/
InstanceId.java
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/
InstanceId.java
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/*
* Copyright 2017 Google LLC
*
* 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 com.google.cloud.spanner;
import com.google.api.pathtemplate.PathTemplate;
import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
import java.util.Map;
/** Represents the resource name of a Cloud Spanner Instance. */
public final class InstanceId {
private static final PathTemplate NAME_TEMPLATE =
PathTemplate.create("projects/{project}/instances/{instance}");
private final String project;
private final String instance;
InstanceId(String project, String instance) {
this.project = Preconditions.checkNotNull(project);
this.instance = Preconditions.checkNotNull(instance);
}
/** Returns the instance ID. */
public String getInstance() {
return instance;
}
/** Returns the ID of the project that owns this instance. */
public String getProject() {
return project;
}
/** Returns the name of the instance. */
public String getName() {
return String.format("projects/%s/instances/%s", project, instance);
}
@Override
public int hashCode() {
return Objects.hashCode(project, instance);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
InstanceId that = (InstanceId) o;
return that.project.equals(project) && that.instance.equals(instance);
}
@Override
public String toString() {
return getName();
}
/**
* Creates an {@code InstanceId} from the name of the instance.
*
* @param name the instance name of the form {@code projects/PROJECT_ID/instances/INSTANCE_ID}
* @throws IllegalArgumentException if {@code instanceName} does not conform to the expected
* pattern.
*/
static InstanceId of(String name) {
Preconditions.checkNotNull(name);
Map<String, String> parts = NAME_TEMPLATE.match(name);
Preconditions.checkArgument(
parts != null, "Name should conform to pattern %s: %s", NAME_TEMPLATE, name);
return of(parts.get("project"), parts.get("instance"));
}
/** Creates an {@code InstanceId} given project and instance IDs. */
public static InstanceId of(String project, String instance) {
return new InstanceId(project, instance);
}
}