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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.value;
import static javax.jcr.PropertyType.BINARY;
import static javax.jcr.PropertyType.BOOLEAN;
import static javax.jcr.PropertyType.DATE;
import static javax.jcr.PropertyType.DECIMAL;
import static javax.jcr.PropertyType.DOUBLE;
import static javax.jcr.PropertyType.LONG;
import static javax.jcr.PropertyType.NAME;
import static javax.jcr.PropertyType.PATH;
import static javax.jcr.PropertyType.REFERENCE;
import static javax.jcr.PropertyType.STRING;
import static javax.jcr.PropertyType.UNDEFINED;
import static javax.jcr.PropertyType.WEAKREFERENCE;
import com.google.common.collect.ImmutableSet;
import org.apache.jackrabbit.util.Base64;
import org.apache.jackrabbit.util.Text;
import org.apache.jackrabbit.util.TransientFileFactory;
import javax.jcr.PropertyType;
import javax.jcr.RepositoryException;
import javax.jcr.Value;
import javax.jcr.ValueFormatException;
import javax.jcr.ValueFactory;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.FilterInputStream;
import java.io.OutputStream;
import java.io.BufferedOutputStream;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
/**
* The ValueHelper class provides several Value
* related utility methods.
*/
public class ValueHelper {
/**
* empty private constructor
*/
private ValueHelper() {
}
private static final Map> SUPPORTED_CONVERSIONS = new HashMap>();
static {
SUPPORTED_CONVERSIONS.put(DATE, ImmutableSet.of(STRING, BINARY, DOUBLE, DECIMAL, LONG));
SUPPORTED_CONVERSIONS.put(DOUBLE, ImmutableSet.of(STRING, BINARY, DECIMAL, DATE, LONG));
SUPPORTED_CONVERSIONS.put(DECIMAL, ImmutableSet.of(STRING, BINARY, DOUBLE, DATE, LONG));
SUPPORTED_CONVERSIONS.put(LONG, ImmutableSet.of(STRING, BINARY, DECIMAL, DATE, DOUBLE));
SUPPORTED_CONVERSIONS.put(BOOLEAN, ImmutableSet.of(STRING, BINARY));
SUPPORTED_CONVERSIONS.put(NAME, ImmutableSet.of(STRING, BINARY, PATH, PropertyType.URI));
SUPPORTED_CONVERSIONS.put(PATH, ImmutableSet.of(STRING, BINARY, NAME, PropertyType.URI));
SUPPORTED_CONVERSIONS.put(PropertyType.URI, ImmutableSet.of(STRING, BINARY, NAME, PATH));
SUPPORTED_CONVERSIONS.put(REFERENCE, ImmutableSet.of(STRING, BINARY, WEAKREFERENCE));
SUPPORTED_CONVERSIONS.put(WEAKREFERENCE, ImmutableSet.of(STRING, BINARY, REFERENCE));
}
public static boolean isSupportedConversion(int fromType, int toType) {
if (fromType == toType) {
return true;
} else if (STRING == fromType || BINARY == fromType) {
return true;
} else {
return SUPPORTED_CONVERSIONS.containsKey(fromType) && SUPPORTED_CONVERSIONS.get(fromType).contains(toType);
}
}
public static void checkSupportedConversion(int fromType, int toType) throws ValueFormatException {
if (!isSupportedConversion(fromType, toType)) {
throw new ValueFormatException("Unsupported conversion from '" + PropertyType.nameFromValue(fromType) + "' to '" + PropertyType.nameFromValue(toType) + '\'');
}
}
/**
* @param srcValue
* @param targetType
* @param factory
* @throws ValueFormatException
* @throws IllegalArgumentException
* @see #convert(Value, int, ValueFactory)
*/
public static Value convert(String srcValue, int targetType, ValueFactory factory)
throws ValueFormatException, IllegalArgumentException {
if (srcValue == null) {
return null;
} else {
return factory.createValue(srcValue, targetType);
}
}
/**
* @param srcValue
* @param targetType
* @param factory
* @throws ValueFormatException
* @throws IllegalArgumentException
*/
public static Value convert(InputStream srcValue, int targetType, ValueFactory factory)
throws ValueFormatException, IllegalArgumentException {
if (srcValue == null) {
return null;
} else {
return convert(factory.createValue(srcValue), targetType, factory);
}
}
/**
* Same as {@link #convert(String[], int, ValueFactory)} using
* ValueFactoryImpl.
