Examples with Iterator java.util.Iterator used on opensource projects

Example 71 with Iterator

use of java.util.Iterator in project groovy-core by groovy.

the class Sequence method checkCollectionType.

// Implementation methods
//-------------------------------------------------------------------------
/**
     * Checks that each member of the given collection are of the correct
     * type
     */
protected void checkCollectionType(Collection c) {
    if (type != null) {
        for (Iterator iter = c.iterator(); iter.hasNext(); ) {
            Object element = iter.next();
            checkType(element);
        }
    }
}

Example 72 with Iterator

use of java.util.Iterator in project groovy-core by groovy.

the class IOGroovyMethods method iterator.

/**
     * Creates an iterator which will traverse through the reader a line at a time.
     *
     * @param self a Reader object
     * @return an Iterator for the Reader
     * @see java.io.BufferedReader#readLine()
     * @since 1.5.0
     */
public static Iterator<String> iterator(Reader self) {
    final BufferedReader bufferedReader;
    if (self instanceof BufferedReader)
        bufferedReader = (BufferedReader) self;
    else
        bufferedReader = new BufferedReader(self);
    return new Iterator<String>() {

        String nextVal;

        boolean nextMustRead = true;

        boolean hasNext = true;

        public boolean hasNext() {
            if (nextMustRead && hasNext) {
                try {
                    nextVal = readNext();
                    nextMustRead = false;
                } catch (IOException e) {
                    hasNext = false;
                }
            }
            return hasNext;
        }

        public String next() {
            String retval = null;
            if (nextMustRead) {
                try {
                    retval = readNext();
                } catch (IOException e) {
                    hasNext = false;
                }
            } else
                retval = nextVal;
            nextMustRead = true;
            return retval;
        }

        private String readNext() throws IOException {
            String nv = bufferedReader.readLine();
            if (nv == null)
                hasNext = false;
            return nv;
        }

        public void remove() {
            throw new UnsupportedOperationException("Cannot remove() from a Reader Iterator");
        }
    };
}

Example 73 with Iterator

use of java.util.Iterator in project groovy-core by groovy.

the class InvokerHelper method createMap.

public static Map createMap(Object[] values) {
    Map answer = new LinkedHashMap(values.length / 2);
    int i = 0;
    while (i < values.length - 1) {
        if ((values[i] instanceof SpreadMap) && (values[i + 1] instanceof Map)) {
            Map smap = (Map) values[i + 1];
            Iterator iter = smap.keySet().iterator();
            for (; iter.hasNext(); ) {
                Object key = iter.next();
                answer.put(key, smap.get(key));
            }
            i += 2;
        } else {
            answer.put(values[i++], values[i++]);
        }
    }
    return answer;
}

Example 74 with Iterator

use of java.util.Iterator in project groovy-core by groovy.

the class InvokerHelper method spreadMap.

public static SpreadMap spreadMap(Object value) {
    if (value instanceof Map) {
        Object[] values = new Object[((Map) value).keySet().size() * 2];
        int index = 0;
        Iterator it = ((Map) value).keySet().iterator();
        for (; it.hasNext(); ) {
            Object key = it.next();
            values[index++] = key;
            values[index++] = ((Map) value).get(key);
        }
        return new SpreadMap(values);
    }
    throw new SpreadMapEvaluatingException("Cannot spread the map " + value.getClass().getName() + ", value " + value);
}

Example 75 with Iterator

use of java.util.Iterator in project groovy-core by groovy.

the class FlatNodeListTraversal method process.

public AST process(AST t) {
    GroovySourceAST node = (GroovySourceAST) t;
    // fetch all the nodes in this AST into a List
    NodeCollector collector = new NodeCollector();
    AntlrASTProcessor internalTraversal = new PreOrderTraversal(collector);
    internalTraversal.process(t);
    List listOfAllNodesInThisAST = collector.getNodes();
    // process each node in turn
    setUp(node);
    Iterator itr = listOfAllNodesInThisAST.iterator();
    while (itr.hasNext()) {
        GroovySourceAST currentNode = (GroovySourceAST) itr.next();
        accept(currentNode);
    }
    tearDown(node);
    return null;
}