free some memory after parsing html

source/net/yacy/document/parser/html/ContentScraper.java

@@ -131,6 +131,7 @@ public class ContentScraper extends AbstractScraper implements Scraper {
     private float lon, lat;
     private MultiProtocolURI canonical;
 
+
     /**
      * {@link MultiProtocolURI} to the favicon that belongs to the document
      */
@@ -175,6 +176,11 @@ public class ContentScraper extends AbstractScraper implements Scraper {
         this.canonical = null;
     }
 
+    @Override
+    public void finish() {
+        this.content.trimToSize();
+    }
+
     private void mergeAnchors(final MultiProtocolURI url, final Properties p) {
         final Properties p0 = this.anchors.get(url);
         if (p0 == null) {

source/net/yacy/document/parser/html/Scraper.java

@@ -1,4 +1,4 @@
-// Scraper.java 
+// Scraper.java
 // ---------------------------
 // (C) by Michael Peter Christen; mc@yacy.net
 // first published on http://www.anomic.de
@@ -39,10 +39,12 @@ public interface Scraper {
     public void scrapeTag1(String tagname, Properties tagopts, char[] text);
 
     public void scrapeComment(final char[] comment);
-    
+
+    public void finish();
+
     public void close();
-    
+
     public void registerHtmlFilterEventListener(ScraperListener listener);
-    
+
     public void deregisterHtmlFilterEventListener(ScraperListener listener);
 }

source/net/yacy/document/parser/html/TransformerWriter.java

@@ -534,8 +534,7 @@ public final class TransformerWriter extends Writer {
         this.filterOpts = null;
         if (this.filterCont != null) this.filterCont.close();
         this.filterCont = null;
-//      if (scraper != null) {scraper.close(); scraper = null;}
+        if (this.scraper != null) this.scraper.finish();
-//      if (transformer != null) {transformer.close(); transformer = null;}
     }
 
     private static boolean binaryHint(final char c) {

source/net/yacy/kelondro/io/CharBuffer.java

@@ -73,27 +73,6 @@ public final class CharBuffer extends Writer {
         this.maximumLength = maximumLength;
     }
 
-    public CharBuffer(final int maximumLength, final char[] bb, final int of, final int le) {
-        if (of * 2 > bb.length) {
-            this.buffer = new char[le];
-            System.arraycopy(bb, of, this.buffer, 0, le);
-            this.length = le;
-            this.offset = 0;
-        } else {
-            this.buffer = bb;
-            this.length = le;
-            this.offset = of;
-        }
-        this.maximumLength = maximumLength;
-    }
-
-    public CharBuffer(final CharBuffer bb) {
-        this.buffer = bb.buffer;
-        this.length = bb.length;
-        this.offset = bb.offset;
-        this.maximumLength = bb.maximumLength;
-    }
-
     public CharBuffer(final File f) throws IOException {
         // initially fill the buffer with the content of a file
         if (f.length() > Integer.MAX_VALUE) throw new IOException("file is too large for buffering");

source/net/yacy/peers/operation/yacyRelease.java

@@ -365,6 +365,7 @@ public final class yacyRelease extends yacyVersion {
             try {
                 final CharBuffer signBuffer = new CharBuffer(getSignatureFile());
                 final byte[] signByteBuffer = Base64Order.standardCoder.decode(signBuffer.toString().trim());
+                signBuffer.close();
                 final CryptoLib cl = new CryptoLib();
                 for(final yacyUpdateLocation updateLocation : latestReleaseLocations) {
                     try {