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ImmutableConnectionIdPlaceholder.java
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ImmutableConnectionIdPlaceholder.java
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/*
* Copyright (c) 2020 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.connectivity.service.placeholders;
import static org.eclipse.ditto.base.model.common.ConditionChecker.argumentNotEmpty;
import static org.eclipse.ditto.base.model.common.ConditionChecker.checkNotNull;
import java.util.Collections;
import java.util.List;
import javax.annotation.concurrent.Immutable;
import org.eclipse.ditto.connectivity.model.ConnectionId;
/**
* Placeholder implementation that replaces {@code connection:id}.
* The input value is a String and must be a valid connection ID.
*
*/
@Immutable
final class ImmutableConnectionIdPlaceholder implements ConnectionIdPlaceholder {
private static final String ID_PLACEHOLDER = "id";
private static final List<String> SUPPORTED_PLACEHOLDERS = Collections.singletonList(ID_PLACEHOLDER);
/**
* Singleton instance of the ImmutableThingPlaceholder.
*/
static final ImmutableConnectionIdPlaceholder INSTANCE = new ImmutableConnectionIdPlaceholder();
@Override
public String getPrefix() {
return "connection";
}
@Override
public List<String> getSupportedNames() {
return SUPPORTED_PLACEHOLDERS;
}
@Override
public boolean supports(final String name) {
return SUPPORTED_PLACEHOLDERS.contains(name);
}
@Override
public List<String> resolveValues(final ConnectionId connectionId, final String placeholder) {
argumentNotEmpty(placeholder, "placeholder");
checkNotNull(connectionId, "Connection ID");
if (ID_PLACEHOLDER.equals(placeholder)) {
return Collections.singletonList(connectionId.toString());
}
return Collections.emptyList();
}
}