Example usage for java.lang.reflect Array get

List of usage examples for java.lang.reflect Array get

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Introduction

In this page you can find the example usage for java.lang.reflect Array get.

Prototype

public static native Object get(Object array, int index)
        throws IllegalArgumentException, ArrayIndexOutOfBoundsException;

Source Link

Document

Returns the value of the indexed component in the specified array object.

Usage

From source file:org.dcm4che3.conf.core.misc.DeepEquals.java

/**
 * Get a deterministic hashCode (int) value for an Object, regardless of
 * when it was created or where it was loaded into memory.  The problem
 * with java.lang.Object.hashCode() is that it essentially relies on
 * memory location of an object (what identity it was assigned), whereas
 * this method will produce the same hashCode for any object graph, regardless
 * of how many times it is created.<br/><br/>
 *
 * This method will handle cycles correctly (A->B->C->A).  In this case,
 * Starting with object A, B, or C would yield the same hashCode.  If an
 * object encountered (root, suboject, etc.) has a hashCode() method on it
 * (that is not Object.hashCode()), that hashCode() method will be called
 * and it will stop traversal on that branch.
 * @param obj Object who hashCode is desired.
 * @return the 'deep' hashCode value for the passed in object.
 *///from ww  w.  j av  a2  s .  c o m
public static int deepHashCode(Object obj) {
    Set visited = new HashSet();
    LinkedList<Object> stack = new LinkedList<Object>();
    stack.addFirst(obj);
    int hash = 0;

    while (!stack.isEmpty()) {
        obj = stack.removeFirst();
        if (obj == null || visited.contains(obj)) {
            continue;
        }

        visited.add(obj);

        if (obj.getClass().isArray()) {
            int len = Array.getLength(obj);
            for (int i = 0; i < len; i++) {
                stack.addFirst(Array.get(obj, i));
            }
            continue;
        }

        if (obj instanceof Collection) {
            stack.addAll(0, (Collection) obj);
            continue;
        }

        if (obj instanceof Map) {
            stack.addAll(0, ((Map) obj).keySet());
            stack.addAll(0, ((Map) obj).values());
            continue;
        }

        if (hasCustomHashCode(obj.getClass())) { // A real hashCode() method exists, call it.
            hash += obj.hashCode();
            continue;
        }

        Collection<Field> fields = getDeepDeclaredFields(obj.getClass());
        for (Field field : fields) {
            try {
                stack.addFirst(field.get(obj));
            } catch (Exception ignored) {
            }
        }
    }
    return hash;
}

From source file:com.github.jknack.handlebars.Context.java

/**
 * Resolve a array or list access using idx.
 *
 * @param current The current scope.//w  w w.  j  a va 2  s. c  o m
 * @param idx The index of the array or list.
 * @return An object at the given location or null.
 */
@SuppressWarnings("rawtypes")
private Object resolveArrayAccess(final Object current, final String idx) {
    // It is a number, check if the current value is a index base object.
    int pos = Integer.parseInt(idx);
    try {
        if (current instanceof List) {
            return ((List) current).get(pos);
        } else if (current.getClass().isArray()) {
            return Array.get(current, pos);
        }
    } catch (IndexOutOfBoundsException exception) {
        // Index is outside of range, fallback to null as in handlebar.js
        return null;
    }
    return NULL;
}

