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3d95981f7d
*) minor changes git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7396 6c8d7289-2bf4-0310-a012-ef5d649a1542
99 lines
3.4 KiB
Java
99 lines
3.4 KiB
Java
// AbstractScraper.java
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// ---------------------------
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2004
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// You agree that the Author(s) is (are) not responsible for cost,
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// loss of data or any harm that may be caused by usage of this softare or
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// this documentation. The usage of this software is on your own risk. The
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// installation and usage (starting/running) of this software may allow other
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// people or application to access your computer and any attached devices and
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// is highly dependent on the configuration of the software which must be
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// done by the user of the software;the author(s) is (are) also
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// not responsible for proper configuration and usage of the software, even
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// if provoked by documentation provided together with the software.
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//
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// THE SOFTWARE THAT FOLLOWS AS ART OF PROGRAMMING BELOW THIS SECTION
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// IS PUBLISHED UNDER THE GPL AS DOCUMENTED IN THE FILE gpl.txt ASIDE THIS
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// FILE AND AS IN http://www.gnu.org/licenses/gpl.txt
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// ANY CHANGES TO THIS FILE ACCORDING TO THE GPL CAN BE DONE TO THE
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// LINES THAT FOLLOWS THIS COPYRIGHT NOTICE HERE, BUT CHANGES MUST NOT
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// BE DONE ABOVE OR INSIDE THE COPYRIGHT NOTICE. A RE-DISTRIBUTION
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// MUST CONTAIN THE INTACT AND UNCHANGED COPYRIGHT NOTICE.
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// CONTRIBUTIONS AND CHANGES TO THE PROGRAM CODE SHOULD BE MARKED AS SUCH.
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package net.yacy.document.parser.html;
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import java.util.Properties;
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import java.util.Set;
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public abstract class AbstractScraper implements Scraper {
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public static final char lb = '<';
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public static final char rb = '>';
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public static final char sl = '/';
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private Set<String> tags0;
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private Set<String> tags1;
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/**
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* create a scraper. the tag sets must contain tags in lowercase!
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* @param tags0
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* @param tags1
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*/
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public AbstractScraper(final Set<String> tags0, final Set<String> tags1) {
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this.tags0 = tags0;
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this.tags1 = tags1;
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}
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public boolean isTag0(final String tag) {
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return (tags0 != null) && (tags0.contains(tag.toLowerCase()));
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}
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public boolean isTag1(final String tag) {
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return (tags1 != null) && (tags1.contains(tag.toLowerCase()));
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}
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//the 'missing' method that shall be implemented:
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public abstract void scrapeText(char[] text, String insideTag);
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// the other methods must take into account to construct the return value correctly
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public abstract void scrapeTag0(String tagname, Properties tagopts);
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public abstract void scrapeTag1(String tagname, Properties tagopts, char[] text);
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protected static String stripAllTags(final char[] s) {
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final StringBuilder r = new StringBuilder(s.length);
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int bc = 0;
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for (final char c : s) {
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if (c == lb) {
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bc++;
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r.append(' ');
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} else if (c == rb) {
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bc--;
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} else if (bc <= 0) {
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r.append(c);
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}
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}
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return r.toString().trim();
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}
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public static String stripAll(final char[] s) {
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return CharacterCoding.html2unicode(stripAllTags(s));
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}
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public void close() {
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// free resources
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tags0 = null;
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tags1 = null;
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}
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}
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