*
* @param srcValues
* @param targetType
* @throws ValueFormatException
* @throws IllegalArgumentException
* @see #convert(Value, int, ValueFactory)
*/
public static Value[] convert(String[] srcValues, int targetType, ValueFactory factory)
throws ValueFormatException, IllegalArgumentException {
if (srcValues == null) {
return null;
}
Value[] newValues = new Value[srcValues.length];
for (int i = 0; i < srcValues.length; i++) {
newValues[i] = convert(srcValues[i], targetType, factory);
}
return newValues;
}
/**
* @param srcValues
* @param targetType
* @throws ValueFormatException
* @throws IllegalArgumentException
* @see #convert(Value, int, ValueFactory)
*/
public static Value[] convert(InputStream[] srcValues, int targetType,
ValueFactory factory)
throws ValueFormatException, IllegalArgumentException {
if (srcValues == null) {
return null;
}
Value[] newValues = new Value[srcValues.length];
for (int i = 0; i < srcValues.length; i++) {
newValues[i] = convert(srcValues[i], targetType, factory);
}
return newValues;
}
/**
* @param srcValues
* @param targetType
* @param factory
* @throws ValueFormatException
* @throws IllegalArgumentException
* @see #convert(Value, int, ValueFactory)
*/
public static Value[] convert(Value[] srcValues, int targetType,
ValueFactory factory)
throws ValueFormatException, IllegalArgumentException {
if (srcValues == null) {
return null;
}
Value[] newValues = new Value[srcValues.length];
int srcValueType = PropertyType.UNDEFINED;
for (int i = 0; i < srcValues.length; i++) {
if (srcValues[i] == null) {
newValues[i] = null;
continue;
}
// check type of values
if (srcValueType == PropertyType.UNDEFINED) {
srcValueType = srcValues[i].getType();
} else if (srcValueType != srcValues[i].getType()) {
// inhomogeneous types
String msg = "inhomogeneous type of values";
throw new ValueFormatException(msg);
}
newValues[i] = convert(srcValues[i], targetType, factory);
}
return newValues;
}
/**
* Converts the given value to a value of the specified target type.
* The conversion is performed according to the rules described in
* "3.6.4 Property Type Conversion" in the JSR 283 specification.
