Example usage for java.util ListIterator hasPrevious

Introduction

In this page you can find the example usage for java.util ListIterator hasPrevious.

Prototype

boolean hasPrevious();

Source Link

Document

Returns true if this list iterator has more elements when traversing the list in the reverse direction.

Usage

From source file:uk.ac.ucl.excites.sapelli.storage.eximport.csv.CSVRecordsImporter.java

private void parseHeaderRow(String row) throws Exception {
    // Check row length:
    if (row.isEmpty())
        throw new IllegalArgumentException("Header row cannot be null");

    // Get separator by reading last char of the header:
    try {//from ww  w  .ja  v a  2 s .co  m
        separator = Separator.getSeparator(row.charAt(row.length() - 1));
    } catch (IllegalArgumentException iae) {
        separator = CSVRecordsExporter.DEFAULT_SEPARATOR;
        addWarning("Header row does no contain separator hint, trying to parse file using default separator ("
                + separator.toString() + ").");
    }

    // Split header row:
    List<String> headers = splitRow(row);

    // Parse attribute headers:
    Long modelID = null;
    Integer modelSchemaNo = null;
    String schemaName = null;
    try {
        ListIterator<String> headerIter = headers.listIterator(headers.size());
        String attributeHeader;
        int equalsPos;
        //   Iterate over headers back to front until we hit one without '=':
        while (headerIter.hasPrevious()
                && (equalsPos = (attributeHeader = headerIter.previous()).indexOf('=')) != -1) {
            switch (attributeHeader.substring(0, equalsPos)) {
            case Schema.ATTRIBUTE_MODEL_ID:
                modelID = Long.valueOf(attributeHeader.substring(equalsPos + 1));
                break;
            case Schema.ATTRIBUTE_MODEL_SCHEMA_NUMBER:
                modelSchemaNo = Integer.valueOf(attributeHeader.substring(equalsPos + 1));
                break;
            case Schema.ATTRIBUTE_SCHEMA_NAME:
                schemaName = deescapeAndUnquote(attributeHeader.substring(equalsPos + 1));
                break;
            case Exporter.ATTRIBUTE_EXPORTED_AT:
                try {
                    exportedAt = new TimeStamp(Exporter.ExportedAtFormatter.withOffsetParsed()
                            .parseDateTime(attributeHeader.substring(equalsPos + 1)));
                } catch (Exception e) {
                    addWarning(
                            "Error upon parsing exportedAt time: " + attributeHeader.substring(equalsPos + 1));
                }
                break;
            default:
                addWarning("Ignored unrecognised attribute header: " + attributeHeader);
            }
            // Remove attribute header:
            headerIter.remove();
        }
    } catch (Exception e) {
        // don't throw here
        client.logWarning("Error upon parsing CSV attribute header: " + ExceptionHelpers.getMessageAndCause(e));
    }

    // Get schema:
    if (modelID != null && modelSchemaNo != null) {
        Schema headerSchema = null;
        try {
            headerSchema = client.getSchema(modelID, modelSchemaNo, schemaName);
        } catch (Exception e) {
            if (schema != null)
                addWarning("Could not find schema: " + e.getMessage() + ". Using fallback schema ("
                        + schema.toString() + ").");
            else
                throw e;
        }
        if (schema != null && !headerSchema.equals(schema))
            addWarning("CSV schema (" + headerSchema.toString() + ") is different from given fallback schema ("
                    + schema.toString() + ").");
        schema = headerSchema; // !!!
    } else {
        String error = "No (readable) model/schema information in header!";
        if (schema != null)
            addWarning(error + " Using fallback schema (" + schema.toString() + ").");
        else
            throw new Exception("Could not find model/schema information in header!");
    }

    if (schema != null) {
        // Parse column headers:
        List<ColumnPointer<?>> headerColumnPointers = new ArrayList<ColumnPointer<?>>(headers.size());
        for (String columnHeader : headers) // (the remaining headers should all be qualified column names)
            headerColumnPointers.add(ColumnPointer.ByName(schema, columnHeader, false, false));
        // if we get her nothing went wrong above:
        this.columnPointers = headerColumnPointers;
    }
}

