/*
* Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package freemarker.ext.beans;
import freemarker.core._DelayedOrdinal;
/**
* Describes a failed member lookup. Instances of this must not be cached as instances may store the actual argument
* values.
*/
final class EmptyMemberAndArguments extends MaybeEmptyMemberAndArguments {
static final EmptyMemberAndArguments WRONG_NUMBER_OF_ARGUMENTS
= new EmptyMemberAndArguments(
"No compatible overloaded variation was found; wrong number of arguments.", true, null);
private final Object errorDescription;
private final boolean numberOfArgumentsWrong;
private final Object[] unwrappedArguments;
private EmptyMemberAndArguments(
Object errorDescription, boolean numberOfArgumentsWrong, Object[] unwrappedArguments) {
this.errorDescription = errorDescription;
this.numberOfArgumentsWrong = numberOfArgumentsWrong;
this.unwrappedArguments = unwrappedArguments;
}
static EmptyMemberAndArguments noCompatibleOverload(int unwrappableIndex) {
return new EmptyMemberAndArguments(
new Object[] { "No compatible overloaded variation was found; can't convert (unwrap) the ",
new _DelayedOrdinal(new Integer(unwrappableIndex)), " argument to the desired Java type." },
false,
null);
}
static EmptyMemberAndArguments noCompatibleOverload(Object[] unwrappedArgs) {
return new EmptyMemberAndArguments(
"No compatible overloaded variation was found; declared parameter types and argument value types mismatch.",
false,
unwrappedArgs);
}
static EmptyMemberAndArguments ambiguous(Object[] unwrappedArgs) {
return new EmptyMemberAndArguments(
"Multiple compatible overloaded variations were found with the same priority.",
false,
unwrappedArgs);
}
static MaybeEmptyMemberAndArguments from(
EmptyCallableMemberDescriptor emtpyMemberDesc, Object[] unwrappedArgs) {
if (emtpyMemberDesc == EmptyCallableMemberDescriptor.NO_SUCH_METHOD) {
return noCompatibleOverload(unwrappedArgs);
} else if (emtpyMemberDesc == EmptyCallableMemberDescriptor.AMBIGUOUS_METHOD) {
return ambiguous(unwrappedArgs);
} else {
throw new IllegalArgumentException("Unrecognized constant: " + emtpyMemberDesc);
}
}
Object getErrorDescription() {
return errorDescription;
}
/**
* @return {@code null} if the error has occurred earlier than the full argument list was unwrapped.
*/
Object[] getUnwrappedArguments() {
return unwrappedArguments;
}
public boolean isNumberOfArgumentsWrong() {
return numberOfArgumentsWrong;
}
}