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/*
 * Copyright (c) 2017, salesforce.com, inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided
 * that the following conditions are met:
 *
 *    Redistributions of source code must retain the above copyright notice, this list of conditions and the
 *    following disclaimer.
 *
 *    Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
 *    the following disclaimer in the documentation and/or other materials provided with the distribution.
 *
 *    Neither the name of salesforce.com, inc. nor the names of its contributors may be used to endorse or
 *    promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package com.sforce.ws.wsdl;

import java.util.regex.Pattern;
import java.util.regex.Matcher;

import javax.xml.namespace.QName;

import com.sforce.ws.parser.XmlInputStream;

/**
 * This class represents WSDL->definitions->types->schema->complexType->attribute
 *
 * @author http://cheenath.com
 * @version 158
 */
public class Attribute implements Constants {

    private Schema schema;
    private String name;
    private QName type;
    private static final int MAX_LENGTH = 255;

    private static final Pattern pattern = Pattern.compile("[\\s:]");

    public Attribute(Schema schema) {
        this.schema = schema;
    }

    @Override
    public String toString() {
        return "Attribute{" +
                "name=" + name +
                '}';
    }

    public String getName() {
        return name;
    }

    public QName getType() {
        return type;
    }

    void read(WsdlParser parser) throws WsdlParseException {
        name = parser.getAttributeValue(null, NAME);

        if (name == null) {
            throw new WsdlParseException("attribute name can not be null at: " + parser.getPositionDescription());
        }

        if ("".equals(name)) {
            throw new WsdlParseException("attribute name can not be empty at: " + parser.getPositionDescription());
        }

        if (name.length() > MAX_LENGTH) {
            throw new WsdlParseException("attribute name '" + name + "' bigger than max length: " + MAX_LENGTH);
        }

        Matcher matcher = pattern.matcher(name);
        if (matcher.find()) {
            throw new WsdlParseException("attribute name '" + name + "' is not a valid attribute name");
        }

        String t = parser.getAttributeValue(null, TYPE);

        if (t != null) {
            type = ParserUtil.toQName(t, parser);
        }

        int eventType = parser.getEventType();

        while (true) {
            if (eventType == XmlInputStream.START_TAG) {
                String name = parser.getName();
                String namespace = parser.getNamespace();

                if (SIMPLE_TYPE.equals(name) && SCHEMA_NS.equals(namespace)) {
                    if (type != null) {
                        throw new WsdlParseException("type should not be specified: " + parser.getPositionDescription());
                    }

                    SimpleType st = new SimpleType(schema);
                    st.read(parser, name);

                    type = new QName(SCHEMA_NS, "string");
                }

            } else if (eventType == XmlInputStream.END_TAG) {
                String name = parser.getName();
                String namespace = parser.getNamespace();

                if (ATTRIBUTE.equals(name) && SCHEMA_NS.equals(namespace)) {
                    break;
                }
            } else if (eventType == XmlInputStream.END_DOCUMENT) {
                throw new WsdlParseException("Failed to find end tag for 'attribute'");
            }

            eventType = parser.next();
        }

        if (type == null) {
            throw new WsdlParseException("type not specified for attribute: " + name);
        }
    }
}