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From source file:org.cloudata.core.common.conf.CloudataConf.java

private void loadResources(Properties props, ArrayList resources, boolean reverse, boolean quiet) {
    ListIterator i = resources.listIterator(reverse ? resources.size() : 0);
    while (reverse ? i.hasPrevious() : i.hasNext()) {
        loadResource(props, reverse ? i.previous() : i.next(), quiet);
    }//from w  w  w.  ja  va2  s. c o  m
}

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From source file:mekhq.Utilities.java

public static Map<String, Integer> sortMapByValue(Map<String, Integer> unsortMap, boolean highFirst) {

    // Convert Map to List
    List<Map.Entry<String, Integer>> list = new LinkedList<Map.Entry<String, Integer>>(unsortMap.entrySet());

    // Sort list with comparator, to compare the Map values
    Collections.sort(list, new Comparator<Map.Entry<String, Integer>>() {
        @Override/*from   ww  w  .j  ava 2  s. c  om*/
        public int compare(Map.Entry<String, Integer> o1, Map.Entry<String, Integer> o2) {
            return (o1.getValue()).compareTo(o2.getValue());
        }
    });

    // Convert sorted map back to a Map
    Map<String, Integer> sortedMap = new LinkedHashMap<String, Integer>();
    if (highFirst) {
        ListIterator<Map.Entry<String, Integer>> li = list.listIterator(list.size());
        while (li.hasPrevious()) {
            Map.Entry<String, Integer> entry = li.previous();
            sortedMap.put(entry.getKey(), entry.getValue());
        }
    } else {
        for (Iterator<Map.Entry<String, Integer>> it = list.iterator(); it.hasNext();) {
            Map.Entry<String, Integer> entry = it.next();
            sortedMap.put(entry.getKey(), entry.getValue());
        }
    }

    return sortedMap;
}

---

From source file:chat.viska.commons.pipelines.Pipeline.java

private void processException(ListIterator<Map.Entry<String, Pipe>> iterator, Exception cause,
        boolean isReading) {
    while (isReading ? iterator.hasNext() : iterator.hasPrevious()) {
        final Pipe pipe = isReading ? iterator.next().getValue() : iterator.previous().getValue();
        try {/* ww w  .  j  a  v a  2  s.  com*/
            if (isReading) {
                pipe.catchInboundException(this, cause);
            } else {
                pipe.catchOutboundException(this, cause);
            }
            return;
        } catch (Exception rethrown) {
            cause = rethrown;
        }
    }
    triggerEvent(new ExceptionCaughtEvent(this, cause));
}

---

From source file:org.apache.atlas.model.typedef.AtlasStructDef.java

public void setAttributeDefs(List<AtlasAttributeDef> attributeDefs) {
    if (this.attributeDefs != null && this.attributeDefs == attributeDefs) {
        return;//from   w  ww . j a va  2  s.com
    }

    if (CollectionUtils.isEmpty(attributeDefs)) {
        this.attributeDefs = new ArrayList<>();
    } else {
        // if multiple attributes with same name are present, keep only the last entry
        List<AtlasAttributeDef> tmpList = new ArrayList<>(attributeDefs.size());
        Set<String> attribNames = new HashSet<>();

        ListIterator<AtlasAttributeDef> iter = attributeDefs.listIterator(attributeDefs.size());
        while (iter.hasPrevious()) {
            AtlasAttributeDef attributeDef = iter.previous();
            String attribName = attributeDef != null ? attributeDef.getName() : null;

            if (attribName != null) {
                attribName = attribName.toLowerCase();

                if (!attribNames.contains(attribName)) {
                    tmpList.add(new AtlasAttributeDef(attributeDef));

                    attribNames.add(attribName);
                }
            }
        }
        Collections.reverse(tmpList);

        this.attributeDefs = tmpList;
    }
}

---

From source file:org.apache.cayenne.access.DbGenerator.java

/**
 * Executes a set of commands to drop/create database objects. This is the
 * main worker method of DbGenerator. Command set is built based on
 * pre-configured generator settings.//from   www .  j  a v a 2s .co m
 */
public void runGenerator(DataSource ds) throws Exception {
    this.failures = null;

    try (Connection connection = ds.getConnection();) {

        // drop tables
        if (shouldDropTables) {
            ListIterator<DbEntity> it = dbEntitiesInInsertOrder.listIterator(dbEntitiesInInsertOrder.size());
            while (it.hasPrevious()) {
                DbEntity ent = it.previous();
                for (String statement : dropTables.get(ent.getName())) {
                    safeExecute(connection, statement);
                }
            }
        }

