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5f0ab25382
MultiProtocolURI during normalform computation because that should always be done and also be done during initialization of the MultiProtocolURI Object. The new normalform method takes only one argument which should be 'true' unless you know exactly what you are doing.
115 lines
4.0 KiB
Java
115 lines
4.0 KiB
Java
// ImageEntry.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, 2006
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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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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program 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
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.document.parser.html;
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import java.util.Comparator;
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import net.yacy.cora.document.MultiProtocolURI;
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public class ImageEntry implements Comparable<ImageEntry>, Comparator<ImageEntry> {
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private final MultiProtocolURI url;
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private final String alt;
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private final int width, height;
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private final long fileSize;
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public ImageEntry(final MultiProtocolURI url, final String alt, final int width, final int height, long fileSize) {
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assert url != null;
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this.url = url;
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this.alt = alt;
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this.width = width;
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this.height = height;
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this.fileSize = fileSize;
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}
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public MultiProtocolURI url() {
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return this.url;
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}
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public String alt() {
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return this.alt;
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}
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public int width() {
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return this.width;
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}
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public int height() {
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return this.height;
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}
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public long fileSize() {
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return this.fileSize;
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}
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@Override
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public String toString() {
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return "<img url=\"" + this.url.toNormalform(false) + "\"" +
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(this.alt != null && this.alt.length() > 0 ? " alt=\"" + this.alt + "\"" : "") +
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(this.width >= 0 ? " width=\"" + this.width + "\"" : "") +
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(this.height >= 0 ? " height=\"" + this.height + "\"" : "") +
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">";
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}
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@Override
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public int hashCode() {
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// if htmlFilterImageEntry elements are stored in a TreeSet, the biggest images shall be listed first
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// this hash method therefore tries to compute a 'perfect hash' based on the size of the images
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// unfortunately it can not be ensured that all images get different hashes, but this should appear
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// only in very rare cases
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if (this.width < 0 || this.height < 0)
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return /*0x7FFF0000 |*/ (this.url.hashCode() & 0xFFFF);
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return ((0x7FFF - (((this.width * this.height) >> 9) & 0x7FFF)) << 16) | (this.url.hashCode() & 0xFFFF);
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}
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@Override
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public int compareTo(final ImageEntry h) {
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// this is needed if this object is stored in a TreeSet
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// this method uses the image-size ordering from the hashCode method
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// assuming that hashCode would return a 'perfect hash' this method would
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// create a total ordering on images with respect on the image size
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assert (this.url != null);
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if (this.url.toNormalform(true).equals((h).url.toNormalform(true))) return 0;
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final int thc = this.hashCode();
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final int ohc = (h).hashCode();
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if (thc < ohc) return -1;
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if (thc > ohc) return 1;
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return this.url.toString().compareTo((h).url.toString());
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}
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@Override
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public int compare(ImageEntry o1, ImageEntry o2) {
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return o1.compareTo(o2);
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}
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@Override
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public boolean equals(final Object o) {
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if(o != null && o instanceof ImageEntry) {
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return compareTo((ImageEntry) o) == 0;
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}
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return super.equals(o);
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}
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}
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