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JSP2.1 Jasper implementation from Glassfish
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.el.lang;
import java.beans.PropertyEditor;
import java.beans.PropertyEditorManager;
import java.math.BigDecimal;
import java.math.BigInteger;
import javax.el.ELException;
import javax.el.PropertyNotFoundException;
import com.sun.el.util.MessageFactory;
/**
* A helper class that implements the EL Specification
*
* @author Jacob Hookom [[email protected]]
* @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: kchung $
*/
public class ELSupport {
private final static Long ZERO = Long.valueOf(0L);
public final static void throwUnhandled(Object base, Object property)
throws ELException {
if (base == null) {
throw new PropertyNotFoundException(MessageFactory.get(
"error.resolver.unhandled.null", property));
} else {
throw new PropertyNotFoundException(MessageFactory.get(
"error.resolver.unhandled", base.getClass(), property));
}
}
/**
* @param obj0
* @param obj1
* @return
* @throws EvaluationException
*/
public final static int compare(final Object obj0, final Object obj1)
throws ELException {
if (obj0 == obj1 || equals(obj0, obj1)) {
return 0;
}
if (isBigDecimalOp(obj0, obj1)) {
BigDecimal bd0 = (BigDecimal) coerceToNumber(obj0, BigDecimal.class);
BigDecimal bd1 = (BigDecimal) coerceToNumber(obj1, BigDecimal.class);
return bd0.compareTo(bd1);
}
if (isDoubleOp(obj0, obj1)) {
Double d0 = (Double) coerceToNumber(obj0, Double.class);
Double d1 = (Double) coerceToNumber(obj1, Double.class);
return d0.compareTo(d1);
}
if (isBigIntegerOp(obj0, obj1)) {
BigInteger bi0 = (BigInteger) coerceToNumber(obj0, BigInteger.class);
BigInteger bi1 = (BigInteger) coerceToNumber(obj1, BigInteger.class);
return bi0.compareTo(bi1);
}
if (isLongOp(obj0, obj1)) {
Long l0 = (Long) coerceToNumber(obj0, Long.class);
Long l1 = (Long) coerceToNumber(obj1, Long.class);
return l0.compareTo(l1);
}
if (obj0 instanceof String || obj1 instanceof String) {
return coerceToString(obj0).compareTo(coerceToString(obj1));
}
if (obj0 instanceof Comparable) {
return (obj1 != null) ? ((Comparable) obj0).compareTo(obj1) : 1;
}
if (obj1 instanceof Comparable) {
return (obj0 != null) ? -((Comparable) obj1).compareTo(obj0) : -1;
}
throw new ELException(MessageFactory.get("error.compare", obj0, obj1));
}
/**
* @param obj0
* @param obj1
* @return
* @throws EvaluationException
*/
public final static boolean equals(final Object obj0, final Object obj1)
throws ELException {
if (obj0 == obj1) {
return true;
}
if (obj0 == null || obj1 == null) {
return false;
}
if (obj0 instanceof Boolean || obj1 instanceof Boolean) {
return coerceToBoolean(obj0).equals(coerceToBoolean(obj1));
}
if (obj0.getClass().isEnum()) {
return obj0.equals(coerceToEnum(obj1, obj0.getClass()));
}
if (obj1.getClass().isEnum()) {
return obj1.equals(coerceToEnum(obj0, obj1.getClass()));
}
if (obj0 instanceof String || obj1 instanceof String) {
return coerceToString(obj0).equals(coerceToString(obj1));
}
if (isBigDecimalOp(obj0, obj1)) {
BigDecimal bd0 = (BigDecimal) coerceToNumber(obj0, BigDecimal.class);
BigDecimal bd1 = (BigDecimal) coerceToNumber(obj1, BigDecimal.class);
return bd0.equals(bd1);
}
if (isDoubleOp(obj0, obj1)) {
Double d0 = (Double) coerceToNumber(obj0, Double.class);
Double d1 = (Double) coerceToNumber(obj1, Double.class);
return d0.equals(d1);
}
if (isBigIntegerOp(obj0, obj1)) {
BigInteger bi0 = (BigInteger) coerceToNumber(obj0, BigInteger.class);
BigInteger bi1 = (BigInteger) coerceToNumber(obj1, BigInteger.class);
return bi0.equals(bi1);
}
if (isLongOp(obj0, obj1)) {
Long l0 = (Long) coerceToNumber(obj0, Long.class);
Long l1 = (Long) coerceToNumber(obj1, Long.class);
return l0.equals(l1);
} else {
return obj0.equals(obj1);
}
}
/**
* @param obj
* @return
*/
public final static Boolean coerceToBoolean(final Object obj)
throws IllegalArgumentException {
if (obj == null || "".equals(obj)) {