        // create tables
        List<String> createdTables = new ArrayList<>();
        if (shouldCreateTables) {
            for (final DbEntity ent : dbEntitiesInInsertOrder) {

                // only create missing tables

                safeExecute(connection, createTables.get(ent.getName()));
                createdTables.add(ent.getName());
            }
        }

        // create FK
        if (shouldCreateTables && shouldCreateFKConstraints) {
            for (DbEntity ent : dbEntitiesInInsertOrder) {

                if (createdTables.contains(ent.getName())) {
                    List<String> fks = createConstraints.get(ent.getName());
                    for (String fk : fks) {
                        safeExecute(connection, fk);
                    }
                }
            }
        }

        // drop PK
        if (shouldDropPKSupport) {
            List<String> dropAutoPKSQL = getAdapter().getPkGenerator()
                    .dropAutoPkStatements(dbEntitiesRequiringAutoPK);
            for (final String sql : dropAutoPKSQL) {
                safeExecute(connection, sql);
            }
        }

        // create pk
        if (shouldCreatePKSupport) {
            List<String> createAutoPKSQL = getAdapter().getPkGenerator()
                    .createAutoPkStatements(dbEntitiesRequiringAutoPK);
            for (final String sql : createAutoPKSQL) {
                safeExecute(connection, sql);
            }
        }

        new DbGeneratorPostprocessor().execute(connection, getAdapter());
    }
}

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From source file:org.apache.cloudstack.api.response.QuotaResponseBuilderImpl.java

@Override
public QuotaBalanceResponse createQuotaBalanceResponse(List<QuotaBalanceVO> quotaBalance, Date startDate,
        Date endDate) {//w  ww .  j a  va  2 s.  c  o m
    if (quotaBalance == null || quotaBalance.isEmpty()) {
        throw new InvalidParameterValueException("The request period does not contain balance entries.");
    }
    Collections.sort(quotaBalance, new Comparator<QuotaBalanceVO>() {
        public int compare(QuotaBalanceVO o1, QuotaBalanceVO o2) {
            o1 = o1 == null ? new QuotaBalanceVO() : o1;
            o2 = o2 == null ? new QuotaBalanceVO() : o2;
            return o2.getUpdatedOn().compareTo(o1.getUpdatedOn()); // desc
        }
    });

    boolean have_balance_entries = false;
    //check that there is at least one balance entry
    for (Iterator<QuotaBalanceVO> it = quotaBalance.iterator(); it.hasNext();) {
        QuotaBalanceVO entry = it.next();
        if (entry.isBalanceEntry()) {
            have_balance_entries = true;
            break;
        }
    }
    //if last entry is a credit deposit then remove that as that is already
    //accounted for in the starting balance after that entry, note the sort is desc
    if (have_balance_entries) {
        ListIterator<QuotaBalanceVO> li = quotaBalance.listIterator(quotaBalance.size());
        // Iterate in reverse.
        while (li.hasPrevious()) {
            QuotaBalanceVO entry = li.previous();
            if (s_logger.isDebugEnabled()) {
                s_logger.debug("createQuotaBalanceResponse: Entry=" + entry);
            }
            if (entry.getCreditsId() > 0) {
                li.remove();
            } else {
                break;
            }
        }
    }

    int quota_activity = quotaBalance.size();
    QuotaBalanceResponse resp = new QuotaBalanceResponse();
    BigDecimal lastCredits = new BigDecimal(0);
    boolean consecutive = true;
    for (Iterator<QuotaBalanceVO> it = quotaBalance.iterator(); it.hasNext();) {
        QuotaBalanceVO entry = it.next();
        if (s_logger.isDebugEnabled()) {
            s_logger.debug("createQuotaBalanceResponse: All Credit Entry=" + entry);
        }
        if (entry.getCreditsId() > 0) {
            if (consecutive) {
                lastCredits = lastCredits.add(entry.getCreditBalance());
            }
            resp.addCredits(entry);
            it.remove();
        } else {
            consecutive = false;
        }
    }