*
* @param srcValue
* @param targetType
* @param factory
* @throws ValueFormatException
* @throws IllegalStateException
* @throws IllegalArgumentException
*/
public static Value convert(Value srcValue, int targetType, ValueFactory factory)
throws ValueFormatException, IllegalStateException,
IllegalArgumentException {
if (srcValue == null) {
return null;
}
Value val;
int srcType = srcValue.getType();
if (srcType == targetType) {
// no conversion needed, return original value
return srcValue;
}
switch (targetType) {
case PropertyType.STRING:
// convert to STRING
try {
val = factory.createValue(srcValue.getString());
} catch (RepositoryException re) {
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType), re);
}
break;
case PropertyType.BINARY:
// convert to BINARY
try {
val = factory.createValue(srcValue.getBinary());
} catch (RepositoryException re) {
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType), re);
}
break;
case PropertyType.BOOLEAN:
// convert to BOOLEAN
try {
val = factory.createValue(srcValue.getBoolean());
} catch (RepositoryException re) {
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType), re);
}
break;
case PropertyType.DATE:
// convert to DATE
try {
val = factory.createValue(srcValue.getDate());
} catch (RepositoryException re) {
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType), re);
}
break;
case PropertyType.DOUBLE:
// convert to DOUBLE
try {
val = factory.createValue(srcValue.getDouble());
} catch (RepositoryException re) {
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType), re);
}
break;
case PropertyType.LONG:
// convert to LONG
try {
val = factory.createValue(srcValue.getLong());
} catch (RepositoryException re) {
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType), re);
}
break;
case PropertyType.DECIMAL:
// convert to DECIMAL
try {
val = factory.createValue(srcValue.getDecimal());
} catch (RepositoryException re) {
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType), re);
}
break;
case PropertyType.PATH:
// convert to PATH
switch (srcType) {
case PropertyType.PATH:
// no conversion needed, return original value
// (redundant code, just here for the sake of clarity)
return srcValue;
case PropertyType.BINARY:
case PropertyType.STRING:
case PropertyType.NAME: // a name is always also a relative path
// try conversion via string
String path;
try {
// get string value
path = srcValue.getString();
} catch (RepositoryException re) {
// should never happen
throw new ValueFormatException("failed to convert source value to PATH value",
re);
}
// the following call will throw ValueFormatException
// if p is not a valid PATH
val = factory.createValue(path, targetType);
break;
case PropertyType.URI:
URI uri;
try {
uri = URI.create(srcValue.getString());
} catch (RepositoryException re) {
// should never happen
throw new ValueFormatException("failed to convert source value to PATH value",
re);
}
if (uri.isAbsolute()) {
// uri contains scheme...
throw new ValueFormatException("failed to convert URI value to PATH value");
}
String p = uri.getPath();
if (p.startsWith("./")) {
p = p.substring(2);
}
// the following call will throw ValueFormatException
// if p is not a valid PATH
val = factory.createValue(p, targetType);
break;
case PropertyType.BOOLEAN:
case PropertyType.DATE:
case PropertyType.DOUBLE:
case PropertyType.DECIMAL:
case PropertyType.LONG:
case PropertyType.REFERENCE:
case PropertyType.WEAKREFERENCE:
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType));
default:
throw new IllegalArgumentException("not a valid type constant: " + srcType);
}
break;
case PropertyType.NAME:
// convert to NAME
switch (srcType) {
case PropertyType.NAME:
// no conversion needed, return original value
// (redundant code, just here for the sake of clarity)
return srcValue;
case PropertyType.BINARY:
case PropertyType.STRING:
case PropertyType.PATH: // path might be a name (relative path of length 1)
// try conversion via string
String name;
try {
// get string value
name = srcValue.getString();
} catch (RepositoryException re) {
// should never happen
throw new ValueFormatException("failed to convert source value to NAME value",
re);
}
// the following call will throw ValueFormatException
// if p is not a valid NAME
val = factory.createValue(name, targetType);
break;
case PropertyType.URI:
URI uri;
try {
uri = URI.create(srcValue.getString());
} catch (RepositoryException re) {
// should never happen
throw new ValueFormatException("failed to convert source value to NAME value",
re);
}
if (uri.isAbsolute()) {
// uri contains scheme...
