core/runtime/src/main/java/org/apache/polygene/runtime/composite/ValueConstraintsModel.java

/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.apache.polygene.runtime.composite;

import java.util.Collections;
import java.util.List;
import org.apache.polygene.api.util.HierarchicalVisitor;
import org.apache.polygene.api.util.VisitableHierarchy;

public final class ValueConstraintsModel
    implements VisitableHierarchy<Object, Object>
{
    private final List<AbstractConstraintModel> constraintModels;
    private String name;
    private boolean optional;

    public ValueConstraintsModel( List<AbstractConstraintModel> constraintModels, String name, boolean optional )
    {
        this.constraintModels = constraintModels;
        this.name = name;
        this.optional = optional;
    }

    public ValueConstraintsInstance newInstance()
    {
        List<AbstractConstraintModel> models = isConstrained() ? this.constraintModels : Collections.emptyList();
        return new ValueConstraintsInstance( models, name, optional );
    }

    public boolean isConstrained()
    {
        return !constraintModels.isEmpty() || !optional;
    }

    @Override
    public <ThrowableType extends Throwable> boolean accept( HierarchicalVisitor<? super Object, ? super Object, ThrowableType> modelVisitor )
        throws ThrowableType
    {
        for( AbstractConstraintModel constraintModel : constraintModels )
        {
            if( constraintModel.accept( modelVisitor ) )
            {
                return false;
            }
        }
        return true;
    }
}