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The PDS3 Product Tools Library project supports design/generation, validation and submission of archival products to the PDS. This project consists of a library of software classes to support the development of tools to perform these functions and is designed to be utilized by developers from the Engineering Node, Discipline Nodes and the PDS community.
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// Copyright 2019, California Institute of Technology ("Caltech").
// U.S. Government sponsorship acknowledged.
//
// 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 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 Caltech nor its operating division, the Jet Propulsion
// Laboratory, 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 gov.nasa.pds.tools.label;
import java.io.File;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import gov.nasa.arc.pds.tools.util.StrUtils;
import gov.nasa.arc.pds.tools.util.URLUtils;
import gov.nasa.pds.tools.LabelParserException;
import gov.nasa.pds.tools.constants.Constants.ProblemType;
import gov.nasa.pds.tools.dict.DictIdentifier;
import gov.nasa.pds.tools.dict.parser.DictIDFactory;
/**
* This class represents a PDS label.
*
* @author pramirez
* @author jagander
* @version $Revision$
*
*/
public class Label {
// able to be parsed as label
private boolean valid = true;
private LinkedHashMap> statements;
// may have source URL or file but not both
private final URI labelURI;
private final File labelFile;
private String labelPath;
// used to determine if problems should be captured. This is turned off for
// included files since they are evaluated separately. However, since
// circular pointer problems will always be swallowed, that type is
// exempted.
// TODO: figure out how to suppress circular ref problem when you intended
// to capture no problems at all
private boolean captureProblems = true;
// Used to determine whether or not problems whose source is a different
// label should be allowed to be captured in this label. By default this is
// turned off as it can lead to double reporting of problems in the cases
// where the referenced statements are included more than once or parsed
// independently. Use caution when setting this flag to true as filtering of
// problems would then need to be done at a higher level.
private boolean allowExternalProblems = false;
// Start byte of attached content if any was found. Note that this may be
// inaccurate if data started with whitespace.
private Integer attachedStartByte;
// Whether or not blank space was found after END line. Used to determine
// line length checking behavior. May not be entirely accurate and is
// currently used in conjunction with a check to see how similar line
// lengths are.
private boolean hasBlankFill = false;
private final List problems = new ArrayList();
private final List ancestorPaths = new ArrayList();
// indication as to whether label terminates with END statement. It should
// not if it's a label fragment. Note that this is not impacted by attached
// content following the END statement.
private boolean hasEndStatement = false;
public static class LineLength {
int line;
int length;
public LineLength(int line, int length) {
this.line = line;
this.length = length;
}
public int getLine() {
return this.line;
}
public int getLength() {
return this.length;
}
}
private List lineLengths = new ArrayList();
public void setCaptureProblems(final boolean captureProblems) {
this.captureProblems = captureProblems;
}
public boolean getCaptureProblems() {
return this.captureProblems;
}
public void setAllowExternalProblems(final boolean allowExternalProblems) {
this.allowExternalProblems = allowExternalProblems;
}
public boolean getAllowExternalProblems() {
return this.allowExternalProblems;
}
public void setHasBlankFill(final boolean hasBlankFill) {
this.hasBlankFill = hasBlankFill;
}
/**
* Constructs an object representation of a PDS label.
