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 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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package com.sun.xml.internal.bind.v2.runtime;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Map;

import java.util.Set;

import javax.xml.namespace.QName;

import com.sun.xml.internal.bind.v2.util.QNameMap;

/**

 * Creates {@link Name}s and assign index numbers to them.

 *

 * <p>

 * During this process, this class also finds out which namespace URIs

 * are statically known to be un-bindable as the default namespace.

 * Those are the namespace URIs that are used by attribute names.

 *

 * @author Kohsuke Kawaguchi

 */

@SuppressWarnings({"StringEquality"})

public final class NameBuilder {

    private Map<String,Integer> uriIndexMap = new HashMap<String, Integer>();

    private Set<String> nonDefaultableNsUris = new HashSet<String>();

    private Map<String,Integer> localNameIndexMap = new HashMap<String, Integer>();

    private QNameMap<Integer> elementQNameIndexMap = new QNameMap<Integer>();

    private QNameMap<Integer> attributeQNameIndexMap = new QNameMap<Integer>();

    public Name createElementName(QName name) {

        return createElementName(name.getNamespaceURI(),name.getLocalPart());

    }

    public Name createElementName(String nsUri, String localName) {

        return createName(nsUri, localName, false, elementQNameIndexMap);

    }

    public Name createAttributeName(QName name) {

        return createAttributeName(name.getNamespaceURI(),name.getLocalPart());

    }

    public Name createAttributeName(String nsUri, String localName) {

        assert nsUri.intern()==nsUri;

        assert localName.intern()==localName;

        if(nsUri.length()==0)

            return new Name(

                    allocIndex(attributeQNameIndexMap,"",localName),

                    -1,

                    nsUri,

                    allocIndex(localNameIndexMap,localName),

                    localName,

                    true);

        else {

            nonDefaultableNsUris.add(nsUri);

            return createName(nsUri,localName, true, attributeQNameIndexMap);

        }

    }

    private Name createName(String nsUri, String localName, boolean isAttribute, QNameMap<Integer> map) {

        assert nsUri.intern()==nsUri;

        assert localName.intern()==localName;

        return new Name(

                allocIndex(map,nsUri,localName),

                allocIndex(uriIndexMap,nsUri),

                nsUri,

                allocIndex(localNameIndexMap,localName),

                localName,

                isAttribute );

    }

    private int allocIndex(Map<String,Integer> map, String str) {

        Integer i = map.get(str);

        if(i==null) {

            i = map.size();

            map.put(str,i);

        }

        return i;

    }

    private int allocIndex(QNameMap<Integer> map, String nsUri, String localName) {

        Integer i = map.get(nsUri,localName);

        if(i==null) {

            i = map.size();

            map.put(nsUri,localName,i);

        }

        return i;

    }

    /**

     * Wraps up everything and creates {@link NameList}.

     */

    public NameList conclude() {

        boolean[] nsUriCannotBeDefaulted = new boolean[uriIndexMap.size()];

        for (Map.Entry<String,Integer> e : uriIndexMap.entrySet()) {

            nsUriCannotBeDefaulted[e.getValue()] = nonDefaultableNsUris.contains(e.getKey());

        }

        NameList r = new NameList(

                list(uriIndexMap),

                nsUriCannotBeDefaulted,

                list(localNameIndexMap),

                elementQNameIndexMap.size(),

                attributeQNameIndexMap.size() );

        // delete them so that the create method can never be called again

        uriIndexMap = null;

        localNameIndexMap = null;

        return r;

    }

    private String[] list(Map<String, Integer> map) {

        String[] r = new String[map.size()];

        for (Map.Entry<String, Integer> e : map.entrySet())

            r[e.getValue()] = e.getKey();

        return r;

    }

}