CheckedHashMap at revision 7112

Trivial commit which can not be fundamentally different. In Geotk:

• Fields et methods use generic types.
• The valueType and keyType fields are private and documented.
• The put method is synchronized, documented, checks for write access, delegates the type check to a ensureValidType private method, and formats error message using resource bundles. The Geotk relevant code is:

@Override
public V put(final K key, final V value)
        throws IllegalArgumentException, UnsupportedOperationException
{
    ensureValidType(key,     keyType);
    ensureValidType(value, valueType);
    synchronized (getLock()) {
        checkWritePermission();
        return super.put(key, value);
    }
}

Command line:

svn cat -r7112 https://svn.osgeo.org/geotools/trunk/modules/library/metadata/src/main/java/org/geotools/util/CheckedHashMap.java

package org.geotools.util;

import java.util.HashMap;

public class MapOf extends HashMap {
    private Class valueType;
    private Class keyType;

    public MapOf( Class keyType, Class valueType ){
        this.keyType = keyType;
        this.valueType = valueType;
    }

    public Object put( Object key, Object value ) {
        if( key != null && !keyType.isInstance( key ) ){
            throw new IllegalArgumentException( "Key limited to type "+keyType.getName() );
        }
        if( value != null && !valueType.isInstance( value ) ){
            throw new IllegalArgumentException( "Value limited type "+valueType.getName() );
        }
        return super.put( key, value );
    }
}