Example usage for java.lang Object hashCode

List of usage examples for java.lang Object hashCode

  1. HOME
  2. Java
  3. java
  4. java.lang.*
  5. Object
  6. hashCode

Introduction

In this page you can find the example usage for java.lang Object hashCode.

Prototype

@HotSpotIntrinsicCandidate
public native int hashCode();

Source Link

Document

Returns a hash code value for the object.

Usage

From source file:org.jaffa.soa.dataaccess.TransformerUtils.java

/**
 * Same as printGraph(Object source), except the objectStack lists all the parent
 * objects its printed, and if this is one of them, it stops. This allows detection
 * of possible infinite recusion./*from  w w  w  . j  a v a2s .com*/
 *
 * @param source      Javabean who's contents should be printed
 * @param objectStack List of objects already traversed
 * @return multi-line string of this beans properties and their values
 */
public static String printGraph(Object source, List objectStack) {
    if (source == null)
        return null;

    // Prevent infinite object recursion
    if (objectStack != null)
        if (objectStack.contains(source))
            return "Object Already Used. " + source.getClass().getName() + '@' + source.hashCode();
        else
            objectStack.add(source);
    else {
        objectStack = new ArrayList();
        objectStack.add(source);
    }

    StringBuffer out = new StringBuffer();
    out.append(source.getClass().getName());
    out.append("\n");

    try {
        BeanInfo sInfo = Introspector.getBeanInfo(source.getClass());
        PropertyDescriptor[] sDescriptors = sInfo.getPropertyDescriptors();
        if (sDescriptors != null && sDescriptors.length != 0)
            for (int i = 0; i < sDescriptors.length; i++) {
                PropertyDescriptor sDesc = sDescriptors[i];
                Method sm = sDesc.getReadMethod();
                if (sm != null && sDesc.getWriteMethod() != null) {
                    if (!sm.isAccessible())
                        sm.setAccessible(true);
                    Object sValue = sm.invoke(source, (Object[]) null);

                    out.append("  ");
                    out.append(sDesc.getName());
                    if (source instanceof GraphDataObject) {
                        if (((GraphDataObject) source).hasChanged(sDesc.getName()))
                            out.append('*');
                    }
                    out.append('=');
                    if (sValue == null)
                        out.append("<--NULL-->\n");
                    else if (sm.getReturnType().isArray()
                            && !sm.getReturnType().getComponentType().isPrimitive()) {
                        StringBuffer out2 = new StringBuffer();
                        out2.append("Array of ");
                        out2.append(sm.getReturnType().getComponentType().getName());
                        out2.append("\n");
                        // Loop through array
                        Object[] a = (Object[]) sValue;
                        for (int j = 0; j < a.length; j++) {
                            out2.append('[');
                            out2.append(j);
                            out2.append("] ");
                            if (a[j] == null)
                                out2.append("<--NULL-->");
                            else if (GraphDataObject.class.isAssignableFrom(a[j].getClass()))
                                out2.append(((GraphDataObject) a[j]).toString(objectStack));
                            else
                                //out2.append(StringHelper.linePad(a[j].toString(), 4, " ",true));
                                out2.append(a[j].toString());
                        }
                        out.append(StringHelper.linePad(out2.toString(), 4, " ", true));
                    } else {
                        if (GraphDataObject.class.isAssignableFrom(sValue.getClass()))
                            out.append(StringHelper.linePad(((GraphDataObject) sValue).toString(objectStack), 4,
                                    " ", true));
                        else {
                            out.append(StringHelper.linePad(sValue.toString(), 4, " ", true));
                            out.append("\n");
                        }

                    }
                }
            }
    } catch (IllegalAccessException e) {
        TransformException me = new TransformException(TransformException.ACCESS_ERROR, "???", e.getMessage());
        log.error(me.getLocalizedMessage(), e);
        //throw me;
    } catch (InvocationTargetException e) {
        TransformException me = new TransformException(TransformException.INVOCATION_ERROR, "???", e);
        log.error(me.getLocalizedMessage(), me.getCause());
        //throw me;
    } catch (IntrospectionException e) {
        TransformException me = new TransformException(TransformException.INTROSPECT_ERROR, "???",
                e.getMessage());
        log.error(me.getLocalizedMessage(), e);
        //throw me;
    }
    return out.toString();
}

