<commit_before>/*
 * 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 io.prestosql.spi.security;

import java.security.Principal;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Optional;
import java.util.Set;

import static java.util.Collections.emptyMap;
import static java.util.Collections.emptySet;
import static java.util.Collections.unmodifiableSet;
import static java.util.Objects.requireNonNull;

public class ConnectorIdentity
{
    private final String user;
    private final Set<String> groups;
    private final Optional<Principal> principal;
    private final Optional<SelectedRole> role;
    private final Map<String, String> extraCredentials;

    @Deprecated
    public ConnectorIdentity(String user, Optional<Principal> principal, Optional<SelectedRole> role)
    {
        this(user, principal, role, emptyMap());
    }

    @Deprecated
    public ConnectorIdentity(String user, Optional<Principal> principal, Optional<SelectedRole> role, Map<String, String> extraCredentials)
    {
        this(user, emptySet(), principal, role, extraCredentials);
    }

    private ConnectorIdentity(
            String user,
            Set<String> groups,
            Optional<Principal> principal,
            Optional<SelectedRole> role,
            Map<String, String> extraCredentials)
    {
        this.user = user;
        this.groups = groups;
        this.principal = principal;
        this.role = role;
        this.extraCredentials = extraCredentials;
    }

    public String getUser()
    {
        return user;
    }

    public Set<String> getGroups()
    {
        return groups;
    }

    public Optional<Principal> getPrincipal()
    {
        return principal;<commit_msg>Restore ConnectorIdentity constructor parameter checks<commit_after>/*
 * 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 io.prestosql.spi.security;

import java.security.Principal;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Optional;
import java.util.Set;

import static java.util.Collections.emptyMap;
import static java.util.Collections.emptySet;
import static java.util.Collections.unmodifiableMap;
import static java.util.Collections.unmodifiableSet;
import static java.util.Objects.requireNonNull;

public class ConnectorIdentity
{
    private final String user;
    private final Set<String> groups;
    private final Optional<Principal> principal;
    private final Optional<SelectedRole> role;
    private final Map<String, String> extraCredentials;

    @Deprecated
    public ConnectorIdentity(String user, Optional<Principal> principal, Optional<SelectedRole> role)
    {
        this(user, principal, role, emptyMap());
    }

    @Deprecated
    public ConnectorIdentity(String user, Optional<Principal> principal, Optional<SelectedRole> role, Map<String, String> extraCredentials)
    {
        this(user, emptySet(), principal, role, extraCredentials);
    }

    private ConnectorIdentity(
            String user,
            Set<String> groups,
            Optional<Principal> principal,
            Optional<SelectedRole> role,
            Map<String, String> extraCredentials)
    {
        this.user = requireNonNull(user, "user is null");
        this.groups = unmodifiableSet(new HashSet<>(requireNonNull(groups, "groups is null")));
        this.principal = requireNonNull(principal, "principal is null");
        this.role = requireNonNull(role, "role is null");
        this.extraCredentials = unmodifiableMap(new HashMap<>(requireNonNull(extraCredentials, "extraCredentials is null")));
    }

    public String getUser()
    {
        return user;
    }

    public Set<String> getGroups()
    {
        return groups;
    }

    public Optional<Principal> getPrincipal()
    {
        return principal;
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