*
*/
public Label(final URI labelURI) {
this.statements = new LinkedHashMap>();
this.labelURI = labelURI;
if (labelURI != null) {
this.labelPath = labelURI.toString();
}
this.labelFile = null;
}
public Label(final File labelFile) {
this.statements = new LinkedHashMap>();
this.labelURI = null;
this.labelFile = labelFile;
if (labelFile != null) {
this.labelPath = labelFile.toString();
}
}
public boolean isValid() {
return this.valid;
}
public void setInvalid() {
this.valid = false;
}
public void setAttachedStartByte(final Integer startByte) {
this.attachedStartByte = startByte;
}
public long getAttachedStartByte() {
return this.attachedStartByte;
}
public boolean hasAttachedContent() {
return this.attachedStartByte != null;
}
public String getLabelPath() {
return this.labelPath;
}
// should only be used when you don't have a statement since statements
// retain knowledge of their source file and we don't want to double report
// an error when statements are imported
public void addProblem(final int lineNumber, final String key,
final ProblemType type, final Object... arguments) {
addProblem(this.labelURI, lineNumber, null, key, type, arguments);
}
public void addProblem(final int lineNumber, final Integer column,
final String key, final ProblemType type, final Object... arguments) {
addProblem(this.labelURI, lineNumber, column, key, type, arguments);
}
public void addProblem(final Statement statement, final String key,
final ProblemType type, final Object... arguments) {
addProblem(statement, null, key, type, arguments);
}
public void addProblem(final Statement statement, final Integer column,
final String key, final ProblemType type, final Object... arguments) {
if (statement.getSourceFile() != null) {
final LabelParserException e = new LabelParserException(statement, column,
key, type, arguments);
if (((this.allowExternalProblems
|| this.labelFile.equals(statement.getSourceFile()))
&& this.captureProblems)
|| e.getType().equals(ProblemType.CIRCULAR_POINTER_REF)) {
addProblemLocal(e);
}
} else {
if (this.captureProblems) {
if (this.labelURI == null
|| this.labelURI.equals(statement.getSourceURI())) {
final LabelParserException e = new LabelParserException(statement,
column, key, type, arguments);
addProblemLocal(e);
} else if (this.allowExternalProblems) {
final LabelParserException e = new LabelParserException(statement,
column, key, type, arguments);
addProblemLocal(e);
}
}
}
}
public void addProblem(final URI sourceURI, final int lineNumber,
final Integer column, final String key, final ProblemType type,
final Object... arguments) {
if (this.captureProblems) {
if (this.labelURI == null || this.labelURI.equals(sourceURI)) {
final LabelParserException e = new LabelParserException(this,
lineNumber, column, key, type, arguments);
addProblemLocal(e);
} else if (this.allowExternalProblems) {
final LabelParserException e = new LabelParserException(sourceURI,
lineNumber, column, key, type, arguments);
addProblemLocal(e);
}
}
}
public void addProblem(final File sourceFile, final int lineNumber,
final Integer column, final String key, final ProblemType type,
final Object... arguments) {
final LabelParserException e = new LabelParserException(this, lineNumber,
column, key, type, arguments);
addProblem(sourceFile, e);
}
// for internal use so you can skip the test against the lpe source file or
// url
private void addProblemLocal(final LabelParserException e) {
this.problems.add(e);
}
// try to only use when exception has context
public void addProblem(final LabelParserException e) {
// if capture problems and (same context add or allowing external
// problems) else, if non-suppresable error, pass through anyway
if (this.captureProblems
&& ((this.labelFile != null && (this.allowExternalProblems
|| this.labelFile.equals(e.getSourceFile())))
|| (this.labelURI != null && (this.allowExternalProblems
|| this.labelURI.equals(e.getSourceURI()))))) {
this.problems.add(e);
} else if (e.getType().equals(ProblemType.CIRCULAR_POINTER_REF)) {
this.problems.add(e);
}
}
public void addProblem(final URI sourceURI, final LabelParserException e) {
if (((this.allowExternalProblems || this.labelURI.equals(sourceURI))
&& this.captureProblems)
|| e.getType().equals(ProblemType.CIRCULAR_POINTER_REF)) {
addProblemLocal(e);
}
}
public void addProblem(final File sourceFile, final LabelParserException e) {
if (((this.allowExternalProblems || this.labelFile.equals(sourceFile))
&& this.captureProblems)
|| e.getType().equals(ProblemType.CIRCULAR_POINTER_REF)) {
addProblemLocal(e);
}
}
public void addProblem(final Statement statement,
final LabelParserException e) {
if (statement.getSourceURI() != null) {
addProblem(statement.getSourceURI(), e);
} else {
addProblem(statement.getSourceFile(), e);
}
}
/**
* Retrieves a statement with the identifier
*
* @param identifier
* Identifies the statement(s) to retrieve
