/* Woodstox XML processor
 *
 * Copyright (c) 2004- Tatu Saloranta, tatu.saloranta@iki.fi
 *
 * Licensed under the License specified in the file LICENSE which is
 * included with the source code.
 * You may not use this file except in compliance with the License.
 *
 * 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 com.ctc.wstx.msv;

import org.codehaus.stax2.validation.ValidationContext;

This is an implementation of SAX Attributes interface, that proxies requests to the ValidationContext. It is needed by some MSV components (specifically, W3C Schema Validator) for limited access to attribute values during start element validation. /**
 * This is an implementation of SAX Attributes interface, that proxies
 * requests to the {@link ValidationContext}.
 * It is needed by some MSV components (specifically, W3C Schema Validator)
 * for limited access to attribute values during start element validation.
 */
final class AttributeProxy
    implements org.xml.sax.Attributes
{
    private final ValidationContext mContext;

    public AttributeProxy(ValidationContext ctxt)
    {
        mContext = ctxt;
    }

    /*
    ///////////////////////////////////////////////
    // Attributes implementation
    ///////////////////////////////////////////////
    */

    @Override
    public int getIndex(String qName)
    {
        int cix = qName.indexOf(':');
        int acount = mContext.getAttributeCount();
        if (cix < 0) { // no prefix
            for (int i = 0; i < acount; ++i) {
                if (qName.equals(mContext.getAttributeLocalName(i))) {
                    String prefix = mContext.getAttributePrefix(i);
                    if (prefix == null || prefix.length() == 0) {
                        return i;
                    }
                }
            }
        } else {
            String prefix = qName.substring(0, cix);
            String ln = qName.substring(cix+1);

            for (int i = 0; i < acount; ++i) {
                if (ln.equals(mContext.getAttributeLocalName(i))) {
                    String p2 = mContext.getAttributePrefix(i);
                    if (p2 != null && prefix.equals(p2)) {
                        return i;
                    }
                }
            }
        }
        return -1;
    }

    @Override
    public int getIndex(String uri, String localName) {
        return mContext.findAttributeIndex(uri, localName);
    }

    @Override
    public int getLength() {
        return mContext.getAttributeCount();
    }

    @Override
    public String getLocalName(int index) {
        return mContext.getAttributeLocalName(index);
    }

    @Override
    public String getQName(int index)
    {
        String prefix = mContext.getAttributePrefix(index);
        String ln = mContext.getAttributeLocalName(index);

        if (prefix == null || prefix.length() == 0) {
            return ln;
        }
        StringBuilder sb = new StringBuilder(prefix.length() + 1 + ln.length());
        sb.append(prefix);
        sb.append(':');
        sb.append(ln);
        return sb.toString();
    }

    @Override
    public String getType(int index)
    {
        return mContext.getAttributeType(index);
    }

    @Override
    public String getType(String qName)
    {
        return getType(getIndex(qName));
    }

    @Override
    public String getType(String uri, String localName)
    {
        return getType(getIndex(uri, localName));
    }

    @Override
    public String getURI(int index)
    {
        return mContext.getAttributeNamespace(index);
    }

    @Override
    public String getValue(int index)
    {
        return mContext.getAttributeValue(index);
    }

    @Override
    public String getValue(String qName)
    {
        return getValue(getIndex(qName));
    }

    @Override
    public String getValue(String uri, String localName)     
    {
        return mContext.getAttributeValue(uri, localName);
    }
}