/* * 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())); } }