* @return The named statement or null if not found
*/
public List getStatement(final DictIdentifier identifier) {
return this.statements.get(identifier);
}
private Statement getElement(final DictIdentifier key) {
if (key != null) {
List foundStatements = this.statements.get(key);
if (foundStatements != null && foundStatements.size() > 0) {
return foundStatements.get(0);
}
}
return null;
}
private List getElements(final DictIdentifier key) {
List foundStatements = this.statements.get(key);
if (foundStatements == null) {
foundStatements = new ArrayList();
}
return foundStatements;
}
private List getElements(final Class classType) {
final List returnStatements = new ArrayList();
for (List stmts : this.statements.values()) {
for (Statement statement : stmts) {
if (statement.getClass().equals(classType)) {
returnStatements.add(statement);
}
}
}
return returnStatements;
}
/**
* Retrieves the attribute with the identifier or null if not found
*
* @param identifier
* of attribute to find
* @return attribute or null
*/
public AttributeStatement getAttribute(String identifier) {
DictIdentifier id = DictIDFactory.createElementDefId(identifier);
return (AttributeStatement) getElement(id);
}
/**
* Retrieves the groups with the identifier or null if not found
*
* @param identifier
* of group to find
* @return {@link List} of {@link GroupStatement}
*/
@SuppressWarnings("unchecked")
public List getGroups(String identifier) {
DictIdentifier id = DictIDFactory.createGroupDefId(identifier);
return (List) getElements(id);
}
/**
* Retrieves the object with the identifier or null if not found
*
* @param identifier
* of object to find
* @return {@link List} of {@link ObjectStatement}
*/
@SuppressWarnings("unchecked")
public List getObjects(String identifier) {
DictIdentifier id = DictIDFactory.createObjectDefId(identifier);
return (List) getElements(id);
}
/**
* Retrieves the statements associated with this label
*
* @return {@link List} of {@link Statement}
*/
public List getStatements() {
List results = new ArrayList();
for (List stmts : this.statements.values()) {
results.addAll(stmts);
}
return results;
}
/**
* Retrieves objects associated with this label
*
* @return List of {@link ObjectStatement}
*/
@SuppressWarnings("unchecked")
public List getObjects() {
return (List) getElements(ObjectStatement.class);
}
/**
* Retrieves groups associated with this label
*
* @return list of {@link GroupStatement}
*/
@SuppressWarnings("unchecked")
public List getGroups() {
return (List) getElements(GroupStatement.class);
}
/**
* Retrieves attributes associated with this label
*
* @return list of {@link AttributeStatement}
*/
@SuppressWarnings("unchecked")
public List getAttributes() {
return (List) getElements(AttributeStatement.class);
}
/**
* Retrieves pointers associated with this label
*
* @return list of {@link PointerStatement}
*/
public List getPointers() {
List returnPointers = new ArrayList();
for (List stmts : this.statements.values()) {
for (Statement statement : stmts) {
if (statement instanceof PointerStatement) {
returnPointers.add((PointerStatement) statement);
}
}
}
return returnPointers;
}
/**
* Associates a statement with this label
*
* @param statement
* to be added to label
*/
public synchronized void addStatement(Statement statement) {
List stmnts = this.statements.get(statement.getIdentifier());
if (stmnts == null) {
stmnts = new ArrayList();
this.statements.put(statement.getIdentifier(), stmnts);
}
if (statement instanceof IncludePointer) {
stmnts.add(statement);
for (Statement stmt : ((IncludePointer) statement).getStatements()) {
addStatement(stmt);
}
} else {
stmnts.add(statement);
}
}
public List getProblems() {
return this.problems;
}
public void addAncestor(final String path) {
if (!this.ancestorPaths.contains(path)) {
this.ancestorPaths.add(path);
}
}
public void addAncestors(final List pointers) {
for (final String pointer : pointers) {
addAncestor(pointer);
}
}
public boolean hasAncestor(final URI pointer) {
if (pointer.equals(this.labelURI)) {
return true;
}
return this.ancestorPaths.contains(pointer.toString());
}
public boolean hasAncestor(final File pointer) {
if (pointer.equals(this.labelFile)) {
return true;
}
return this.ancestorPaths.contains(pointer.toString());
}
public boolean hasIncludePointer(final String path) {
return this.ancestorPaths.contains(path);
}
public List getAncestors() {
return this.ancestorPaths;
}
public URI getLabelURI() {
return this.labelURI;
}
public File getLabelFile() {
return this.labelFile;
}
public String getSourceString() {
if (this.labelFile != null) {
return this.labelFile.toString();
}
return this.labelURI.toString();
}
public String getSourceNameString() {
if (this.labelFile != null) {
return this.labelFile.getName();
}
return URLUtils.getFileName(this.labelURI);
}
/**
* Remember a line length for a line within a label. The line length includes
* the line terminator.
