List of usage examples for java.lang.reflect Field getFloat
@CallerSensitive @ForceInline public float getFloat(Object obj) throws IllegalArgumentException, IllegalAccessException
From source file:org.rhq.enterprise.gui.legacy.taglib.ConstantsTag.java
public int doEndTag() throws JspException { try {/*from w w w .jav a 2s . c o m*/ JspWriter out = pageContext.getOut(); if (className == null) { className = pageContext.getServletContext().getInitParameter(constantsClassNameParam); } if (validate(out)) { // we're misconfigured. getting this far // is a matter of what our failure mode is; // if we haven't thrown an Error, carry on log.debug("constants tag misconfigured"); return EVAL_PAGE; } Map<String, String> fieldMap; if (constants.containsKey(className)) { // we cache the result of the constant's class // reflection field walk as a map fieldMap = (Map<String, String>) constants.get(className); } else { fieldMap = new HashMap<String, String>(); Class typeClass = Class.forName(className); if (typeClass.isEnum()) { for (Object enumConstantObj : typeClass.getEnumConstants()) { Enum enumConstant = (Enum) enumConstantObj; // Set name *and* value to enum name (e.g. name of ResourceCategory.PLATFORM = "PLATFORM") // NOTE: We do not set the value to enumConstant.ordinal(), because there is no way to // convert the ordinal value back to an Enum (i.e. no Enum.valueOf(int ordinal) method). fieldMap.put(enumConstant.name(), enumConstant.name()); } } else { Object instance = typeClass.newInstance(); Field[] fields = typeClass.getFields(); for (Field field : fields) { // string comparisons of class names should be cheaper // than reflective Class comparisons, the asumption here // is that most constants are Strings, ints and booleans // but a minimal effort is made to accomadate all types // and represent them as String's for our tag's output String fieldType = field.getType().getName(); String strVal; if (fieldType.equals("java.lang.String")) { strVal = (String) field.get(instance); } else if (fieldType.equals("int")) { strVal = Integer.toString(field.getInt(instance)); } else if (fieldType.equals("boolean")) { strVal = Boolean.toString(field.getBoolean(instance)); } else if (fieldType.equals("char")) { strVal = Character.toString(field.getChar(instance)); } else if (fieldType.equals("double")) { strVal = Double.toString(field.getDouble(instance)); } else if (fieldType.equals("float")) { strVal = Float.toString(field.getFloat(instance)); } else if (fieldType.equals("long")) { strVal = Long.toString(field.getLong(instance)); } else if (fieldType.equals("short")) { strVal = Short.toString(field.getShort(instance)); } else if (fieldType.equals("byte")) { strVal = Byte.toString(field.getByte(instance)); } else { strVal = field.get(instance).toString(); } fieldMap.put(field.getName(), strVal); } } // cache the result constants.put(className, fieldMap); } if ((symbol != null) && !fieldMap.containsKey(symbol)) { // tell the developer that he's being a dummy and what // might be done to remedy the situation // TODO: what happens if the constants change? // do we need to throw a JspException, here? - mtk String err1 = symbol + " was not found in " + className + "\n"; String err2 = err1 + "use <constants:diag classname=\"" + className + "\"/>\n" + "to figure out what you're looking for"; log.error(err2); die(out, err1); } if (varSpecified) { doSet(fieldMap); } else { doOutput(fieldMap, out); } } catch (JspException e) { throw e; } catch (Exception e) { log.debug("doEndTag() failed: ", e); throw new JspException("Could not access constants tag", e); } return EVAL_PAGE; }
From source file:cn.edu.zafu.corepage.base.BaseActivity.java
/** * ??//from w w w .j a v a 2 s . c o m * * @param outState Bundle */ @Override protected void onSaveInstanceState(Bundle outState) { Field[] fields = this.getClass().getDeclaredFields(); Field.setAccessible(fields, true); Annotation[] ans; for (Field f : fields) { ans = f.getDeclaredAnnotations(); for (Annotation an : ans) { if (an instanceof SaveWithActivity) { try { Object o = f.get(this); if (o == null) { continue; } String fieldName = f.getName(); if (o instanceof Integer) { outState.putInt(fieldName, f.getInt(this)); } else if (o instanceof String) { outState.putString(fieldName, (String) f.get(this)); } else if (o instanceof Long) { outState.putLong(fieldName, f.getLong(this)); } else if (o instanceof Short) { outState.putShort(fieldName, f.getShort(this)); } else if (o instanceof Boolean) { outState.putBoolean(fieldName, f.getBoolean(this)); } else if (o instanceof Byte) { outState.putByte(fieldName, f.getByte(this)); } else if (o instanceof Character) { outState.putChar(fieldName, f.getChar(this)); } else if (o instanceof CharSequence) { outState.putCharSequence(fieldName, (CharSequence) f.get(this)); } else if (o instanceof Float) { outState.putFloat(fieldName, f.getFloat(this)); } else if (o instanceof Double) { outState.putDouble(fieldName, f.getDouble(this)); } else if (o instanceof String[]) { outState.putStringArray(fieldName, (String[]) f.get(this)); } else if (o instanceof Parcelable) { outState.putParcelable(fieldName, (Parcelable) f.get(this)); } else if (o instanceof Serializable) { outState.putSerializable(fieldName, (Serializable) f.get(this)); } else if (o instanceof Bundle) { outState.putBundle(fieldName, (Bundle) f.get(this)); } } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } } } } super.onSaveInstanceState(outState); }
From source file:alice.tuprolog.lib.OOLibrary.java
/** * get the value of the field/*from ww w .jav a 2 s .c o m*/ */ private boolean java_get(PTerm objId, PTerm fieldTerm, PTerm what) { if (!fieldTerm.isAtom()) { return false; } String fieldName = ((Struct) fieldTerm).getName(); Object obj = null; try { Class<?> cl = null; if (objId.isCompound() && ((Struct) objId).getName().equals("class")) { String clName = null; if (((Struct) objId).getArity() == 1) clName = alice.util.Tools.removeApices(((Struct) objId).getArg(0).toString()); if (clName != null) { try { cl = Class.forName(clName, true, dynamicLoader); } catch (ClassNotFoundException ex) { getEngine().logger.warn("Java class not found: " + clName); return false; } catch (Exception ex) { getEngine().logger.warn("Static field " + fieldName + " not found in class " + alice.util.Tools.removeApices(((Struct) objId).getArg(0).toString())); return false; } } } else { String objName = alice.util.Tools.removeApices(objId.toString()); obj = currentObjects.get(objName); if (obj == null) { return false; } cl = obj.getClass(); } Field field = cl.getField(fieldName); Class<?> fc = field.getType(); field.setAccessible(true); if (fc.equals(Integer.TYPE) || fc.equals(Byte.TYPE)) { int value = field.getInt(obj); return unify(what, new alice.tuprolog.Int(value)); } else if (fc.equals(java.lang.Long.TYPE)) { long value = field.getLong(obj); return unify(what, new alice.tuprolog.Long(value)); } else if (fc.equals(java.lang.Float.TYPE)) { float value = field.getFloat(obj); return unify(what, new alice.tuprolog.Float(value)); } else if (fc.equals(java.lang.Double.TYPE)) { double value = field.getDouble(obj); return unify(what, new alice.tuprolog.Double(value)); } else { // the field value is an object Object res = field.get(obj); return bindDynamicObject(what, res); } } catch (NoSuchFieldException ex) { getEngine().logger.warn("Field " + fieldName + " not found in class " + objId); return false; } catch (Exception ex) { getEngine().logger.warn("Generic error in accessing the field"); return false; } }