/
PolicyHelper.java
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/
PolicyHelper.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.storage;
import com.google.api.services.storage.model.Expr;
import com.google.api.services.storage.model.Policy.Bindings;
import com.google.cloud.Binding;
import com.google.cloud.Condition;
import com.google.cloud.Policy;
import com.google.common.collect.ImmutableList;
import java.util.ArrayList;
import java.util.List;
/**
* Helper for converting between the Policy model provided by the API and the Policy model provided
* by this library.
*/
class PolicyHelper {
static Policy convertFromApiPolicy(com.google.api.services.storage.model.Policy apiPolicy) {
Policy.Builder policyBuilder = Policy.newBuilder();
List<Bindings> bindings = apiPolicy.getBindings();
ImmutableList.Builder<Binding> coreBindings = ImmutableList.builder();
if (null != bindings && !bindings.isEmpty()) {
for (Bindings binding : bindings) {
Binding.Builder bindingBuilder = Binding.newBuilder();
bindingBuilder.setRole(binding.getRole());
bindingBuilder.setMembers(binding.getMembers());
if (binding.getCondition() != null) {
Condition.Builder conditionBuilder = Condition.newBuilder();
conditionBuilder.setTitle(binding.getCondition().getTitle());
conditionBuilder.setDescription(binding.getCondition().getDescription());
conditionBuilder.setExpression(binding.getCondition().getExpression());
bindingBuilder.setCondition(conditionBuilder.build());
}
coreBindings.add(bindingBuilder.build());
}
}
policyBuilder.setBindings(coreBindings.build());
return policyBuilder.setEtag(apiPolicy.getEtag()).setVersion(apiPolicy.getVersion()).build();
}
static com.google.api.services.storage.model.Policy convertToApiPolicy(Policy policy) {
List<Bindings> bindings = new ArrayList<>(policy.getBindingsList().size());
for (Binding binding : policy.getBindingsList()) {
Bindings apiBinding = new Bindings();
apiBinding.setRole(binding.getRole());
apiBinding.setMembers(new ArrayList<>(binding.getMembers()));
if (binding.getCondition() != null) {
Expr expr = new Expr();
expr.setTitle(binding.getCondition().getTitle());
expr.setDescription(binding.getCondition().getDescription());
expr.setExpression(binding.getCondition().getExpression());
apiBinding.setCondition(expr);
}
bindings.add(apiBinding);
}
return new com.google.api.services.storage.model.Policy()
.setBindings(bindings)
.setEtag(policy.getEtag())
.setVersion(policy.getVersion());
}
private PolicyHelper() {
// Intentionally left blank.
}
}