Examples with PhraseItem com.yahoo.prelude.query.PhraseItem used on opensource projects

Example 1 with PhraseItem

use of com.yahoo.prelude.query.PhraseItem in project vespa by vespa-engine.

the class CollapsePhraseSearcher method simplifyPhrases.

private Item simplifyPhrases(Item root) {
    if (root == null) {
        return root;
    } else if (root instanceof PhraseItem) {
        return collapsePhrase((PhraseItem) root);
    } else if (root instanceof CompositeItem) {
        CompositeItem composite = (CompositeItem) root;
        ListIterator<Item> i = composite.getItemIterator();
        while (i.hasNext()) {
            Item original = i.next();
            Item transformed = simplifyPhrases(original);
            if (original != transformed)
                i.set(transformed);
        }
        return root;
    } else {
        return root;
    }
}

Example 2 with PhraseItem

use of com.yahoo.prelude.query.PhraseItem in project vespa by vespa-engine.

the class PhraseParser method forcedPhrase.

/**
 * Ignores everything but words and numbers
 *
 * @return a phrase item if several words/numbers was found,
 *         a word item if only one was found
 */
private Item forcedPhrase() {
    Item firstWord = null;
    PhraseItem phrase = null;
    while (tokens.hasNext()) {
        Token token = tokens.next();
        if (token.kind != Token.Kind.WORD && token.kind != Token.Kind.NUMBER) {
            continue;
        }
        // Note, this depends on segment never creating AndItems when quoted
        // (the second argument) is true.
        Item newWord = segment(token);
        if (firstWord == null) {
            // First pass
            firstWord = newWord;
        } else if (phrase == null) {
            // Second pass
            phrase = new PhraseItem();
            phrase.addItem(firstWord);
            phrase.addItem(newWord);
        } else {
            // Following passes
            phrase.addItem(newWord);
        }
    }
    if (phrase != null) {
        return phrase;
    } else {
        return firstWord;
    }
}

Example 3 with PhraseItem

use of com.yahoo.prelude.query.PhraseItem in project vespa by vespa-engine.

the class WashPhrasesTestCase method testPositive1.

@Test
public void testPositive1() {
    AndItem root = new AndItem();
    root.addItem(new WordItem("a"));
    PhraseItem embedded = new PhraseItem();
    embedded.addItem(new WordItem("bcd"));
    root.addItem(embedded);
    root.addItem(new WordItem("e"));
    assertEquals("AND a bcd e", transformQuery(root));
}

Example 4 with PhraseItem

use of com.yahoo.prelude.query.PhraseItem in project vespa by vespa-engine.

the class WashPhrasesTestCase method testPositive2.

@Test
public void testPositive2() {
    AndItem root = new AndItem();
    root.addItem(new WordItem("a"));
    CompositeItem embedded = new AndItem();
    embedded.addItem(new WordItem("bcd"));
    CompositeItem phrase = new PhraseItem();
    phrase.addItem(new WordItem("def"));
    embedded.addItem(phrase);
    root.addItem(embedded);
    root.addItem(new WordItem("e"));
    assertEquals("AND a (AND bcd def) e", transformQuery(root));
}

Example 5 with PhraseItem

use of com.yahoo.prelude.query.PhraseItem in project vespa by vespa-engine.

the class WashPhrasesTestCase method testNegative3.

@Test
public void testNegative3() {
    AndItem root = new AndItem();
    root.addItem(new WordItem("a"));
    CompositeItem embedded = new AndItem();
    embedded.addItem(new WordItem("bcd"));
    CompositeItem phrase = new PhraseItem();
    phrase.addItem(new WordItem("def"));
    phrase.addItem(new WordItem("ghi"));
    embedded.addItem(phrase);
    root.addItem(embedded);
    root.addItem(new WordItem("e"));
    assertEquals("AND a (AND bcd \"def ghi\") e", transformQuery(root));
}