mirror of
https://github.com/yacy/yacy_search_server.git
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4c7a77662a
to also support handling of urls w/o corresponding file-extension. For this refactor use of document.getParserObject() to alway return a Parser (for clean logic) and define/move the scraperObject as local var of AbstractParser. Adjust related calls to getParserObject (where actually a scraperObject is wanted). Addionally skip appending url token to parsed text for dht metadata entries (by default returned as result by rwi index).
104 lines
3.3 KiB
Java
104 lines
3.3 KiB
Java
/**
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* Parser
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* Copyright 2010 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 29.6.2010 at http://yacy.net
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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// this is a new implementation of the parser interface using multiple documents as result set
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// and a much simpler method structure with only one single parser method to implement
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package net.yacy.document;
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import java.util.ArrayList;
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import java.util.HashSet;
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import java.util.LinkedHashSet;
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import java.util.List;
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import java.util.Set;
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import net.yacy.cora.util.ConcurrentLog;
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public abstract class AbstractParser implements Parser {
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public final static ConcurrentLog log = new ConcurrentLog("PARSER");
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// use LinkedHashSet to maintain order, as in TextParser.initParser() supported_Extensions are mapped to 1. mime-type
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// means also, add the most common mime first, which is mapped to all extension
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protected final Set<String> SUPPORTED_MIME_TYPES = new LinkedHashSet<String>();
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protected final Set<String> SUPPORTED_EXTENSIONS = new HashSet<String>();
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private final String name;
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protected Object scraperObject; // used scraper or source object if any, otherwise null
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/**
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* initialize a parser with a name
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* @param name
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*/
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public AbstractParser(final String name) {
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this.name = name;
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}
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/**
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* return the name of the parser
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*/
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@Override
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public String getName() {
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return this.name;
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}
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/**
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* each parser must define a set of supported mime types
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* @return a set of mime type strings that are supported
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*/
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@Override
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public Set<String> supportedMimeTypes() {
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return this.SUPPORTED_MIME_TYPES;
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}
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/**
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* each parser must define a set of supported file extensions
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* @return a set of file name extensions that are supported
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*/
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@Override
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public Set<String> supportedExtensions() {
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return this.SUPPORTED_EXTENSIONS;
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}
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/**
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* check equivalence of parsers; this simply tests equality of parser names
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* @param o
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* @return
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*/
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@Override
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public boolean equals(final Object o) {
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return getName().equals(((Parser) o).getName());
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}
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/**
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* the hash code of a parser
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* @return the hash code of the parser name string
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*/
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@Override
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public int hashCode() {
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return getName().hashCode();
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}
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public static List<String> singleList(String t) {
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List<String> c = new ArrayList<String>(1);
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if (t != null) c.add(t);
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return c;
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}
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}
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