com.google.api.server.spi.config.scope.DisjunctAuthScopeExpression.java Source code

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Here is the source code for com.google.api.server.spi.config.scope.DisjunctAuthScopeExpression.java

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/*
 * Copyright 2016 Google Inc. All Rights Reserved.
 *
 * 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.api.server.spi.config.scope;

import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;

/**
 * An {@code AuthScopeExpression} that determines if a {@code User} is authorized for any contained
 * {@code AuthScopeExpression} instances.
 */
class DisjunctAuthScopeExpression extends AbstractAuthScopeExpression {

    private final ImmutableList<AbstractAuthScopeExpression> innerExpressions;

    DisjunctAuthScopeExpression(List<AbstractAuthScopeExpression> innerExpressions) {
        this.innerExpressions = ImmutableList.copyOf(innerExpressions);
    }

    @Override
    public String[] getAllScopes() {
        Set<String> allScopes = Sets.newLinkedHashSet();
        for (AuthScopeExpression innerExpression : innerExpressions) {
            allScopes.addAll(Arrays.asList(innerExpression.getAllScopes()));
        }
        return allScopes.toArray(new String[allScopes.size()]);
    }

    @Override
    public boolean isAuthorized(Set<String> userScopes) {
        if (innerExpressions.isEmpty()) {
            return false;
        }
        for (AuthScopeExpression innerExpression : innerExpressions) {
            if (innerExpression.isAuthorized(userScopes)) {
                return true;
            }
        }
        return false;
    }

    @Override
    List<String> encode() {
        return ImmutableList.copyOf(encodeMutable());
    }

    @Override
    List<String> encodeMutable() {
        List<String> expression = new ArrayList<>();
        for (AbstractAuthScopeExpression innerExpression : innerExpressions) {
            expression.addAll(innerExpression.encode());
        }
        return expression;
    }

    @Override
    public String toLoggingForm() {
        return "(" + Joiner.on(" || ")
                .join(Iterables.transform(innerExpressions, new Function<AuthScopeExpression, String>() {
                    @Override
                    public String apply(AuthScopeExpression scopeExpression) {
                        return scopeExpression.toLoggingForm();
                    }
                })) + ")";
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj == null || !(obj instanceof DisjunctAuthScopeExpression)) {
            return false;
        }
        DisjunctAuthScopeExpression that = (DisjunctAuthScopeExpression) obj;
        return innerExpressions.equals(that.innerExpressions);
    }

    @Override
    public int hashCode() {
        return innerExpressions.hashCode();
    }
}