/*
* Copyright (C) 2011 Red Hat, Inc. and/or its affiliates.
*
* 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 org.jboss.errai.codegen;
import java.util.Arrays;
import org.jboss.errai.codegen.exception.InvalidExpressionException;
import org.jboss.errai.codegen.meta.MetaClass;
import org.jboss.errai.codegen.meta.MetaClassFactory;
/**
* @author Mike Brock <cbrock@redhat.com>
* @author Christian Sadilek <csadilek@redhat.com>
*/
public class OperatorImpl implements Operator {
private final String canonicalString;
private final int operatorPrecedence;
private final MetaClass[] constraints;
OperatorImpl(String canonicalString, int operatorPrecedence, Class<?>... constraints) {
this.canonicalString = canonicalString;
this.operatorPrecedence = operatorPrecedence;
this.constraints = MetaClassFactory.fromClassArray(constraints);
}
@Override
public String getCanonicalString() {
return canonicalString;
}
@Override
public int getOperatorPrecedence() {
return operatorPrecedence;
}
@Override
public boolean isHigherPrecedenceThan(Operator operator) {
return operator.getOperatorPrecedence() < getOperatorPrecedence();
}
@Override
public boolean isEqualOrHigherPrecedenceThan(Operator operator) {
return operator.getOperatorPrecedence() <= getOperatorPrecedence();
}
@Override
public void assertCanBeApplied(MetaClass clazz) {
if (!canBeApplied(clazz)) {
throw new InvalidExpressionException("Not a valid type for operator '" +
canonicalString + "': " + clazz.getFullyQualifiedName());
}
}
@Override
public boolean canBeApplied(MetaClass clazz) {
if (constraints.length == 0) return true;
return Arrays.stream(constraints).anyMatch(mc -> mc.asBoxed().isAssignableFrom(clazz.asBoxed()));
}
}