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// Copyright (C) 2009 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.index.query;
import java.util.Collection;
/** Predicate to filter a field by matching value. */
public abstract class OperatorPredicate<T> extends Predicate<T> {
protected final String name;
protected final String value;
public OperatorPredicate(String name, String value) {
this.name = name;
this.value = value;
}
public String getOperator() {
return name;
}
public String getValue() {
return value;
}
@Override
public Predicate<T> copy(Collection<? extends Predicate<T>> children) {
if (!children.isEmpty()) {
throw new IllegalArgumentException("Expected 0 children");
}
return this;
}
@Override
public int hashCode() {
return getOperator().hashCode() * 31 + getValue().hashCode();
}
@Override
public boolean equals(Object other) {
if (other == null) {
return false;
}
if (getClass() == other.getClass()) {
final OperatorPredicate<?> p = (OperatorPredicate<?>) other;
return getOperator().equals(p.getOperator()) && getValue().equals(p.getValue());
}
return false;
}
@Override
public String toString() {
final String val = getValue();
if (QueryParser.isSingleWord(val)) {
return getOperator() + ":" + val;
}
return getOperator() + ":\"" + val + "\"";
}
}
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