Hi folks,
I am playing with HighlighIt.java of "Luceneinaction" code. I have modified the text string so that "45 BC" will now "45BC" and another "45 BC" to "Z3950". I have also modified this line and my output file do not creates and highlighting.
Works: TermQuery query = new TermQuery(new Term("f", "ipsum")); TermQuery query = new TermQuery(new Term("f", "2000"));
Do not work:
TermQuery query = new TermQuery(new Term("f", "45BC")); TermQuery query = new TermQuery(new Term("f", "Z3950"));
This is a classic "analysis paralysis" issue. The HighlightIt code uses the StandardAnalyzer. Analyzing 45BC and Z3950 yields the following (from the Lucene In Action code, run "ant AnalyzerDemo"):
AnalyzerDemo:
[echo]
[echo] Demonstrates analysis of sample text.
[echo]
[echo] Refer to the "Analysis" chapter for much more on this
[echo] extremely crucial topic.
[echo]
[input] Press return to continue...
[input] String to analyze: [This string will be analyzed.]
45BC Z3950
[echo] Running lia.analysis.AnalyzerDemo...
[java] Analyzing "45BC Z3950"
...
[java] StandardAnalyzer:
[java] [45bc] [z3950]Notice that it has been lowercased. A TermQuery must match the case exactly as the tokens returned from the analysis process.
Change to "45bc" in your TermQuery and you'll see highlighting.
Erik
Modified text string from:
private static final String text = "Contrary to popular belief, Lorem Ipsum is" + " not simply random text. It has roots in a piece of" + " classical Latin literature from 45 BC, making it over" + " 2000 years old. Richard McClintock, a Latin professor" + " at Hampden-Sydney College in Virginia, looked up one" + " of the more obscure Latin words, consectetur, from" + " a Lorem Ipsum passage, and going through the cites" + " of the word in classical literature, discovered the" + " undoubtable source. Lorem Ipsum comes from sections" + " 1.10.32 and 1.10.33 of \"de Finibus Bonorum et" + " Malorum\" (The Extremes of Good and Evil) by Cicero," + " written in 45 BC. This book is a treatise on the" + " theory of ethics, very popular during the" + " Renaissance. The first line of Lorem Ipsum, \"Lorem" + " ipsum dolor sit amet..\", comes from a line in" + " section 1.10.32."; to
private static final String text = "Contrary to popular belief, Lorem Ipsum is" + " not simply random text. It has roots in a piece of" + " classical Latin literature from 45BC, making it over" + " 2000 years old. Richard McClintock, a Latin professor" + " at Hampden-Sydney College in Virginia, looked up one" + " of the more obscure Latin words, consectetur, from" + " a Lorem Ipsum passage, and going through the cites" + " of the word in classical literature, discovered the" + " undoubtable source. Lorem Ipsum comes from sections" + " 1.10.32 and 1.10.33 of \"de Finibus Bonorum et" + " Malorum\" (The Extremes of Good and Evil) by Cicero," + " written in Z3950. This book is a treatise on the" + " theory of ethics, very popular during the" + " Renaissance. The first line of Lorem Ipsum, \"Lorem" + " ipsum dolor sit amet..\", comes from a line in" + " section 1.10.32.";
Yagnesh N. Shah Senior Technology Engineer CS Dept., 4th Floor H. W. Wilson 950 University Avenue, Bronx NY 10452 (718) 588 8400 x2721 http://www.hwwilson.com
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