| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.vxquery.datamodel.values; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| |
| import org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.primitive.BooleanPointable; |
| import org.apache.hyracks.data.std.util.ArrayBackedValueStorage; |
| import org.apache.vxquery.datamodel.builders.sequence.SequenceBuilder; |
| |
| public class XDMConstants { |
| private static final byte[] BOOLEAN_TRUE_CONSTANT; |
| |
| private static final byte[] BOOLEAN_FALSE_CONSTANT; |
| |
| private static final byte[] EMPTY_SEQUENCE; |
| |
| private static final byte[] EMPTY_STRING; |
| |
| private static final byte[] JS_NULL_CONSTANT; |
| |
| static { |
| BOOLEAN_TRUE_CONSTANT = new byte[2]; |
| BOOLEAN_TRUE_CONSTANT[0] = ValueTag.XS_BOOLEAN_TAG; |
| BooleanPointable.setBoolean(BOOLEAN_TRUE_CONSTANT, 1, true); |
| |
| BOOLEAN_FALSE_CONSTANT = new byte[2]; |
| BOOLEAN_FALSE_CONSTANT[0] = ValueTag.XS_BOOLEAN_TAG; |
| BooleanPointable.setBoolean(BOOLEAN_FALSE_CONSTANT, 1, false); |
| |
| ArrayBackedValueStorage abvs = new ArrayBackedValueStorage(); |
| SequenceBuilder sb = new SequenceBuilder(); |
| sb.reset(abvs); |
| try { |
| sb.finish(); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| EMPTY_SEQUENCE = Arrays.copyOf(abvs.getByteArray(), abvs.getLength()); |
| |
| EMPTY_STRING = new byte[3]; |
| EMPTY_STRING[0] = ValueTag.XS_STRING_TAG; |
| EMPTY_STRING[1] = 0; |
| EMPTY_STRING[2] = 0; |
| |
| JS_NULL_CONSTANT = new byte[1]; |
| JS_NULL_CONSTANT[0] = ValueTag.JS_NULL_TAG; |
| } |
| |
| private XDMConstants() { |
| } |
| |
| public static void setTrue(IPointable p) { |
| set(p, BOOLEAN_TRUE_CONSTANT); |
| } |
| |
| public static void setFalse(IPointable p) { |
| set(p, BOOLEAN_FALSE_CONSTANT); |
| } |
| |
| public static void setEmptySequence(IPointable p) { |
| set(p, EMPTY_SEQUENCE); |
| } |
| |
| public static void setEmptyString(IPointable p) { |
| set(p, EMPTY_STRING); |
| } |
| |
| public static void setJsNull(IPointable p) { |
| set(p, JS_NULL_CONSTANT); |
| } |
| |
| private static void set(IPointable p, byte[] array) { |
| p.set(array, 0, array.length); |
| } |
| } |