throw new ValueFormatException("failed to convert URI value to NAME value");
}
String p = uri.getPath();
if (p.startsWith("./")) {
p = p.substring(2);
}
// the following call will throw ValueFormatException
// if p is not a valid NAME
val = factory.createValue(p, targetType);
break;
case PropertyType.BOOLEAN:
case PropertyType.DATE:
case PropertyType.DOUBLE:
case PropertyType.DECIMAL:
case PropertyType.LONG:
case PropertyType.REFERENCE:
case PropertyType.WEAKREFERENCE:
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType));
default:
throw new IllegalArgumentException("not a valid type constant: " + srcType);
}
break;
case PropertyType.REFERENCE:
// convert to REFERENCE
switch (srcType) {
case PropertyType.REFERENCE:
// no conversion needed, return original value
// (redundant code, just here for the sake of clarity)
return srcValue;
case PropertyType.BINARY:
case PropertyType.STRING:
case PropertyType.WEAKREFERENCE:
// try conversion via string
String uuid;
try {
// get string value
uuid = srcValue.getString();
} catch (RepositoryException re) {
// should never happen
throw new ValueFormatException("failed to convert source value to REFERENCE value", re);
}
val = factory.createValue(uuid, targetType);
break;
case PropertyType.BOOLEAN:
case PropertyType.DATE:
case PropertyType.DOUBLE:
case PropertyType.LONG:
case PropertyType.DECIMAL:
case PropertyType.PATH:
case PropertyType.URI:
case PropertyType.NAME:
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType));
default:
throw new IllegalArgumentException("not a valid type constant: " + srcType);
}
break;
case PropertyType.WEAKREFERENCE:
// convert to WEAKREFERENCE
switch (srcType) {
case PropertyType.WEAKREFERENCE:
// no conversion needed, return original value
// (redundant code, just here for the sake of clarity)
return srcValue;
case PropertyType.BINARY:
case PropertyType.STRING:
case PropertyType.REFERENCE:
// try conversion via string
String uuid;
try {
// get string value
uuid = srcValue.getString();
} catch (RepositoryException re) {
// should never happen
throw new ValueFormatException("failed to convert source value to WEAKREFERENCE value", re);
}
val = factory.createValue(uuid, targetType);
break;
case PropertyType.BOOLEAN:
case PropertyType.DATE:
case PropertyType.DOUBLE:
case PropertyType.LONG:
case PropertyType.DECIMAL:
case PropertyType.URI:
case PropertyType.PATH:
case PropertyType.NAME:
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType));
default:
throw new IllegalArgumentException("not a valid type constant: " + srcType);
}
break;
case PropertyType.URI:
// convert to URI
switch (srcType) {
case PropertyType.URI:
// no conversion needed, return original value
// (redundant code, just here for the sake of clarity)
return srcValue;
case PropertyType.BINARY:
case PropertyType.STRING:
// try conversion via string
String uuid;
try {
// get string value
uuid = srcValue.getString();
} catch (RepositoryException re) {
// should never happen
throw new ValueFormatException("failed to convert source value to URI value", re);
}
val = factory.createValue(uuid, targetType);
break;
case PropertyType.NAME:
String name;
try {
// get string value
name = srcValue.getString();
} catch (RepositoryException re) {
// should never happen
throw new ValueFormatException("failed to convert source value to URI value", re);
}
// prefix name with "./" (jsr 283 spec 3.6.4.8)
val = factory.createValue("./" + name, targetType);
break;
case PropertyType.PATH:
String path;
try {
// get string value
path = srcValue.getString();
} catch (RepositoryException re) {
// should never happen
throw new ValueFormatException("failed to convert source value to URI value", re);
}
if (!path.startsWith("/")) {
// prefix non-absolute path with "./" (jsr 283 spec 3.6.4.9)
path = "./" + path;
}
val = factory.createValue(path, targetType);
break;
case PropertyType.BOOLEAN:
case PropertyType.DATE:
case PropertyType.DOUBLE:
case PropertyType.LONG:
case PropertyType.DECIMAL:
case PropertyType.REFERENCE:
case PropertyType.WEAKREFERENCE:
throw new ValueFormatException("conversion failed: "
+ PropertyType.nameFromValue(srcType) + " to "
+ PropertyType.nameFromValue(targetType));
default:
throw new IllegalArgumentException("not a valid type constant: " + srcType);
