| // Copyright (C) 2013 The Android Open Source Project |
| // |
| // 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.googlesource.gerrit.plugins.hooks.workflow; |
| |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Sets; |
| import com.google.gerrit.common.Nullable; |
| import com.google.inject.Inject; |
| import com.google.inject.assistedinject.Assisted; |
| |
| import com.googlesource.gerrit.plugins.hooks.workflow.action.Action; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * A condition as used in {@link Rule}, as precondition to {@link Action}s. |
| * <p> |
| * A condition consists of a key and an associated set of values. |
| * <p> |
| * For positive conditions (see constructor), the condition is said to match a |
| * set of properties, if this set contains at least one property that matches |
| * the rules key and whose value matches at least one of the rule's value. |
| * <p> |
| * For negated conditions (see constructor), the condition is said to match a |
| * set of properties, if this set does not contain any property that matches |
| * the rules key and whose value matches at least one of the rule's value. |
| */ |
| public class Condition { |
| private final String key; |
| private final Set<String> values; |
| private final boolean negated; |
| |
| public interface Factory { |
| Condition create(@Assisted("key") String key, |
| @Assisted("values") String values); |
| } |
| |
| /** |
| * Constructs a condition. |
| * @param key The key to use for values. |
| * @param values A comma separated list of values to associate to the key. If |
| * the first value is not "!", it's a positive condition. If the first |
| * value is "!", the "!" is removed from the values and the condition is |
| * considered a negated condition. |
| */ |
| @Inject |
| public Condition(@Assisted("key") String key, |
| @Nullable @Assisted("values") String values) { |
| this.key = key; |
| Set<String> modifyableValues; |
| boolean modifyableNegated = false; |
| if (values == null) { |
| modifyableValues = Collections.emptySet(); |
| } else { |
| List<String> valueList = Lists.newArrayList(values.split(",")); |
| if (!valueList.isEmpty() && "!".equals(valueList.get(0))) { |
| modifyableNegated = true; |
| valueList.remove(0); |
| } |
| modifyableValues = Sets.newHashSet(valueList); |
| } |
| this.values = Collections.unmodifiableSet(modifyableValues); |
| this.negated = modifyableNegated; |
| } |
| |
| public String getKey() { |
| return key; |
| } |
| |
| /** |
| * Checks whether or not the Condition matches the given set of properties |
| * |
| * @param properties The set of properties to match against. |
| * @return For positive conditions, true iff properties contains at least |
| * one property that matches the rules key and whose value matches at |
| * least one of the rule's value. For negated conditions, true iff |
| * properties does not contain any property that matches the rules key |
| * and whose value matches at least one of the rule's value. |
| */ |
| public boolean isMetBy(Iterable<Property> properties) { |
| for (Property property : properties) { |
| String propertyKey = property.getKey(); |
| if ((key == null && propertyKey == null) |
| || (key != null && key.equals(propertyKey))) { |
| if (values.contains(property.getValue())) { |
| return !negated; |
| } |
| } |
| } |
| return negated; |
| } |
| |
| @Override |
| public String toString() { |
| return "[" + key + " = " + values + "]"; |
| } |
| } |