scylladb/cql3/restrictions/ForwardingPrimaryKeyRestrictions.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.cassandra.cql3.restrictions;

import java.nio.ByteBuffer;
import java.util.Collection;
import java.util.List;

import org.apache.cassandra.config.ColumnDefinition;
import org.apache.cassandra.cql3.QueryOptions;
import org.apache.cassandra.cql3.statements.Bound;
import org.apache.cassandra.db.IndexExpression;
import org.apache.cassandra.db.composites.Composite;
import org.apache.cassandra.db.index.SecondaryIndexManager;
import org.apache.cassandra.exceptions.InvalidRequestException;

/**
 * A <code>PrimaryKeyRestrictions</code> which forwards all its method calls to another 
 * <code>PrimaryKeyRestrictions</code>. Subclasses should override one or more methods to modify the behavior 
 * of the backing <code>PrimaryKeyRestrictions</code> as desired per the decorator pattern. 
 */
abstract class ForwardingPrimaryKeyRestrictions implements PrimaryKeyRestrictions
{
    /**
     * Returns the backing delegate instance that methods are forwarded to.
     * @return the backing delegate instance that methods are forwarded to.
     */
    protected abstract PrimaryKeyRestrictions getDelegate();

    @Override
    public boolean usesFunction(String ksName, String functionName)
    {
        return getDelegate().usesFunction(ksName, functionName);
    }

    @Override
    public Collection<ColumnDefinition> getColumnDefs()
    {
        return getDelegate().getColumnDefs();
    }

    @Override
    public PrimaryKeyRestrictions mergeWith(Restriction restriction) throws InvalidRequestException
    {
        return getDelegate().mergeWith(restriction);
    }

    @Override
    public boolean hasSupportingIndex(SecondaryIndexManager secondaryIndexManager)
    {
        return getDelegate().hasSupportingIndex(secondaryIndexManager);
    }

    @Override
    public List<ByteBuffer> values(QueryOptions options) throws InvalidRequestException
    {
        return getDelegate().values(options);
    }

    @Override
    public List<Composite> valuesAsComposites(QueryOptions options) throws InvalidRequestException
    {
        return getDelegate().valuesAsComposites(options);
    }

    @Override
    public List<ByteBuffer> bounds(Bound bound, QueryOptions options) throws InvalidRequestException
    {
        return getDelegate().bounds(bound, options);
    }

    @Override
    public List<Composite> boundsAsComposites(Bound bound, QueryOptions options) throws InvalidRequestException
    {
        return getDelegate().boundsAsComposites(bound, options);
    }

    @Override
    public boolean isInclusive(Bound bound)
    {
        return getDelegate().isInclusive(bound.reverse());
    }

    @Override
    public boolean isEmpty()
    {
        return getDelegate().isEmpty();
    }

    @Override
    public int size()
    {
        return getDelegate().size();
    }

    @Override
    public boolean isOnToken()
    {
        return getDelegate().isOnToken();
    }

    @Override
    public boolean isSlice()
    {
        return getDelegate().isSlice();
    }

    @Override
    public boolean isEQ()
    {
        return getDelegate().isEQ();
    }

    @Override
    public boolean isIN()
    {
        return getDelegate().isIN();
    }

    @Override
    public boolean isContains()
    {
        return getDelegate().isContains();
    }

    @Override
    public boolean isMultiColumn()
    {
        return getDelegate().isMultiColumn();
    }

    @Override
    public boolean hasBound(Bound b)
    {
        return getDelegate().hasBound(b);
    }

    @Override
    public void addIndexExpressionTo(List<IndexExpression> expressions,
                                     QueryOptions options) throws InvalidRequestException
    {
        getDelegate().addIndexExpressionTo(expressions, options);
    }
}