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Groovy example source code file (ManagedConcurrentMap.java)

This example Groovy source code file (ManagedConcurrentMap.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

abstractconcurrentmap, entry, entrywithvalue, illegalargumentexception, illegalargumentexception, k, managedconcurrentmap, managedreference, referencebundle, referencebundle, segment, segment, v, v

The Groovy ManagedConcurrentMap.java source code

/*
 * Copyright 2003-2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.codehaus.groovy.util;

public class ManagedConcurrentMap<K,V> extends AbstractConcurrentMap {
    protected ReferenceBundle bundle;
    public ManagedConcurrentMap(ReferenceBundle bundle) {
        super(bundle);
        this.bundle = bundle;
        if (bundle==null) throw new IllegalArgumentException("bundle must not be null");
    }

    protected Segment<K,V> createSegment(Object segmentInfo, int cap) {
        ReferenceBundle bundle = (ReferenceBundle) segmentInfo;
        if (bundle==null) throw new IllegalArgumentException("bundle must not be null");
        return new ManagedConcurrentMap.Segment<K,V>(bundle, cap);
    }

    public static class Segment<K,V> extends AbstractConcurrentMap.Segment{
        protected final ReferenceBundle bundle;
        public Segment(ReferenceBundle bundle, int cap) {
            super(cap);
            this.bundle = bundle;
            if (bundle==null) throw new IllegalArgumentException("bundle must not be null");

        }

        protected AbstractConcurrentMap.Entry<K,V> createEntry(K key, int hash, V value) {
            if (bundle==null) throw new IllegalArgumentException("bundle must not be null");
            return new EntryWithValue<K,V>(bundle, this, key, hash, value);
        }
    }

    public static class Entry<K,V> extends ManagedReference implements AbstractConcurrentMap.Entry {
        private final Segment segment;
        private int hash;

        public Entry(ReferenceBundle bundle, Segment segment, K key, int hash) {
            super(bundle, key);
            this.segment = segment;
            this.hash = hash;
        }

        public boolean isValid() {
            return get() != null;
        }

        public boolean isEqual(K key, int hash) {
            return this.hash == hash && get() == key;
        }

        public V getValue() {
            return (V)this;
        }

        public void setValue(V value) {
        }

        public int getHash() {
            return hash;
        }

        public void finalizeRef() {
            super.finalizeReference();
            segment.removeEntry(this);
        }
    }

    public static class EntryWithValue<K,V> extends Entry {
        private V value;

        public EntryWithValue(ReferenceBundle bundle, Segment segment, K key, int hash, V value) {
            super(bundle, segment, key, hash);
            setValue(value);
        }

        public V getValue() {
            return value;
        }

        public void setValue(V value) {
            this.value = value;
        }


        public void finalizeRef() {
            value = null;
            super.finalizeRef();
        }
    }
}

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