/*
 * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.yangtools.yang.data.impl.schema;

import com.google.common.base.Preconditions;
import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
import org.opendaylight.yangtools.yang.data.api.schema.LeafSetNode;
import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.ListNodeBuilder;
import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableLeafSetNodeBuilder;
import org.opendaylight.yangtools.yang.data.util.LeafsetEntryInterner;
import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;

final class InterningLeafSetNodeBuilder<T> extends ImmutableLeafSetNodeBuilder<T> {
    private final LeafsetEntryInterner interner;

    private InterningLeafSetNodeBuilder(final LeafsetEntryInterner interner) {
        this.interner = Preconditions.checkNotNull(interner);
    }

    private InterningLeafSetNodeBuilder(final LeafsetEntryInterner interner, final int sizeHint) {
        super(sizeHint);
        this.interner = Preconditions.checkNotNull(interner);
    }

    private static LeafsetEntryInterner getInterner(final DataSchemaNode schema) {
        return schema instanceof LeafSetNode ? LeafsetEntryInterner.forSchema((LeafListSchemaNode) schema) : null;
    }

    static <T> ListNodeBuilder<T, LeafSetEntryNode<T>> create(final DataSchemaNode schema) {
        final LeafsetEntryInterner interner = getInterner(schema);
        if (interner != null) {
            return new InterningLeafSetNodeBuilder<>(interner);
        }

        return ImmutableLeafSetNodeBuilder.create();
    }

    static <T> ListNodeBuilder<T, LeafSetEntryNode<T>> create(final DataSchemaNode schema, final int sizeHint) {
        final LeafsetEntryInterner interner = getInterner(schema);
        if (interner != null) {
            return new InterningLeafSetNodeBuilder<>(interner, sizeHint);
        }

        return ImmutableLeafSetNodeBuilder.create(sizeHint);
    }

    @Override
    public ListNodeBuilder<T, LeafSetEntryNode<T>> withChild(final LeafSetEntryNode<T> child) {
        return super.withChild(interner.intern(child));
    }
}