From source file:org.apache.ojb.odmg.collections.DListImpl.java

public int hashCode() {
    int hashCode = 1;
    Iterator it = elements.iterator();
    while (it.hasNext()) {
        Object obj = it.next();
        hashCode = 31 * hashCode + (obj == null ? 0 : obj.hashCode());
    }// www .  j  a v  a2 s  . c o m
    return hashCode;
}

From source file:com.kdmanalytics.toif.assimilator.XMLNode.java

public boolean equals(Object o) {
    if (!(o instanceof XMLNode))
        return false;
    if (o.hashCode() == hashCode())
        return true;
    return false;
}

From source file:org.jabsorb.client.Client.java

/**
 * This method is public because of the inheritance from the
 * InvokationHandler -- should never be called directly.
 *//*from   w  w  w  .  j  a v a 2 s.  c o  m*/
public Object invoke(Object proxyObj, Method method, Object[] args) throws Exception {
    String methodName = method.getName();
    if (methodName.equals("hashCode")) {
        return new Integer(System.identityHashCode(proxyObj));
    } else if (methodName.equals("equals")) {
        return (proxyObj == args[0] ? Boolean.TRUE : Boolean.FALSE);
    } else if (methodName.equals("toString")) {
        return proxyObj.getClass().getName() + '@' + Integer.toHexString(proxyObj.hashCode());
    }
    return invoke(proxyMap.getString(proxyObj), method.getName(), args, method.getReturnType());
}

From source file:org.jactr.core.slot.DefaultConditionalSlot.java

public boolean matchesCondition(Object test) {
    if (test instanceof ISlot)
        test = ((ISlot) test).getValue();

    if (LOGGER.isDebugEnabled()) {
        StringBuffer sb = new StringBuffer("Test value : ");
        sb.append(test);/*  w  w  w  .j  a  va  2s.c  om*/
        if (test != null) {
            sb.append(", ");
            sb.append(test.getClass().getName());
            sb.append(", ");
            sb.append(test.hashCode());
        }
        LOGGER.debug(sb.toString());
        sb.delete(0, sb.length());

        sb.append("Cond value : ");
        Object tmp = getValue();
        sb.append(tmp);
        if (tmp != null) {
            sb.append(", ");
            sb.append(tmp.getClass().getName());
            sb.append(", ");
            sb.append(tmp.hashCode());
        }
        LOGGER.debug(sb.toString());
    }

    boolean rtn = false;
    try {
        switch (_condition) {
        case EQUALS:
            rtn = equalValues(test);
            break;

        case LESS_THAN:
            rtn = lessThan(test);
            break;

        case LESS_THAN_EQUALS:
            rtn = equalValues(test) | lessThan(test);
            break;

        case GREATER_THAN:
            rtn = greaterThan(test);
            break;

        case GREATER_THAN_EQUALS:
            rtn = equalValues(test) | greaterThan(test);
            break;

        case NOT_EQUALS:
            rtn = !equalValues(test);
            break;

        case WITHIN:
            rtn = within(test);
            break;
        }
    } catch (Exception e) {
        if (LOGGER.isDebugEnabled())
            LOGGER.debug("Unknown failure comparing " + this + " with " + test, e);
    }

    if (LOGGER.isDebugEnabled())
        LOGGER.debug("matchesCondition " + this + " " + test + " : " + rtn);

    return rtn;
}

From source file:com.music.util.cache.CacheKeyGenerator.java

@Override
public Object generate(Object target, Method method, Object... params) {
    StringBuilder key = new StringBuilder();
    key.append(target.getClass().getSimpleName()).append(".").append(method.getName()).append(":");

    if (params.length == 0) {
        key.append(NO_PARAM_KEY).toString();
    }//from  w w  w .j  a v  a2 s .  c  o m