return Boolean.FALSE;
}
if (obj instanceof Boolean) {
return (Boolean) obj;
}
if (obj instanceof String) {
return Boolean.valueOf((String) obj);
}
throw new IllegalArgumentException(MessageFactory.get("error.convert",
obj, obj.getClass(), Boolean.class));
}
public final static Enum coerceToEnum(final Object obj, Class type) {
if (obj == null || "".equals(obj)) {
return null;
}
if (obj.getClass().isEnum()) {
return (Enum)obj;
}
return Enum.valueOf(type, obj.toString());
}
public final static Character coerceToCharacter(final Object obj)
throws IllegalArgumentException {
if (obj == null || "".equals(obj)) {
return Character.valueOf((char) 0);
}
if (obj instanceof String) {
return Character.valueOf(((String) obj).charAt(0));
}
if (ELArithmetic.isNumber(obj)) {
return Character.valueOf((char) ((Number) obj).shortValue());
}
Class objType = obj.getClass();
if (obj instanceof Character) {
return (Character) obj;
}
throw new IllegalArgumentException(MessageFactory.get("error.convert",
obj, objType, Character.class));
}
public final static Number coerceToNumber(final Object obj) {
if (obj == null) {
return ZERO;
} else if (obj instanceof Number) {
return (Number) obj;
} else {
String str = coerceToString(obj);
if (isStringFloat(str)) {
return toFloat(str);
} else {
return toNumber(str);
}
}
}
protected final static Number coerceToNumber(final Number number,
final Class type) throws IllegalArgumentException {
if (Long.TYPE == type || Long.class.equals(type)) {
return Long.valueOf(number.longValue());
}
if (Double.TYPE == type || Double.class.equals(type)) {
return Double.valueOf(number.doubleValue());
}
if (Integer.TYPE == type || Integer.class.equals(type)) {
return Integer.valueOf(number.intValue());
}
if (BigInteger.class.equals(type)) {
if (number instanceof BigDecimal) {
return ((BigDecimal) number).toBigInteger();
}
if (number instanceof BigInteger) {
return number;
}
return BigInteger.valueOf(number.longValue());
}
if (BigDecimal.class.equals(type)) {
if (number instanceof BigDecimal) {
return number;
}
if (number instanceof BigInteger) {
return new BigDecimal((BigInteger) number);
}
if (number instanceof Long) {
return new BigDecimal((Long) number);
}
return new BigDecimal(number.doubleValue());
}
if (Byte.TYPE == type || Byte.class.equals(type)) {
return Byte.valueOf(number.byteValue());
}
if (Short.TYPE == type || Short.class.equals(type)) {
return Short.valueOf(number.shortValue());
}
if (Float.TYPE == type || Float.class.equals(type)) {
return Float.valueOf(number.floatValue());
}
throw new IllegalArgumentException(MessageFactory.get("error.convert",
number, number.getClass(), type));
}
public final static Number coerceToNumber(final Object obj, final Class type)
throws IllegalArgumentException {
if (obj == null || "".equals(obj)) {
return coerceToNumber(ZERO, type);
}
if (obj instanceof String) {
return coerceToNumber((String) obj, type);
}
if (ELArithmetic.isNumber(obj)) {
if (obj.getClass().equals(type)) {
return (Number) obj;
}
return coerceToNumber((Number) obj, type);
}
if (obj instanceof Character) {
return coerceToNumber(Short.valueOf((short) ((Character) obj)
.charValue()), type);
}
throw new IllegalArgumentException(MessageFactory.get("error.convert",
obj, obj.getClass(), type));
}
protected final static Number coerceToNumber(final String val,
final Class type) throws IllegalArgumentException {
if (Long.TYPE == type || Long.class.equals(type)) {
return Long.valueOf(val);
}
if (Integer.TYPE == type || Integer.class.equals(type)) {
return Integer.valueOf(val);
}
if (Double.TYPE == type || Double.class.equals(type)) {
return Double.valueOf(val);
}
if (BigInteger.class.equals(type)) {
return new BigInteger(val);
}
if (BigDecimal.class.equals(type)) {
return new BigDecimal(val);
}
if (Byte.TYPE == type || Byte.class.equals(type)) {
return Byte.valueOf(val);
}
if (Short.TYPE == type || Short.class.equals(type)) {
return Short.valueOf(val);
}