From source file:com.flexive.shared.FxFormatUtils.java

/**
 * Generic SQL escape method.//w w  w  . j  a  va  2s  . c o m
 *
 * @param value the value to be formatted
 * @return the formatted value
 */
public static String escapeForSql(Object value) {
    if (value instanceof FxValue) {
        return ((FxValue) value).getSqlValue();
    } else if (value instanceof String) {
        return "'" + StringUtils.replace((String) value, "'", "''") + "'";
    } else if (value instanceof Date) {
        return "'" + new Formatter().format("%tF", (Date) value) + "'";
    } else if (value instanceof FxSelectListItem) {
        return String.valueOf(((FxSelectListItem) value).getId());
    } else if (value instanceof SelectMany) {
        final SelectMany selectMany = (SelectMany) value;
        final List<Long> selectedIds = selectMany.getSelectedIds();
        if (selectedIds.size() > 1) {
            return "(" + StringUtils.join(selectedIds.iterator(), ',') + ")";
        } else if (selectedIds.size() == 1) {
            return String.valueOf(selectedIds.get(0));
        } else {
            return "-1";
        }
    } else if (value != null && value.getClass().isArray()) {
        // decode array via reflection to support primitive arrays
        final List<Object> result = new ArrayList<Object>();
        final int len = Array.getLength(value);
        for (int i = 0; i < len; i++) {
            result.add(Array.get(value, i));
        }
        return makeTuple(result);
    } else if (value instanceof Collection) {
        return makeTuple((Collection) value);
    } else if (value != null) {
        return value.toString();
    } else {
        return "null";
    }
}

From source file:gda.data.scan.datawriter.NexusDataWriter.java

private static int getIntfromBuffer(Object buf) {
    if (buf instanceof Object[])
        buf = ((Object[]) buf)[0];
    if (buf instanceof Number)
        return ((Number) buf).intValue();
    if (buf.getClass().isArray()) {
        int len = ArrayUtils.getLength(buf);
        if (len == 1) {
            Object object = Array.get(buf, 0);
            return getIntfromBuffer(object);
        }//  w  ww .j av  a2 s .c o m
    }
    return Integer.parseInt(buf.toString());
}

From source file:org.apache.torque.util.SqlExpression.java

/**
 * Takes a columnName and criteria (which must be an array) and builds a SQL 'IN' expression taking into account the ignoreCase
 * flag.// w ww. j ava 2  s.c o m
 *
 * @param  columnName  A column.
 * @param  criteria  The value to compare the column against.
 * @param  comparison  Either " IN " or " NOT IN ".
 * @param  ignoreCase  If true and columns represent Strings, the appropriate function defined for the database will be used to
 *                     ignore differences in case.
 * @param  db  Represents the database in use, for vendor specific functions.
 * @param  whereClause  A StringBuffer to which the sql expression will be appended.
 */
static void buildIn(String columnName, Object criteria, SqlEnum comparison, boolean ignoreCase, DB db,
        StringBuffer whereClause) {
    if (ignoreCase) {
        whereClause.append(db.ignoreCase(columnName));
    } else {
        whereClause.append(columnName);
    }

    whereClause.append(comparison);
    HashSet inClause = new HashSet();
    if (criteria instanceof List) {
        Iterator iter = ((List) criteria).iterator();
        while (iter.hasNext()) {
            Object value = iter.next();

            // The method processInValue() quotes the string
            // and/or wraps it in UPPER().
            inClause.add(processInValue(value, ignoreCase, db));
        }
    } else if (criteria instanceof String) {
        // subquery
        inClause.add(criteria);
    } else {
        // Assume array.
        for (int i = 0; i < Array.getLength(criteria); i++) {
            Object value = Array.get(criteria, i);

            // The method processInValue() quotes the string
            // and/or wraps it in UPPER().
            inClause.add(processInValue(value, ignoreCase, db));
        }
    }
    whereClause.append('(').append(StringUtils.join(inClause.iterator(), ",")).append(')');
}

From source file:org.eclipse.dataset.AbstractCompoundDataset.java

public static int[] toIntegerArray(final Object b, final int itemSize) {
    int[] result = null;

