jakarta.mail.search.StringTerm Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package jakarta.mail.search;
/**
* This class implements the match method for Strings. The current
* implementation provides only for substring matching. We
* could add comparisons (like strcmp ...).
*
* @author Bill Shannon
* @author John Mani
*/
public abstract class StringTerm extends SearchTerm {
/**
* The pattern.
*
* @serial
*/
protected String pattern;
/**
* Ignore case when comparing?
*
* @serial
*/
protected boolean ignoreCase;
private static final long serialVersionUID = 1274042129007696269L;
/**
* Construct a StringTerm with the given pattern.
* Case will be ignored.
*
* @param pattern the pattern
*/
protected StringTerm(String pattern) {
this.pattern = pattern;
ignoreCase = true;
}
/**
* Construct a StringTerm with the given pattern and ignoreCase flag.
*
* @param pattern the pattern
* @param ignoreCase should we ignore case?
*/
protected StringTerm(String pattern, boolean ignoreCase) {
this.pattern = pattern;
this.ignoreCase = ignoreCase;
}
/**
* Return the string to match with.
*
* @return the string to match
*/
public String getPattern() {
return pattern;
}
/**
* Return true if we should ignore case when matching.
*
* @return true if we should ignore case
*/
public boolean getIgnoreCase() {
return ignoreCase;
}
protected boolean match(String s) {
int len = s.length() - pattern.length();
for (int i=0; i <= len; i++) {
if (s.regionMatches(ignoreCase, i,
pattern, 0, pattern.length()))
return true;
}
return false;
}
/**
* Equality comparison.
*/
@Override
public boolean equals(Object obj) {
if (!(obj instanceof StringTerm))
return false;
StringTerm st = (StringTerm)obj;
if (ignoreCase)
return st.pattern.equalsIgnoreCase(this.pattern) &&
st.ignoreCase == this.ignoreCase;
else
return st.pattern.equals(this.pattern) &&
st.ignoreCase == this.ignoreCase;
}
/**
* Compute a hashCode for this object.
*/
@Override
public int hashCode() {
return ignoreCase ? pattern.hashCode() : ~pattern.hashCode();
}
}