    if (quota_activity > 0 && quotaBalance.size() > 0) {
        // order is desc last item is the start item
        QuotaBalanceVO startItem = quotaBalance.get(quotaBalance.size() - 1);
        QuotaBalanceVO endItem = quotaBalance.get(0);
        resp.setStartDate(startDate);
        resp.setStartQuota(startItem.getCreditBalance());
        resp.setEndDate(endDate);
        if (s_logger.isDebugEnabled()) {
            s_logger.debug("createQuotaBalanceResponse: Start Entry=" + startItem);
            s_logger.debug("createQuotaBalanceResponse: End Entry=" + endItem);
        }
        resp.setEndQuota(endItem.getCreditBalance().add(lastCredits));
    } else if (quota_activity > 0) {
        // order is desc last item is the start item
        resp.setStartDate(startDate);
        resp.setStartQuota(new BigDecimal(0));
        resp.setEndDate(endDate);
        resp.setEndQuota(new BigDecimal(0).add(lastCredits));
    } else {
        resp.setStartDate(startDate);
        resp.setEndDate(endDate);
        resp.setStartQuota(new BigDecimal(0));
        resp.setEndQuota(new BigDecimal(0));
    }
    resp.setCurrency(QuotaConfig.QuotaCurrencySymbol.value());
    resp.setObjectName("balance");
    return resp;
}

---

From source file:com.edgenius.wiki.render.macro.BaseMacro.java

/**
 * Move Iterator cursor backward or forward to given node. You must ensure then direction is correct! 
 * This location will only following "forward inertia". <br>
 * "Inertia" means, if iterator goes previous, then next, the same cursor will return, likewise in next->previous.
 * (see {@link com.edgenius.wiki.gwt.client.html.TestHTMLNodeContainer#testIteratorAdd()}) <br>
 * /*from w ww .  j av  a2  s. com*/
 * This method will if call next(), it already return next HTMNode from current cursor. But if call previous(), 
 * it returns current cursor at first time. 
 *  
 * @param node
 * @param iter
 * @param forward
 */
protected void moveIteratorCursorTo(HTMLNode node, ListIterator<HTMLNode> iter, boolean forward) {
    if (forward) {
        if (iter.hasNext()) {
            HTMLNode cursor = iter.next();
            if (cursor.previous() != node) { //this is just ensure, iter current position is not equals with given node 
                while (cursor != node && iter.hasNext()) {
                    cursor = iter.next();
                }
            }
        }
    } else {
        //backward
        if (iter.hasPrevious()) {
            HTMLNode cursor = iter.previous();
            if (cursor.next() != node) { //this is just ensure, iter current position is not equals with given node 
                while (cursor != node && iter.hasPrevious()) {
                    cursor = iter.previous();
                }
            }
            //delete inertia
            iter.next();
        }
    }
}

---

From source file:arun.com.chromer.webheads.WebHeadService.java

private void selectNextMaster() {
    final ListIterator<String> it = new ArrayList<>(webHeads.keySet()).listIterator(webHeads.size());
    //noinspection LoopStatementThatDoesntLoop
    while (it.hasPrevious()) {
        final String key = it.previous();
        final WebHead toBeMaster = webHeads.get(key);
        if (toBeMaster != null) {
            toBeMaster.setMaster(true);// w w  w.  j a v  a  2  s . c o m
            updateSpringChain();
            toBeMaster.goToMasterTouchDownPoint();
        }
        break;
    }
}

---

From source file:com.quigley.filesystem.FilesystemPath.java

public FilesystemPath simplify() {
    List<String> elementsCopy = new ArrayList<String>(elements);
    ListIterator<String> i = elementsCopy.listIterator();
    boolean saw = false;
    while (i.hasNext()) {
        String value = i.next();//from   ww  w  . ja  v a 2 s.co  m
        if (value.equals(".")) {
            i.remove();
        } else if (value.equals("..")) {
            if (saw) {
                if (i.hasPrevious()) {
                    i.remove();
                    i.previous();
                    i.remove();
                }
            }
        } else {
            saw = true;
        }
    }
    FilesystemPath pathCopy = new FilesystemPath(elementsCopy);
    pathCopy.isAbsolute = isAbsolute;

    return pathCopy;
}

---

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