    if (b instanceof Number) {
        result = new int[itemSize];
        int val = ((Number) b).intValue();
        for (int i = 0; i < itemSize; i++)
            result[i] = val;
    } else if (b instanceof int[]) {
        result = (int[]) b;
        if (result.length < itemSize) {
            result = new int[itemSize];
            int ilen = result.length;
            for (int i = 0; i < ilen; i++)
                result[i] = ((int[]) b)[i];
        }/*from www .j  a  v  a2 s  . c o  m*/
    } else if (b instanceof List<?>) {
        result = new int[itemSize];
        List<?> jl = (List<?>) b;
        int ilen = jl.size();
        if (ilen > 0 && !(jl.get(0) instanceof Number)) {
            logger.error("Given array was not of a numerical primitive type");
            throw new IllegalArgumentException("Given array was not of a numerical primitive type");
        }
        ilen = Math.min(itemSize, ilen);
        for (int i = 0; i < ilen; i++) {
            result[i] = (int) toLong(jl.get(i));
        }
    } else if (b.getClass().isArray()) {
        result = new int[itemSize];
        int ilen = Array.getLength(b);
        if (ilen > 0 && !(Array.get(b, 0) instanceof Number)) {
            logger.error("Given array was not of a numerical primitive type");
            throw new IllegalArgumentException("Given array was not of a numerical primitive type");
        }
        ilen = Math.min(itemSize, ilen);
        for (int i = 0; i < ilen; i++)
            result[i] = (int) ((Number) Array.get(b, i)).longValue();
    } else if (b instanceof Complex) {
        if (itemSize > 2) {
            logger.error("Complex number will not fit in compound dataset");
            throw new IllegalArgumentException("Complex number will not fit in compound dataset");
        }
        Complex cb = (Complex) b;
        switch (itemSize) {
        default:
        case 0:
            break;
        case 1:
            result = new int[] { (int) cb.getReal() };
            break;
        case 2:
            result = new int[] { (int) cb.getReal(), (int) cb.getImaginary() };
            break;
        }
    } else if (b instanceof Dataset) {
        Dataset db = (Dataset) b;
        if (db.getSize() != 1) {
            logger.error("Given dataset must have only one item");
            throw new IllegalArgumentException("Given dataset must have only one item");
        }
        return toIntegerArray(db.getObjectAbs(0), itemSize);
    } else if (b instanceof IDataset) {
        IDataset db = (Dataset) b;
        if (db.getSize() != 1) {
            logger.error("Given dataset must have only one item");
            throw new IllegalArgumentException("Given dataset must have only one item");
        }
        return toIntegerArray(db.getObject(new int[db.getRank()]), itemSize);
    }

    return result;
}

From source file:com.flexive.faces.FxJsfComponentUtils.java

/**
 * Check if the given array contains an actual value
 *
 * @param valueArray value array/*from w w w.  j a  v  a  2  s .  c  o m*/
 * @return if an actual value is set in the array
 */
public static boolean containsaValue(Object valueArray) {
    if (null != valueArray) {
        int len = Array.getLength(valueArray);
        for (int i = 0; i < len; i++) {
            Object value = Array.get(valueArray, i);
            if (value != null && !(value.equals(FxSelectRenderer.NO_VALUE))) {
                return true;
            }
        }
    }
    return false;
}

From source file:org.eclipse.january.dataset.DTypeUtils.java

public static double toImag(final Object b) {
    if (b instanceof Number) {
        return 0;
    } else if (b instanceof Boolean) {
        return 0;
    } else if (b instanceof Complex) {
        return ((Complex) b).getImaginary();
    } else if (b.getClass().isArray()) {
        if (Array.getLength(b) < 2)
            return 0;
        return toReal(Array.get(b, 1));
    } else if (b instanceof Dataset) {
        Dataset db = (Dataset) b;/*from   ww w . j a  v a  2  s  . co  m*/
        if (db.getSize() != 1) {
            logger.error("Given dataset must have only one item");
            throw new IllegalArgumentException("Given dataset must have only one item");
        }
        return toImag(db.getObjectAbs(0));
    } else if (b instanceof IDataset) {
        IDataset db = (Dataset) b;
        if (db.getSize() != 1) {
            logger.error("Given dataset must have only one item");
            throw new IllegalArgumentException("Given dataset must have only one item");
        }
        return toImag(db.getObject(new int[db.getRank()]));
    } else {
        logger.error("Argument is of unsupported class");
        throw new IllegalArgumentException("Argument is of unsupported class");
    }
}