*
* @param line
* the line number for which we found a length
* @param length
* the line length found
*/
public void addLineLength(int line, int length) {
this.lineLengths.add(new LineLength(line, length));
}
/**
* Return the line lengths for all label lines.
*
* @return a list of the line lengths found
*/
public List getLineLengths() {
return this.lineLengths;
}
// TODO: make separate check for existence of attached content when internal
// pointer because A) pointer resolution is encapsulated elsewhere and B)
// this handles only the start of all attached content, not each section (ie
// if there is a header section AND a data section)
public void checkLineLengths() {
// type (fixed vs stream || variable) required to determine checking
// behavior
String recordType = null;
Integer recordBytes = null;
AttributeStatement typeAttribute = getAttribute("RECORD_TYPE"); //$NON-NLS-1$
if (typeAttribute != null) {
final Value type = typeAttribute.getValue();
if (type != null) {
recordType = type.toString().trim().toUpperCase();
}
// record bytes required for fixed length records to check length
if ("FIXED_LENGTH".equals(recordType)) { //$NON-NLS-1$
AttributeStatement byteAttribute = getAttribute("RECORD_BYTES"); //$NON-NLS-1$
if (byteAttribute != null) {
final Value bytesValue = byteAttribute.getValue();
if (bytesValue != null) {
recordBytes = StrUtils.getNumberLoose(bytesValue.toString())
.intValue();
}
}
// error and stop line eval if no value found
if (recordBytes == null) {
// TODO: is MISSING_MEMBER the right error type? not
// technically a child property but is required to make
// sense of value
addProblem(typeAttribute.getLineNumber(),
"parser.error.missingRecordBytes", //$NON-NLS-1$
ProblemType.MISSING_MEMBER);
}
}
}
// only do special check if attached content found, surfaces as missing
// pointer target if has internal pointer but no attached content
if (hasAttachedContent() && recordBytes != null) {
// get first internal pointer to check where attached content starts
final PointerStatement internalPointer = getLowestInternalPointer(
recordBytes);
// if has internal pointer - get lowest value internal pointer
if (internalPointer != null) {
// resolve pointer to bytes if not already
Numeric startPos = (Numeric) internalPointer.getValue();
int startByte = getStartByte(startPos, recordBytes);
// report if actual start byte and pointer claimed start byte
// don't agree
int foundStartByte = this.attachedStartByte.intValue();
if (startByte > foundStartByte) {
addProblem(internalPointer.getLineNumber(),
"parser.error.startByteMismatch", //$NON-NLS-1$
ProblemType.ATTACHED_START_BYTE_MISMATCH, this.attachedStartByte,
startByte);
} else if (startByte < foundStartByte) {
// if found start is after listed, might be that data starts
// with whitespace
addProblem(internalPointer.getLineNumber(),
"parser.warning.startBytePossibleMismatch", //$NON-NLS-1$
ProblemType.START_BYTE_POSSIBLE_MISMATCH, this.attachedStartByte,
startByte);
}
// recommended line length is only ignored for line padding
if ("FIXED_LENGTH".equals(recordType) //$NON-NLS-1$
&& (!this.hasBlankFill || linesSimilar())) {
checkGivenLineLengths(recordBytes);
} else {
checkDefaultLineLengths();
}
} else {
// no internal pointer, data should just follow assume stream
// since fixed would require a start record and record bytes
// TODO: this correct?
checkDefaultLineLengths();
}
} else {
checkDefaultLineLengths();
}
}
// Necessary alternate test for having blank fill since data could start
// with whitespace or lines could be variable even with no fill by
// coincidence. Currently calling 50% same good enough.
