ExprException
{
SymbolTable table = context.getSymbolTable();
SemanticRecord record = (table != null ?
(SemanticRecord)table.getSymbolRecord(this) : null);
MethodInfo methodInfo = (record != null?
(MethodInfo)record.getPropertyInfo() : null);
boolean isStatic = (methodInfo != null ? methodInfo.isStatic() : false);
// Wrap the source as well as to provide proper evaluation context
// for method invocation.
source = ExprRuntime.convert(source);
Object value;
if (!isStatic) {
value = _getValueBody(context, source);
}
else {
String typeName = methodInfo.getParentType().getName();
Object[] args = ExprRuntime.getObjectArrayPool().create(jjtGetNumChildren());
Object root = context.getRoot();
try {
for ( int i=0, icount = args.length; i < icount; ++i ) {
args[i] = children[i].getValue(context, root);
}
value = ExprRuntime.callStaticMethod( context, typeName, methodName, args );
} finally {
ExprRuntime.getObjectArrayPool().recycle(args);
}
}
return ExprRuntime.convert(value);
}
protected Object _getValueBody( ExprContext context, Object source ) throws ExprException
{
Object[] args = ExprRuntime.getObjectArrayPool().create(jjtGetNumChildren());
try {
Object result,
root = context.getRoot();
for ( int i = 0, icount = args.length; i < icount; ++i ) {
args[i] = children[i].getValue(context, root);
}
result = ExprRuntime.callMethod( context, source, methodName, null, args);
if (result == null) {
NullHandler nh = ExprRuntime.getNullHandler(ExprRuntime.getTargetClass(source));
result = nh.nullMethodResult(context, source, methodName, args);
}
return result;
} finally {
ExprRuntime.getObjectArrayPool().recycle(args);
}
}
public String toString()
{
String result = methodName;
result = result + "(";
if ((children != null) && (children.length > 0)) {
for (int i = 0; i < children.length; i++) {
if (i > 0) {
result = result + ", ";
}
result = result + children[i];
}
}
result = result + ")";
return result;
}
public void accept (ASTNodeVisitor visitor)
{
// visitor will have to navigate the child.
visitor.visit(this);
}
}