From source file:com.espertech.esper.support.util.ArrayAssertionUtil.java

private static Object[] toObjectArray(Object array) {
    if ((array == null) || (!array.getClass().isArray())) {
        throw new IllegalArgumentException("Object not an array but type '" + array.getClass() + "'");
    }//w w  w.  j  a va2 s .  c  o m
    int size = Array.getLength(array);
    Object[] val = new Object[size];
    for (int i = 0; i < size; i++) {
        val[i] = Array.get(array, i);
    }
    return val;
}

From source file:de.micromata.genome.util.bean.PrivateBeanUtils.java

/**
 * Gets the bean size intern./*from  w  w w .j  av  a2s  .  c  om*/
 *
 * @param bean the bean
 * @param clazz the clazz
 * @param m the m
 * @param classNameMatcher the class name matcher
 * @param fieldNameMatcher the field name matcher
 * @return the bean size intern
 */
public static int getBeanSizeIntern(Object bean, Class<?> clazz, IdentityHashMap<Object, Object> m,
        Matcher<String> classNameMatcher, Matcher<String> fieldNameMatcher) {
    if (classNameMatcher.match(clazz.getName()) == false) {
        return 0;
    }
    if (clazz.isArray() == true) {
        if (clazz == boolean[].class) {
            return (((boolean[]) bean).length * 4);
        } else if (clazz == char[].class) {
            return (((char[]) bean).length * 2);
        } else if (clazz == byte[].class) {
            return (((byte[]) bean).length * 1);
        } else if (clazz == short[].class) {
            return (((short[]) bean).length * 2);
        } else if (clazz == int[].class) {
            return (((int[]) bean).length * 4);
        } else if (clazz == long[].class) {
            return (((long[]) bean).length * 4);
        } else if (clazz == float[].class) {
            return (((float[]) bean).length * 4);
        } else if (clazz == double[].class) {
            return (((double[]) bean).length * 8);
        } else {
            int length = Array.getLength(bean);
            int ret = (length * 4);
            for (int i = 0; i < length; ++i) {
                ret += getBeanSize(Array.get(bean, i), m, classNameMatcher, fieldNameMatcher);
            }
            return ret;
        }
    }
    int ret = 0;
    try {
        for (Field f : clazz.getDeclaredFields()) {
            int mod = f.getModifiers();
            if (Modifier.isStatic(mod) == true) {
                continue;
            }
            if (fieldNameMatcher.match(clazz.getName() + "." + f.getName()) == false) {
                continue;
            }
            if (f.getType() == Boolean.TYPE) {
                ret += 4;
            } else if (f.getType() == Character.TYPE) {
                ret += 2;
            } else if (f.getType() == Byte.TYPE) {
                ret += 1;
            } else if (f.getType() == Short.TYPE) {
                ret += 2;
            } else if (f.getType() == Integer.TYPE) {
                ret += 4;
            } else if (f.getType() == Long.TYPE) {
                ret += 8;
            } else if (f.getType() == Float.TYPE) {
                ret += 4;
            } else if (f.getType() == Double.TYPE) {
                ret += 8;
            } else {

                ret += 4;
                Object o = null;
                try {
                    o = readField(bean, f);
                    if (o == null) {
                        continue;
                    }
                } catch (NoClassDefFoundError ex) {
                    // nothing
                    continue;
                }
                int nestedsize = getBeanSize(o, o.getClass(), m, classNameMatcher, fieldNameMatcher);
                ret += nestedsize;
            }
        }
    } catch (NoClassDefFoundError ex) {
        // ignore here.
    }
    if (clazz == Object.class || clazz.getSuperclass() == null) {
        return ret;
    }
    ret += getBeanSizeIntern(bean, clazz.getSuperclass(), m, classNameMatcher, fieldNameMatcher);
    return ret;
}