/*
 *    Copyright (c) 2008-2011 Graham Allan
 *
 *   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 org.mutabilitydetector.locations;

import javax.annotation.Nonnull;
import javax.annotation.concurrent.Immutable;

@Immutable
public abstract class ClassName {
    private final String asString;

    public ClassName(@Nonnull String className) {
        this.asString = className;
    }

    public String asString() {
        return asString;
    }

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

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

    @Override
    public boolean equals(Object obj) {
        if (this == obj) { return true; }
        if (obj == null) { return false; }
        if (getClass() != obj.getClass()) { return false; }
        ClassName other = (ClassName) obj;
        return asString.equals(other.asString);
    }

}

/*
 *    Copyright (c) 2008-2011 Graham Allan
 *
 *   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 org.mutabilitydetector.locations;

import javax.annotation.Nonnull;

public abstract class ClassName {
    private final String asString;

    public ClassName(@Nonnull String className) {
        this.asString = className;
    }

    public String asString() {
        return asString;
    }

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

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

    @Override
    public boolean equals(Object obj) {
        if (this == obj) { return true; }
        if (obj == null) { return false; }
        if (getClass() != obj.getClass()) { return false; }
        ClassName other = (ClassName) obj;
        return asString.equals(other.asString);
    }

}

Remove @Immutable annotation from abstract class.