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Reformatted and added inclusive notes to contructors/factories 

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@150021 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Erik Hatcher 2003-09-13 10:44:24 +00:00
parent 2e082f2f00
commit 8b2bd68e84
1 changed files with 114 additions and 93 deletions
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207
src/java/org/apache/lucene/search/DateFilter.java
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@ -64,102 +64,123 @@ import org.apache.lucene.index.TermDocs;
import org.apache.lucene.index.TermEnum;
import org.apache.lucene.index.IndexReader;
/** A Filter that restricts search results to a range of time.
<p>For this to work, documents must have been indexed with a {@link
DateField}. */
/**
* A Filter that restricts search results to a range of time.
*
* <p>For this to work, documents must have been indexed with a
* {@link DateField}.
*/
public class DateFilter extends Filter {
String field;
String field;
String start = DateField.MIN_DATE_STRING();
String end = DateField.MAX_DATE_STRING();
String start = DateField.MIN_DATE_STRING();
String end = DateField.MAX_DATE_STRING();
private DateFilter(String f) {
field = f;
}
/** Constructs a filter for field <code>f</code> matching dates between
<code>from</code> and <code>to</code>. */
public DateFilter(String f, Date from, Date to) {
field = f;
start = DateField.dateToString(from);
end = DateField.dateToString(to);
}
/** Constructs a filter for field <code>f</code> matching times between
<code>from</code> and <code>to</code>. */
public DateFilter(String f, long from, long to) {
field = f;
start = DateField.timeToString(from);
end = DateField.timeToString(to);
}
/** Constructs a filter for field <code>f</code> matching dates before
<code>date</code>. */
public static DateFilter Before(String field, Date date) {
DateFilter result = new DateFilter(field);
result.end = DateField.dateToString(date);
return result;
}
/** Constructs a filter for field <code>f</code> matching times before
<code>time</code>. */
public static DateFilter Before(String field, long time) {
DateFilter result = new DateFilter(field);
result.end = DateField.timeToString(time);
return result;
}
/** Constructs a filter for field <code>f</code> matching dates after
<code>date</code>. */
public static DateFilter After(String field, Date date) {
DateFilter result = new DateFilter(field);
result.start = DateField.dateToString(date);
return result;
}
/** Constructs a filter for field <code>f</code> matching times after
<code>time</code>. */
public static DateFilter After(String field, long time) {
DateFilter result = new DateFilter(field);
result.start = DateField.timeToString(time);
return result;
}
/** Returns a BitSet with true for documents which should be permitted in
search results, and false for those that should not. */
public BitSet bits(IndexReader reader) throws IOException {
BitSet bits = new BitSet(reader.maxDoc());
TermEnum enumerator = reader.terms(new Term(field, start));
TermDocs termDocs = reader.termDocs();
if (enumerator.term() == null)
return bits;
try {
Term stop = new Term(field, end);
while (enumerator.term().compareTo(stop) <= 0) {
termDocs.seek(enumerator.term());
try {
while (termDocs.next())
bits.set(termDocs.doc());
} finally {
termDocs.close();
}
if (!enumerator.next()) {
break;
}
}
} finally {
enumerator.close();
private DateFilter(String f) {
field = f;
}
return bits;
}
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer.append(field);
buffer.append(":");
buffer.append(DateField.stringToDate(start).toString());
buffer.append("-");
buffer.append(DateField.stringToDate(end).toString());
return buffer.toString();
}
/**
* Constructs a filter for field <code>f</code> matching dates
* between <code>from</code> and <code>to</code> inclusively.
*/
public DateFilter(String f, Date from, Date to) {
field = f;
start = DateField.dateToString(from);
end = DateField.dateToString(to);
}
/**
* Constructs a filter for field <code>f</code> matching times
* between <code>from</code> and <code>to</code> inclusively.
*/
public DateFilter(String f, long from, long to) {
field = f;
start = DateField.timeToString(from);
end = DateField.timeToString(to);
}
/**
* Constructs a filter for field <code>f</code> matching
* dates on or before before <code>date</code>.
*/
public static DateFilter Before(String field, Date date) {
DateFilter result = new DateFilter(field);
result.end = DateField.dateToString(date);
return result;
}
/**
* Constructs a filter for field <code>f</code> matching times
* on or before <code>time</code>.
*/
public static DateFilter Before(String field, long time) {
DateFilter result = new DateFilter(field);
result.end = DateField.timeToString(time);
return result;
}
/**
* Constructs a filter for field <code>f</code> matching
* dates on or after <code>date</code>.
*/
public static DateFilter After(String field, Date date) {
DateFilter result = new DateFilter(field);
result.start = DateField.dateToString(date);
return result;
}
/**
* Constructs a filter for field <code>f</code> matching
* times on or after <code>time</code>.
*/
public static DateFilter After(String field, long time) {
DateFilter result = new DateFilter(field);
result.start = DateField.timeToString(time);
return result;
}
/**
* Returns a BitSet with true for documents which should be
* permitted in search results, and false for those that should
* not.
*/
public BitSet bits(IndexReader reader) throws IOException {
BitSet bits = new BitSet(reader.maxDoc());
TermEnum enumerator = reader.terms(new Term(field, start));
TermDocs termDocs = reader.termDocs();
if (enumerator.term() == null) {
return bits;
}
try {
Term stop = new Term(field, end);
while (enumerator.term().compareTo(stop) <= 0) {
termDocs.seek(enumerator.term());
try {
while (termDocs.next()) {
bits.set(termDocs.doc());
}
} finally {
termDocs.close();
}
if (!enumerator.next()) {
break;
}
}
} finally {
enumerator.close();
}
return bits;
}
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer.append(field);
buffer.append(":");
buffer.append(DateField.stringToDate(start).toString());
buffer.append("-");
buffer.append(DateField.stringToDate(end).toString());
return buffer.toString();
}
}