}
break;
default:
throw new IllegalArgumentException("not a valid type constant: " + targetType);
}
return val;
}
/**
*
* @param srcValue
* @param factory
* @throws IllegalStateException
*/
public static Value copy(Value srcValue, ValueFactory factory)
throws IllegalStateException {
if (srcValue == null) {
return null;
}
Value newVal = null;
try {
switch (srcValue.getType()) {
case PropertyType.BINARY:
newVal = factory.createValue(srcValue.getStream());
break;
case PropertyType.BOOLEAN:
newVal = factory.createValue(srcValue.getBoolean());
break;
case PropertyType.DATE:
newVal = factory.createValue(srcValue.getDate());
break;
case PropertyType.DOUBLE:
newVal = factory.createValue(srcValue.getDouble());
break;
case PropertyType.LONG:
newVal = factory.createValue(srcValue.getLong());
break;
case PropertyType.DECIMAL:
newVal = factory.createValue(srcValue.getDecimal());
break;
case PropertyType.PATH:
case PropertyType.NAME:
case PropertyType.REFERENCE:
case PropertyType.WEAKREFERENCE:
case PropertyType.URI:
newVal = factory.createValue(srcValue.getString(), srcValue.getType());
break;
case PropertyType.STRING:
newVal = factory.createValue(srcValue.getString());
break;
}
} catch (RepositoryException re) {
// should never get here
}
return newVal;
}
/**
* @param srcValues
* @param factory
* @throws IllegalStateException
*/
public static Value[] copy(Value[] srcValues, ValueFactory factory)
throws IllegalStateException {
if (srcValues == null) {
return null;
}
Value[] newValues = new Value[srcValues.length];
for (int i = 0; i < srcValues.length; i++) {
newValues[i] = copy(srcValues[i], factory);
}
return newValues;
}
/**
* Serializes the given value to a String. The serialization
* format is the same as used by Document & System View XML, i.e.
* binary values will be Base64-encoded whereas for all others
* {@link Value#getString()} will be used.
*
* @param value the value to be serialized
* @param encodeBlanks if true space characters will be encoded
* as "_x0020_" within he output string.
* @return a string representation of the given value.
* @throws IllegalStateException if the given value is in an illegal state
* @throws RepositoryException if an error occured during the serialization.
*/
public static String serialize(Value value, boolean encodeBlanks)
throws IllegalStateException, RepositoryException {
StringWriter writer = new StringWriter();
try {
serialize(value, encodeBlanks, false, writer);
} catch (IOException ioe) {
throw new RepositoryException("failed to serialize value",
ioe);
}
return writer.toString();
}
/**
* Outputs the serialized value to a Writer. The serialization
* format is the same as used by Document & System View XML, i.e.
* binary values will be Base64-encoded whereas for all others
* {@link Value#getString()} will be used for serialization.
*
* @param value the value to be serialized
* @param encodeBlanks if true space characters will be encoded
* as "_x0020_" within he output string.
* @param enforceBase64 if true, base64 encoding will always be used
* @param writer writer to output the encoded data
* @throws IllegalStateException if the given value is in an illegal state
* @throws IOException if an i/o error occured during the
* serialization
* @throws RepositoryException if an error occured during the serialization.
*/
public static void serialize(Value value, boolean encodeBlanks, boolean enforceBase64,
Writer writer)
throws IllegalStateException, IOException, RepositoryException {
if (value.getType() == PropertyType.BINARY) {
// binary data, base64 encoding required;
// the encodeBlanks flag can be ignored since base64-encoded
// data cannot contain space characters
InputStream in = value.getStream();
try {
Base64.encode(in, writer);
// no need to close StringWriter
//writer.close();
} finally {
try {
in.close();
} catch (IOException e) {
// ignore
}
}
} else {
String textVal = value.getString();
if (enforceBase64) {
byte bytes[] = textVal.getBytes("UTF-8");
Base64.encode(bytes, 0, bytes.length, writer);
}
else {
if (encodeBlanks) {
// enocde blanks in string
textVal = Text.replace(textVal, " ", "_x0020_");
}
writer.write(textVal);
}
}
}
/**
* Deserializes the given string to a Value of the given type.
