asterix-graphix/src/main/java/org/apache/asterix/graphix/lang/struct/ElementLabel.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.asterix.graphix.lang.struct;

import java.io.Serializable;
import java.util.Objects;

public class ElementLabel implements Serializable {
    private static final long serialVersionUID = 1L;

    private final String labelName;
    private boolean isInferred;

    public ElementLabel(String labelName) {
        this(labelName, false);
    }

    private ElementLabel(String labelName, boolean isInferred) {
        this.labelName = Objects.requireNonNull(labelName);
        this.isInferred = isInferred;
    }

    public ElementLabel asInferred() {
        return new ElementLabel(labelName, true);
    }

    public void markInferred(boolean isInferred) {
        this.isInferred = isInferred;
    }

    public boolean isInferred() {
        return isInferred;
    }

    @Override
    public String toString() {
        return labelName;
    }

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

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o instanceof ElementLabel) {
            ElementLabel that = (ElementLabel) o;
            return this.labelName.equals(that.labelName);
        }
        return false;
    }
}