/*
 * 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;

import java.nio.ByteBuffer;
import java.util.*;

import org.apache.cassandra.db.marshal.CompositeType;
import org.apache.cassandra.db.marshal.UserType;
import org.apache.cassandra.db.marshal.UTF8Type;
import org.apache.cassandra.exceptions.InvalidRequestException;
import org.apache.cassandra.utils.FBUtilities;

/**
 * Static helper methods and classes for user types.
 */
public abstract class UserTypes
{
    private UserTypes() {}

    public static ColumnSpecification fieldSpecOf(ColumnSpecification column, int field)
    {
        return new ColumnSpecification(column.ksName,
                                       column.cfName,
                                       new ColumnIdentifier(column.name + "." + field, true),
                                       ((UserType)column.type).fieldTypes.get(field));
    }

    public static class Literal implements Term.Raw
    {
        public final Map<ColumnIdentifier, Term.Raw> entries;

        public Literal(Map<ColumnIdentifier, Term.Raw> entries)
        {
            this.entries = entries;
        }

        public Term prepare(String keyspace, ColumnSpecification receiver) throws InvalidRequestException
        {
            validateAssignableTo(keyspace, receiver);

            UserType ut = (UserType)receiver.type;
            boolean allTerminal = true;
            List<Term> values = new ArrayList<>(entries.size());
            for (int i = 0; i < ut.fieldTypes.size(); i++)
            {
                ColumnIdentifier field = new ColumnIdentifier(ut.fieldNames.get(i), UTF8Type.instance);
                Term value = entries.get(field).prepare(keyspace, fieldSpecOf(receiver, i));

                if (value instanceof Term.NonTerminal)
                    allTerminal = false;

                values.add(value);
            }
            DelayedValue value = new DelayedValue(((UserType)receiver.type), values);
            return allTerminal ? value.bind(QueryOptions.DEFAULT) : value;
        }

        private void validateAssignableTo(String keyspace, ColumnSpecification receiver) throws InvalidRequestException
        {
            if (!(receiver.type instanceof UserType))
                throw new InvalidRequestException(String.format("Invalid user type literal for %s of type %s", receiver, receiver.type.asCQL3Type()));

            UserType ut = (UserType)receiver.type;
            for (int i = 0; i < ut.fieldTypes.size(); i++)
            {
                ColumnIdentifier field = new ColumnIdentifier(ut.fieldNames.get(i), UTF8Type.instance);
                Term.Raw value = entries.get(field);
                if (value == null)
                    throw new InvalidRequestException(String.format("Invalid user type literal for %s: missing field %s", receiver, field));

                ColumnSpecification fieldSpec = fieldSpecOf(receiver, i);
                if (!value.isAssignableTo(keyspace, fieldSpec))
                    throw new InvalidRequestException(String.format("Invalid user type literal for %s: field %s is not of type %s", receiver, field, fieldSpec.type.asCQL3Type()));
            }
        }

        public boolean isAssignableTo(String keyspace, ColumnSpecification receiver)
        {
            try
            {
                validateAssignableTo(keyspace, receiver);
                return true;
            }
            catch (InvalidRequestException e)
            {
                return false;
            }
        }

        @Override
        public String toString()
        {
            StringBuilder sb = new StringBuilder();
            sb.append("{");
            Iterator<Map.Entry<ColumnIdentifier, Term.Raw>> iter = entries.entrySet().iterator();
            while (iter.hasNext())
            {
                Map.Entry<ColumnIdentifier, Term.Raw> entry = iter.next();
                sb.append(entry.getKey()).append(":").append(entry.getValue());
                if (iter.hasNext())
                    sb.append(", ");
            }
            sb.append("}");
            return sb.toString();
        }
    }

    // Same purpose than Lists.DelayedValue, except we do handle bind marker in that case
    public static class DelayedValue extends Term.NonTerminal
    {
        private final UserType type;
        private final List<Term> values;

        public DelayedValue(UserType type, List<Term> values)
        {
            this.type = type;
            this.values = values;
        }

        public boolean containsBindMarker()
        {
            for (Term t : values)
                if (t.containsBindMarker())
                    return true;
            return false;
        }

        public void collectMarkerSpecification(VariableSpecifications boundNames)
        {
            for (int i = 0; i < type.fieldTypes.size(); i++)
                values.get(i).collectMarkerSpecification(boundNames);
        }

        private ByteBuffer[] bindInternal(QueryOptions options) throws InvalidRequestException
        {
            // Inside UDT values, we must force the serialization of collections whatever the protocol version is in
            // use since we're going to store directly that serialized value.
            options = options.withProtocolVersion(3);

            ByteBuffer[] buffers = new ByteBuffer[values.size()];
            for (int i = 0; i < type.fieldTypes.size(); i++)
            {
                ByteBuffer buffer = values.get(i).bindAndGet(options);
                if (buffer == null)
                    throw new InvalidRequestException("null is not supported inside user type literals");
                if (buffer.remaining() > FBUtilities.MAX_UNSIGNED_SHORT)
                    throw new InvalidRequestException(String.format("Value for field %s is too long. User type fields are limited to %d bytes but %d bytes provided",
                                                                    UTF8Type.instance.getString(type.fieldNames.get(i)),
                                                                    FBUtilities.MAX_UNSIGNED_SHORT,
                                                                    buffer.remaining()));

                buffers[i] = buffer;
            }
            return buffers;
        }

        public Constants.Value bind(QueryOptions options) throws InvalidRequestException
        {
            return new Constants.Value(bindAndGet(options));
        }

        @Override
        public ByteBuffer bindAndGet(QueryOptions options) throws InvalidRequestException
        {
            return UserType.buildValue(bindInternal(options));
        }
    }
}

@@ -1103,55 +1103,8 @@
 ion;
-%0Aimport org.apache.cassandra.utils.FBUtilities;
 %0A%0A/*
@@ -6392,558 +6392,8 @@
 s%22);
-%0A                if (buffer.remaining() %3E FBUtilities.MAX_UNSIGNED_SHORT)%0A                    throw new InvalidRequestException(String.format(%22Value for field %25s is too long. User type fields are limited to %25d bytes but %25d bytes provided%22,%0A                                                                    UTF8Type.instance.getString(type.fieldNames.get(i)),%0A                                                                    FBUtilities.MAX_UNSIGNED_SHORT,%0A                                                                    buffer.remaining()));
 %0A%0A  

Remove bogus validation post-6855