| /* |
| * 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.daffodil.grammar.primitives |
| |
| import java.util.regex.PatternSyntaxException |
| import org.apache.daffodil.dsom.ElementBase |
| import org.apache.daffodil.grammar.Gram |
| import org.apache.daffodil.grammar.Terminal |
| import org.apache.daffodil.processors.parsers._ |
| import org.apache.daffodil.processors.unparsers._ |
| import org.apache.daffodil.exceptions.Assert |
| import org.apache.daffodil.processors.unparsers.SpecifiedLengthExplicitImplicitUnparser |
| import org.apache.daffodil.processors.parsers.SpecifiedLengthExplicitParser |
| import org.apache.daffodil.processors.parsers.SpecifiedLengthImplicitParser |
| import org.apache.daffodil.dpath.NodeInfo.PrimType |
| import org.apache.daffodil.processors.parsers.Parser |
| |
| abstract class SpecifiedLengthCombinatorBase(val e: ElementBase, eGramArg: => Gram) |
| extends Terminal(e, true) { |
| |
| lazy val eGram = eGramArg // once only |
| |
| final protected lazy val eParser: Parser = { |
| val p = eGram.parser |
| p |
| } |
| |
| lazy val eUnparser = { |
| val u = eGram.unparser |
| u |
| } |
| |
| def kind: String |
| |
| def toBriefXML(depthLimit: Int = -1): String = { |
| if (depthLimit == 0) "..." else |
| "<SpecifiedLengthCombinator_" + kind + ">" + |
| eParser.toBriefXML(depthLimit - 1) + |
| "</SpecifiedLengthCombinator_" + kind + ">" |
| } |
| |
| } |
| |
| class SpecifiedLengthPattern(e: ElementBase, eGram: => Gram) |
| extends SpecifiedLengthCombinatorBase(e, eGram) { |
| |
| val kind = "Pattern" |
| |
| lazy val pattern = |
| try { |
| e.lengthPattern.r.pattern // imagine a really big expensive pattern to compile. |
| } catch { |
| case x: PatternSyntaxException => |
| e.SDE(x) |
| } |
| |
| if (!e.encodingInfo.isScannable && !(e.isSimpleType && e.primType == PrimType.HexBinary)) { |
| // lengthKind="pattern" requires scanability. However, xs:hexBinary types |
| // are not scannable, but we do allow pattern lengths if the encoding is |
| // ISO-8859-1. The ISO-8859-1 check is done elsewhere, so to allow pattern |
| // lengths, either this must be scannable or the type must be xs:hexBinary. |
| // Anything else is an error. |
| e.SDE("Element %s does not meet the requirements of Pattern-Based lengths and Scanability.\nThe element and its children must be representation='text' and share the same encoding.", e.diagnosticDebugName) |
| } |
| |
| override lazy val parser: Parser = new SpecifiedLengthPatternParser( |
| eParser, |
| e.elementRuntimeData, |
| pattern) |
| |
| // When unparsing, the pattern is not used to calculate a length, so just |
| // skip that parser and go straight to unparsing the string in the eUnparser |
| override lazy val unparser: Unparser = { |
| pattern |
| // force pattern just so we detect regex syntax errors even though |
| // we don't use the pattern when unparsing. |
| eUnparser |
| } |
| } |
| |
| trait SpecifiedLengthExplicitImplicitUnparserMixin { |
| |
| def e: ElementBase |
| def eUnparser: Unparser |
| |
| lazy val unparser: Unparser = { |
| val u = eUnparser |
| if (u.isEmpty) u |
| else |
| new SpecifiedLengthExplicitImplicitUnparser( |
