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@ -29,6 +29,7 @@ package de.anomic.kelondro;
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import java.io.BufferedReader;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.util.HashMap;
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@ -41,13 +42,13 @@ public class kelondroMap {
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private final kelondroBLOB blob;
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private kelondroMScoreCluster<String> cacheScore;
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private HashMap<String, HashMap<String, String>> cache;
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private HashMap<String, Map<String, String>> cache;
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private final long startup;
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private final int cachesize;
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public kelondroMap(final kelondroBLOB blob, final int cachesize) {
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this.blob = blob;
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this.cache = new HashMap<String, HashMap<String, String>>();
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this.cache = new HashMap<String, Map<String, String>>();
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this.cacheScore = new kelondroMScoreCluster<String>();
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this.startup = System.currentTimeMillis();
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this.cachesize = cachesize;
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@ -67,7 +68,7 @@ public class kelondroMap {
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*/
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public void clear() throws IOException {
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this.blob.clear();
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this.cache = new HashMap<String, HashMap<String, String>>();
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this.cache = new HashMap<String, Map<String, String>>();
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this.cacheScore = new kelondroMScoreCluster<String>();
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}
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@ -108,7 +109,7 @@ public class kelondroMap {
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* @param newMap
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* @throws IOException
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*/
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public synchronized void put(String key, final HashMap<String, String> newMap) throws IOException {
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public synchronized void put(String key, final Map<String, String> newMap) throws IOException {
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assert (key != null);
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assert (key.length() > 0);
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assert (newMap != null);
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@ -163,18 +164,18 @@ public class kelondroMap {
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* @return
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* @throws IOException
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*/
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public synchronized HashMap<String, String> get(final String key) throws IOException {
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public synchronized Map<String, String> get(final String key) throws IOException {
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if (key == null) return null;
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return get(key, true);
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}
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protected synchronized HashMap<String, String> get(String key, final boolean storeCache) throws IOException {
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protected synchronized Map<String, String> get(String key, final boolean storeCache) throws IOException {
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// load map from cache
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assert key != null;
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if (cache == null) return null; // case may appear during shutdown
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while (key.length() < blob.keylength()) key += "_";
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HashMap<String, String> map = cache.get(key);
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Map<String, String> map = cache.get(key);
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if (map != null) return map;
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// load map from kra
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@ -269,7 +270,7 @@ public class kelondroMap {
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blob.close();
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}
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public class objectIterator implements Iterator<HashMap<String, String>> {
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public class objectIterator implements Iterator<Map<String, String>> {
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// enumerates Map-Type elements
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// the key is also included in every map that is returned; it's key is 'key'
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@ -285,14 +286,14 @@ public class kelondroMap {
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return (!(finish)) && (keyIterator.hasNext());
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}
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public HashMap<String, String> next() {
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public Map<String, String> next() {
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final byte[] nextKey = keyIterator.next();
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if (nextKey == null) {
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finish = true;
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return null;
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}
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try {
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final HashMap<String, String> obj = get(new String(nextKey));
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final Map<String, String> obj = get(new String(nextKey));
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if (obj == null) throw new kelondroException("no more elements available");
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return obj;
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} catch (final IOException e) {
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@ -306,4 +307,30 @@ public class kelondroMap {
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}
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} // class mapIterator
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public static void main(String[] args) {
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// test the class
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File f = new File("maptest");
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if (f.exists()) f.delete();
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try {
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// make a blob
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kelondroBLOB blob = new kelondroBLOBHeap(f, 12, kelondroNaturalOrder.naturalOrder);
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// make map
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kelondroMap map = new kelondroMap(blob, 1024);
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// put some values into the map
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HashMap<String, String> m = new HashMap<String, String>();
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m.put("k", "000"); map.put("123", m);
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m.put("k", "111"); map.put("456", m);
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m.put("k", "222"); map.put("789", m);
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// iterate over keys
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Iterator<byte[]> i = map.keys(true, false);
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while (i.hasNext()) {
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System.out.println("key: " + new String(i.next()));
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}
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// clean up
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map.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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orbiter
17 years ago