com.enonic.cms.domain.CaseInsensitiveString.java Source code

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Here is the source code for com.enonic.cms.domain.CaseInsensitiveString.java

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/*
 * Copyright 2000-2011 Enonic AS
 * http://www.enonic.com/license
 */
package com.enonic.cms.domain;

import java.io.Serializable;

import org.apache.commons.lang.builder.HashCodeBuilder;

/**
 * A class that should work exactely like String, except that when comparing to another String, the case is ignored on the equals method.
 * This is important because frameworks like Hibernate can use this instead of <code>java.lang.String</code>, as keys or other base values
 * where the comparator operation needs to be case insensitve.
 * <p/>
 * Not all methods of String are implemented yet.  If any other methods are needed, just implement them by calling the same method on the
 * <code>caseInsensitiveValue</code> string.
 */
public class CaseInsensitiveString implements Serializable, Comparable<CaseInsensitiveString> {
    private String caseInsensitiveValue;

    public CaseInsensitiveString(String s) {
        if (s == null) {
            throw new NullPointerException("CaseInsensitiveString may not take a null value.");
        }
        caseInsensitiveValue = s;
    }

    public int compareTo(CaseInsensitiveString otherCaseInsensitiveString) {
        return caseInsensitiveValue.toLowerCase().compareTo(otherCaseInsensitiveString.toString().toLowerCase());
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        CaseInsensitiveString that = (CaseInsensitiveString) o;

        if (caseInsensitiveValue.equalsIgnoreCase(that.caseInsensitiveValue)) {
            return true;
        } else {
            return false;
        }
    }

    @Override
    public int hashCode() {
        return new HashCodeBuilder(495, 73).append(caseInsensitiveValue.toLowerCase()).toHashCode();
    }

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