| u, |
| e.elementRuntimeData, |
| e.unparseTargetLengthInBitsEv, |
| e.maybeUnparseTargetLengthInCharactersEv) |
| } |
| } |
| |
| class SpecifiedLengthExplicit(e: ElementBase, eGram: => Gram, bitsMultiplier: Int) |
| extends SpecifiedLengthCombinatorBase(e, eGram) |
| with SpecifiedLengthExplicitImplicitUnparserMixin { |
| |
| Assert.usage(bitsMultiplier > 0) |
| |
| lazy val kind = "Explicit_" + e.lengthUnits.toString |
| |
| lazy val parser: Parser = { |
| if (eParser.isEmpty) eParser |
| else new SpecifiedLengthExplicitParser( |
| eParser, |
| e.elementRuntimeData, |
| e.lengthEv, |
| bitsMultiplier) |
| } |
| |
| } |
| |
| class SpecifiedLengthImplicit(e: ElementBase, eGram: => Gram, nBits: Long) |
| extends SpecifiedLengthCombinatorBase(e, eGram) |
| with SpecifiedLengthExplicitImplicitUnparserMixin { |
| |
| lazy val kind = "Implicit_" + e.lengthUnits.toString |
| |
| lazy val toBits = 1 |
| |
| lazy val parser: Parser = new SpecifiedLengthImplicitParser( |
| eParser, |
| e.elementRuntimeData, |
| nBits) |
| |
| } |
| |
| class SpecifiedLengthPrefixed(e: ElementBase, eGram: => Gram, bitsMultiplier: Int) |
| extends SpecifiedLengthCombinatorBase(e, eGram) { |
| |
| Assert.usage(bitsMultiplier > 0) |
| |
| lazy val kind = "Prefixed_" + e.lengthUnits.toString |
| |
| private lazy val erd = e.elementRuntimeData |
| private lazy val plerd = e.prefixedLengthElementDecl.elementRuntimeData |
| private lazy val pladj = e.prefixedLengthAdjustmentInUnits |
| |
| lazy val parser: Parser = new SpecifiedLengthPrefixedParser( |
| eParser, |
| erd, |
| e.prefixedLengthBody.parser, |
| plerd, |
| e.lengthUnits, |
| pladj) |
| |
| lazy val unparser: Unparser = new SpecifiedLengthPrefixedUnparser( |
| eUnparser, |
| erd, |
| e.prefixedLengthBody.unparser, |
| plerd, |
| e.lengthUnits, |
| pladj) |
| } |
| |
| class SpecifiedLengthExplicitCharacters(e: ElementBase, eGram: => Gram) |
| extends SpecifiedLengthCombinatorBase(e, eGram) |
| with SpecifiedLengthExplicitImplicitUnparserMixin { |
| |
| val kind = "ExplicitCharacters" |
| |
| lazy val parser: Parser = new SpecifiedLengthExplicitCharactersParser( |
| eParser, |
| e.elementRuntimeData, |
| e.lengthEv) |
| } |
| |
| class SpecifiedLengthImplicitCharacters(e: ElementBase, eGram: => Gram, nChars: Long) |
| extends SpecifiedLengthCombinatorBase(e, eGram) |
| with SpecifiedLengthExplicitImplicitUnparserMixin { |
| |
| val kind = "ImplicitCharacters" |
| |
| lazy val parser: Parser = new SpecifiedLengthImplicitCharactersParser( |
| eParser, |
| e.elementRuntimeData, |
| nChars) |
| } |
| |
| class SpecifiedLengthPrefixedCharacters(e: ElementBase, eGram: => Gram) |
| extends SpecifiedLengthCombinatorBase(e, eGram) { |
| |
| val kind = "ExplicitCharacters" |
| |
| lazy val parser: Parser = new SpecifiedLengthPrefixedCharactersParser( |
| eParser, |
| e.elementRuntimeData, |
| e.prefixedLengthBody.parser, |
| e.prefixedLengthElementDecl.elementRuntimeData, |
| e.prefixedLengthAdjustmentInUnits) |
| |
| lazy val unparser: Unparser = Assert.nyi("unparsing with dfdl:lengthKind=\"prefixed\" and dfdl:lengthUnits=\"characters\"") |
| } |