/*
 * Copyright (c) 2014 Snowplow Analytics Ltd. All rights reserved.
 *
 * This program is licensed to you under the Apache License Version 2.0,
 * and you may not use this file except in compliance with the Apache License Version 2.0.
 * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the Apache License Version 2.0 is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
 */

package com.snowplowanalytics.snowplow.tracker;

public class LinkedHashMap<K,V> extends java.util.LinkedHashMap<K, V> {
    @Override
    public V put(K key, V value) {
        if(value != null)
            return super.put(key, value);
        else
            return null;
    }
}

/*
 * Copyright (c) 2014 Snowplow Analytics Ltd. All rights reserved.
 *
 * This program is licensed to you under the Apache License Version 2.0,
 * and you may not use this file except in compliance with the Apache License Version 2.0.
 * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the Apache License Version 2.0 is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
 */

package com.snowplowanalytics.snowplow.tracker;

public class LinkedHashMap<K,V> extends java.util.LinkedHashMap<K, V> {
    @Override
    public V put(K key, V value) {
        if(value != null && value != "")
            return super.put(key, value);
        else
            return null;
    }
}

Check for empty string insertion as well
Check for empty string insertion as well

 - Fixes #21
