diff options
Diffstat (limited to 'gerrit-extension-api/src/main/java/com/google/gerrit/extensions/conditions/BooleanCondition.java')
| -rw-r--r-- | gerrit-extension-api/src/main/java/com/google/gerrit/extensions/conditions/BooleanCondition.java | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/conditions/BooleanCondition.java b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/conditions/BooleanCondition.java deleted file mode 100644 index 950365af83..0000000000 --- a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/conditions/BooleanCondition.java +++ /dev/null @@ -1,217 +0,0 @@ -// Copyright (C) 2017 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.google.gerrit.extensions.conditions; - -import com.google.common.collect.Iterables; -import java.util.Collections; - -/** Delayed evaluation of a boolean condition. */ -public abstract class BooleanCondition { - public static final BooleanCondition TRUE = new Value(true); - public static final BooleanCondition FALSE = new Value(false); - - public static BooleanCondition valueOf(boolean a) { - return a ? TRUE : FALSE; - } - - public static BooleanCondition and(BooleanCondition a, BooleanCondition b) { - return a == FALSE || b == FALSE ? FALSE : new And(a, b); - } - - public static BooleanCondition and(boolean a, BooleanCondition b) { - return and(valueOf(a), b); - } - - public static BooleanCondition or(BooleanCondition a, BooleanCondition b) { - return a == TRUE || b == TRUE ? TRUE : new Or(a, b); - } - - public static BooleanCondition or(boolean a, BooleanCondition b) { - return or(valueOf(a), b); - } - - public static BooleanCondition not(BooleanCondition bc) { - return bc == TRUE ? FALSE : bc == FALSE ? TRUE : new Not(bc); - } - - BooleanCondition() {} - - /** @return evaluate the condition and return its value. */ - public abstract boolean value(); - - /** - * Recursively collect all children of type {@code type}. - * - * @param type implementation type of the conditions to collect and return. - * @return non-null, unmodifiable iteration of children of type {@code type}. - */ - public abstract <T> Iterable<T> children(Class<T> type); - - private static final class And extends BooleanCondition { - private final BooleanCondition a; - private final BooleanCondition b; - - And(BooleanCondition a, BooleanCondition b) { - this.a = a; - this.b = b; - } - - @Override - public boolean value() { - return a.value() && b.value(); - } - - @Override - public <T> Iterable<T> children(Class<T> type) { - return Iterables.concat(a.children(type), b.children(type)); - } - - @Override - public int hashCode() { - return a.hashCode() * 31 + b.hashCode(); - } - - @Override - public boolean equals(Object other) { - if (other instanceof And) { - And o = (And) other; - return a.equals(o.a) && b.equals(o.b); - } - return false; - } - - @Override - public String toString() { - return "(" + maybeTrim(a, getClass()) + " && " + maybeTrim(a, getClass()) + ")"; - } - } - - private static final class Or extends BooleanCondition { - private final BooleanCondition a; - private final BooleanCondition b; - - Or(BooleanCondition a, BooleanCondition b) { - this.a = a; - this.b = b; - } - - @Override - public boolean value() { - return a.value() || b.value(); - } - - @Override - public <T> Iterable<T> children(Class<T> type) { - return Iterables.concat(a.children(type), b.children(type)); - } - - @Override - public int hashCode() { - return a.hashCode() * 31 + b.hashCode(); - } - - @Override - public boolean equals(Object other) { - if (other instanceof Or) { - Or o = (Or) other; - return a.equals(o.a) && b.equals(o.b); - } - return false; - } - - @Override - public String toString() { - return "(" + maybeTrim(a, getClass()) + " || " + maybeTrim(a, getClass()) + ")"; - } - } - - private static final class Not extends BooleanCondition { - private final BooleanCondition cond; - - Not(BooleanCondition bc) { - cond = bc; - } - - @Override - public boolean value() { - return !cond.value(); - } - - @Override - public <T> Iterable<T> children(Class<T> type) { - return cond.children(type); - } - - @Override - public int hashCode() { - return cond.hashCode() * 31; - } - - @Override - public boolean equals(Object other) { - return other instanceof Not ? cond.equals(((Not) other).cond) : false; - } - - @Override - public String toString() { - return "!" + cond; - } - } - - private static final class Value extends BooleanCondition { - private final boolean value; - - Value(boolean v) { - value = v; - } - - @Override - public boolean value() { - return value; - } - - @Override - public <T> Iterable<T> children(Class<T> type) { - return Collections.emptyList(); - } - - @Override - public int hashCode() { - return value ? 1 : 0; - } - - @Override - public boolean equals(Object other) { - return other instanceof Value ? value == ((Value) other).value : false; - } - - @Override - public String toString() { - return Boolean.toString(value); - } - } - - /** Remove leading '(' and trailing ')' if the type is the same as the parent. */ - static String maybeTrim(BooleanCondition cond, Class<? extends BooleanCondition> type) { - String s = cond.toString(); - if (cond.getClass() == type - && s.length() > 2 - && s.charAt(0) == '(' - && s.charAt(s.length() - 1) == ')') { - s = s.substring(1, s.length() - 1); - } - return s; - } -} |