/*   Copyright 2004 The Apache Software Foundation
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   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 org.apache.xmlbeans.impl.values;

import org.apache.xmlbeans.SchemaType;
import org.apache.xmlbeans.SimpleValue;
import org.apache.xmlbeans.XmlErrorCodes;
import org.apache.xmlbeans.XmlObject;
import org.apache.xmlbeans.impl.schema.BuiltinSchemaTypeSystem;
import org.apache.xmlbeans.impl.util.MathUtil;
import org.apache.xmlbeans.impl.util.XsTypeConverter;

import java.math.BigDecimal;
import java.math.BigInteger;

public abstract class JavaLongHolder extends XmlObjectBase {
    public SchemaType schemaType() {
        return BuiltinSchemaTypeSystem.ST_LONG;
    }

    private long _value;

    // SIMPLE VALUE ACCESSORS BELOW -------------------------------------------

    // gets raw text value
    protected String compute_text(NamespaceManager nsm) {
        return Long.toString(_value);
    }

    protected void set_text(String s) {
        try {
            set_long(XsTypeConverter.lexLong(s));
        } catch (Exception e) {
            throw new XmlValueOutOfRangeException(XmlErrorCodes.LONG, new Object[]{s});
        }
    }

    protected void set_nil() {
        _value = 0L;
    }

    // numerics: fractional
    public BigDecimal getBigDecimalValue() {
        check_dated();
        return BigDecimal.valueOf(_value);
    }

    public BigInteger getBigIntegerValue() {
        check_dated();
        return BigInteger.valueOf(_value);
    }

    public long getLongValue() {
        check_dated();
        return _value;
    }

    private static final BigInteger _max = BigInteger.valueOf(Long.MAX_VALUE);
    private static final BigInteger _min = BigInteger.valueOf(Long.MIN_VALUE);

    // setters
    protected void set_BigDecimal(BigDecimal v) {
        set_BigInteger(MathUtil.toBigInteger(v));
    }

    protected void set_BigInteger(BigInteger v) {
        if (v.compareTo(_max) > 0 || v.compareTo(_min) < 0) {
            throw new XmlValueOutOfRangeException();
        }
        _value = v.longValue();
    }

    protected void set_long(long l) {
        _value = l;
    }

    // comparators
    protected int compare_to(XmlObject l) {
        if (((SimpleValue) l).instanceType().getDecimalSize() > SchemaType.SIZE_LONG) {
            return -l.compareTo(this);
        }

        return Long.compare(_value, ((XmlObjectBase) l).getLongValue());
    }

    protected boolean equal_to(XmlObject l) {
        if (((SimpleValue) l).instanceType().getDecimalSize() > SchemaType.SIZE_LONG) {
            return l.valueEquals(this);
        }

        return _value == ((XmlObjectBase) l).getLongValue();
    }

    /**
     * Note, this is carefully aligned with hash codes for all xsd:decimal
     * primitives.
     */
    protected int value_hash_code() {
        return (int) ((_value >> 32) * 19 + _value);
    }

}