if (Float.TYPE == type || Float.class.equals(type)) {
return Float.valueOf(val);
}
throw new IllegalArgumentException(MessageFactory.get("error.convert",
val, String.class, type));
}
/**
* @param obj
* @return
*/
public final static String coerceToString(final Object obj) {
if (obj == null) {
return "";
} else if (obj instanceof String) {
return (String) obj;
} else if (obj instanceof Enum) {
return ((Enum) obj).name();
} else {
return obj.toString();
}
}
public final static void checkType(final Object obj, final Class type)
throws IllegalArgumentException {
if (String.class.equals(type)) {
coerceToString(obj);
}
if (ELArithmetic.isNumberType(type)) {
coerceToNumber(obj, type);
}
if (Character.class.equals(type) || Character.TYPE == type) {
coerceToCharacter(obj);
}
if (Boolean.class.equals(type) || Boolean.TYPE == type) {
coerceToBoolean(obj);
}
if (type.isEnum()) {
coerceToEnum(obj, type);
}
}
public final static Object coerceToType(final Object obj, final Class type)
throws IllegalArgumentException {
if (type == null || Object.class.equals(type) ||
(obj != null && type.isAssignableFrom(obj.getClass()))) {
return obj;
}
if (String.class.equals(type)) {
return coerceToString(obj);
}
if (ELArithmetic.isNumberType(type)) {
return coerceToNumber(obj, type);
}
if (Character.class.equals(type) || Character.TYPE == type) {
return coerceToCharacter(obj);
}
if (Boolean.class.equals(type) || Boolean.TYPE == type) {
return coerceToBoolean(obj);
}
if (type.isEnum()) {
return coerceToEnum(obj, type);
}
// new to spec
if (obj == null)
return null;
if (obj instanceof String) {
if ("".equals(obj))
return null;
PropertyEditor editor = PropertyEditorManager.findEditor(type);
if (editor != null) {
editor.setAsText((String) obj);
return editor.getValue();
}
}
throw new IllegalArgumentException(MessageFactory.get("error.convert",
obj, obj.getClass(), type));
}
/**
* @param obj
* @return
*/
public final static boolean containsNulls(final Object[] obj) {
for (int i = 0; i < obj.length; i++) {
if (obj[0] == null) {
return true;
}
}
return false;
}
public final static boolean isBigDecimalOp(final Object obj0,
final Object obj1) {
return (obj0 instanceof BigDecimal || obj1 instanceof BigDecimal);
}
public final static boolean isBigIntegerOp(final Object obj0,
final Object obj1) {
return (obj0 instanceof BigInteger || obj1 instanceof BigInteger);
}
public final static boolean isDoubleOp(final Object obj0, final Object obj1) {
return (obj0 instanceof Double
|| obj1 instanceof Double
|| obj0 instanceof Float
|| obj1 instanceof Float);
}
public final static boolean isDoubleStringOp(final Object obj0,
final Object obj1) {
return (isDoubleOp(obj0, obj1)
|| (obj0 instanceof String && isStringFloat((String) obj0)) || (obj1 instanceof String && isStringFloat((String) obj1)));
}
public final static boolean isLongOp(final Object obj0, final Object obj1) {
return (obj0 instanceof Long
|| obj1 instanceof Long
|| obj0 instanceof Integer
|| obj1 instanceof Integer
|| obj0 instanceof Character
|| obj1 instanceof Character
|| obj0 instanceof Short
|| obj1 instanceof Short
|| obj0 instanceof Byte
|| obj1 instanceof Byte);
}
public final static boolean isStringFloat(final String str) {
int len = str.length();
if (len > 1) {
for (int i = 0; i < len; i++) {
switch (str.charAt(i)) {
case 'E':
return true;
case 'e':
return true;
case '.':
return true;
}
}
}
return false;
}
public final static Number toFloat(final String value) {
try {
if (Double.parseDouble(value) > Double.MAX_VALUE) {
return new BigDecimal(value);
} else {
return Double.valueOf(value);
}
} catch (NumberFormatException e0) {
return new BigDecimal(value);
}
}
public final static Number toNumber(final String value) {
try {
return Integer.valueOf(Integer.parseInt(value));
} catch (NumberFormatException e0) {
try {
return Long.valueOf(Long.parseLong(value));
} catch (NumberFormatException e1) {
return new BigInteger(value);
}
}
}
/**
*
*/
public ELSupport() {
super();
}
}