    for (Object param : params) {
        if (param == null) {
            key.append(NULL_PARAM_KEY);
        } else if (ClassUtils.isPrimitiveOrWrapper(param.getClass()) || param instanceof String) {
            key.append(param);
        } else if (param instanceof CacheKey) {
            key.append(((CacheKey) param).getCacheKey());
        } else {
            logger.warn("Using object " + param
                    + " as cache key. Either use key='..' or implement CacheKey. Method is " + target.getClass()
                    + "#" + method.getName());
            key.append(param.hashCode());
        }
    }

    return key.toString();
}

From source file:org.springmodules.util.ObjectsTests.java

/**
 * Asserts that the given hash code is equal to the one obtained from
 * <code>{@link Objects#nullSafeHashCode(Object)}</code>.
 * /*from  ww w .  j  a v a2 s .c  om*/
 * @param expected
 *          the expected hash code.
 * @param array
 *          the array of primitives.
 */
private void assertEqualHashCodes(int expected, Object array) {
    int actual = Objects.nullSafeHashCode(array);

    assertEquals(expected, actual);
    assertTrue(array.hashCode() != actual);
}

From source file:org.t2framework.commons.util.ArrayMap.java

 public boolean containsKey(final Object key) {
   Entry<K, V>[] tbl = mapTable;/*from w  w  w  . ja v  a 2  s . c o  m*/
   if (key != null) {
      int hashCode = key.hashCode();
      int index = (hashCode & 0x7FFFFFFF) % tbl.length;
      for (Entry<K, V> e = tbl[index]; e != null; e = e.next_) {
         if (e.hashCode_ == hashCode && key.equals(e.key_)) {
            return true;
         }
      }
   } else {
      for (Entry<K, V> e = tbl[0]; e != null; e = e.next_) {
         if (e.key_ == null) {
            return true;
         }
      }
   }
   return false;
}

From source file:org.t2framework.commons.util.ArrayMap.java

 public V get(final Object key) {
   Entry<K, V>[] tbl = mapTable;/*from   w w w . j  a va 2 s  .  c om*/
   if (key != null) {
      int hashCode = key.hashCode();
      int index = (hashCode & 0x7FFFFFFF) % tbl.length;
      for (Entry<K, V> e = tbl[index]; e != null; e = e.next_) {
         if (e.hashCode_ == hashCode && key.equals(e.key_)) {
            return e.value_;
         }
      }
   } else {
      for (Entry<K, V> e = tbl[0]; e != null; e = e.next_) {
         if (e.key_ == null) {
            return e.value_;
         }
      }
   }
   return null;
}

From source file:org.cloudgraph.store.lang.DefaultAssembler.java

/**
 * Creates a unique mappable key using the qualified type name and all key
 * property values from the given row.//from w w w . j a va  2s .  c o m
 * 
 * @param type
 *          the type
 * @param row
 *          the data values
 * @return the key
 */
protected int createHashKey(PlasmaType type, List<PropertyPair> row) {
    PropertyPair[] pairs = new PropertyPair[row.size()];
    row.toArray(pairs);
    Arrays.sort(pairs, this.nameComparator);
    int pkHash = type.getQualifiedName().hashCode();
    int fallBackHash = type.getQualifiedName().hashCode();

    int pks = 0;
    for (int i = 0; i < pairs.length; i++) {
        Object value = pairs[i].getValue();
        if (value == null) {
            log.warn("null voue for property, " + pairs[i].getProp().toString());
            continue;
        }
        if (pairs[i].getProp().isKey(KeyType.primary)) {
            pkHash = pkHash ^ value.hashCode();
            fallBackHash = fallBackHash ^ value.hashCode();
            pks++;
        } else {
            fallBackHash = fallBackHash ^ value.hashCode();
        }
    }
    if (pks > 0) {
        List<Property> pkProps = type.findProperties(KeyType.primary);
        if (pkProps.size() == pks)
            return pkHash;
    }

    return fallBackHash;
}