private boolean linesSimilar() {
final Map frequencies = new HashMap();
for (LineLength l : getLineLengths()) {
Integer key = l.getLength();
if (frequencies.containsKey(key)) {
Integer found = frequencies.get(key);
frequencies.put(key, found + 1);
} else {
frequencies.put(key, 1);
}
}
Integer maxFound = 0;
for (Iterator> it = frequencies.entrySet()
.iterator(); it.hasNext();) {
Entry entry = it.next();
if (entry.getValue().intValue() > maxFound.intValue()) {
maxFound = entry.getValue();
}
}
final boolean similar = (maxFound.doubleValue()
/ getLineLengths().size()) > .5;
return similar;
}
// Verify that all line lengths <= 78 (excl CR LF).
private void checkDefaultLineLengths() {
for (LineLength l : getLineLengths()) {
if (l.getLength() > 78) {
addProblem(l.getLine(), "parser.error.lineTooLong", //$NON-NLS-1$
ProblemType.EXCESSIVE_LINE_LENGTH, l.getLength());
}
}
}
private void checkGivenLineLengths(int recordBytes) {
for (LineLength l : getLineLengths()) {
if ((l.getLength() + 2) != recordBytes) {
addProblem(l.getLine(), "parser.error.wrongLineLength", //$NON-NLS-1$
ProblemType.WRONG_LINE_LENGTH, recordBytes - 2, l.getLength());
}
}
}
private PointerStatement getLowestInternalPointer(final Integer recordBytes) {
Long lowWaterMark = null;
PointerStatement lowest = null;
for (final PointerStatement pointer : this.getPointers()) {
final Value value = pointer.getValue();
if (value instanceof Numeric) {
long start = getStartByte((Numeric) value, recordBytes);
if (lowWaterMark == null || start < lowWaterMark.longValue()) {
lowWaterMark = start;
lowest = pointer;
}
}
}
return lowest;
}
// duplicated functionality since slightly different requirements in
// behavior from getSkipBytes()
private Integer getStartByte(final Numeric startPosition,
final Integer recordBytes) {
if (startPosition == null || startPosition.getValue().equals("0")) { //$NON-NLS-1$
return null;
}
final String units = startPosition.getUnits();
final String number = startPosition.getValue();
Integer numericValue = StrUtils.getNumberLoose(number).intValue();
if (numericValue < 0) {
// TODO: error that needs to be positive?
return null;
}
if ("bytes".equalsIgnoreCase(units) || "".equalsIgnoreCase(units)) { //$NON-NLS-1$ //$NON-NLS-2$
return numericValue;
}
if (recordBytes == null) {
return null;
}
// start at beginning of record so subtract 1 from records, add 1 byte
// back to indicate that it starts on that byte, not before it
return (numericValue - 1) * recordBytes + 1;
}
public static long getSkipBytes(Label label, Numeric startPosition) {
long startByte = 0;
if (startPosition == null) {
return 0;
}
final String units = startPosition.getUnits();
final String number = startPosition.getValue();
long numericValue = StrUtils.getNumberLoose(number).longValue();
// modify it to be what you want to skip rather than first byte...
// TODO: this the right way to handle?
numericValue = Math.max(0, numericValue - 1);
if ("bytes".equalsIgnoreCase(units) || "".equalsIgnoreCase(units)) { //$NON-NLS-1$ //$NON-NLS-2$
return numericValue;
}
// TODO: support non-fixed-length records, not sure how yet
// label.getAttribute("RECORD_TYPE").getValue().toString().equalsIgnoreCase("FIXED_LENGTH");
AttributeStatement attribute = label.getAttribute("RECORD_BYTES"); //$NON-NLS-1$
if (attribute != null) {
final String bytesString = attribute.getValue().toString();
startByte = StrUtils.getNumberLoose(bytesString).longValue()
* numericValue;
startByte = Math.max(0, startByte);
}
return startByte;
}
public void setHasEndStatement() {
this.hasEndStatement = true;
}
public boolean hasEndStatement() {
return this.hasEndStatement;
}
@SuppressWarnings("nls")
@Override
public String toString() {
return StrUtils.getNonNull(this.labelFile, this.labelURI) + " "
+ this.problems.size() + " problems and " + this.statements.size()
+ " statements";
}
}