*
* @param value string to be deserialized
* @param type type of value
* @param decodeBlanks if true"_x0020_"
* character sequences will be decoded to single space
* characters each.
* @param factory ValueFactory used to build the Value object.
* @return the deserialized Value
* @throws ValueFormatException if the string data is not of the required
* format
* @throws RepositoryException if an error occured during the
* deserialization.
*/
public static Value deserialize(String value, int type, boolean decodeBlanks,
ValueFactory factory)
throws ValueFormatException, RepositoryException {
if (type == PropertyType.BINARY) {
// base64 encoded binary value;
// the encodeBlanks flag can be ignored since base64-encoded
// data cannot contain encoded space characters
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
Base64.decode(value, baos);
// no need to close ByteArrayOutputStream
//baos.close();
} catch (IOException ioe) {
throw new RepositoryException("failed to decode binary value",
ioe);
}
// NOTE: for performance reasons the BinaryValue is created directly
// from the byte-array. This is inconsistent with the other calls,
// that delegate the value creation to the ValueFactory.
return new BinaryValue(baos.toByteArray());
} else {
if (decodeBlanks) {
// decode encoded blanks in value
value = Text.replace(value, "_x0020_", " ");
}
return convert(value, type, factory);
}
}
/**
* Deserializes the string data read from the given reader to a
* Value of the given type.
*
* @param reader reader for the string data to be deserialized
* @param type type of value
* @param decodeBlanks if true"_x0020_"
* character sequences will be decoded to single space
* characters each.
* @param factory ValueFactory used to build the Value object.
* @return the deserialized Value
* @throws IOException if an i/o error occured during the
* serialization
* @throws ValueFormatException if the string data is not of the required
* format
* @throws RepositoryException if an error occured during the
* deserialization.
*/
public static Value deserialize(Reader reader, int type,
boolean decodeBlanks, ValueFactory factory)
throws IOException, ValueFormatException, RepositoryException {
if (type == PropertyType.BINARY) {
// base64 encoded binary value;
// the encodeBlanks flag can be ignored since base64-encoded
// data cannot contain encoded space characters
// decode to temp file
TransientFileFactory fileFactory = TransientFileFactory.getInstance();
final File tmpFile = fileFactory.createTransientFile("bin", null, null);
OutputStream out = new BufferedOutputStream(new FileOutputStream(tmpFile));
try {
Base64.decode(reader, out);
} finally {
out.close();
}
// create an InputStream that keeps a hard reference to the temp file
// in order to prevent its automatic deletion once the associated
// File object is reclaimed by the garbage collector;
// pass InputStream wrapper to ValueFactory, that creates a BinaryValue.
return factory.createValue(new FilterInputStream(new FileInputStream(tmpFile)) {
public void close() throws IOException {
in.close();
// temp file can now safely be removed
tmpFile.delete();
}
});
/*
ByteArrayOutputStream baos = new ByteArrayOutputStream();
Base64.decode(reader, baos);
// no need to close ByteArrayOutputStream
//baos.close();
return new BinaryValue(baos.toByteArray());
*/
} else {
char[] chunk = new char[8192];
int read;
StringBuilder buf = new StringBuilder();
while ((read = reader.read(chunk)) > -1) {
buf.append(chunk, 0, read);
}
String value = buf.toString();
if (decodeBlanks) {
// decode encoded blanks in value
value = Text.replace(value, "_x0020_", " ");
}
return convert(value, type, factory);
}
}
/**
* Determine the {@link javax.jcr.PropertyType} of the passed values if all are of
* the same type.
*
* @param values array of values of the same type
* @return {@link javax.jcr.PropertyType#UNDEFINED} if {@code values} is empty,
* {@code values[0].getType()} otherwise.
* @throws javax.jcr.ValueFormatException if not all {@code values} are of the same type
*/
public static int getType(Value[] values) throws ValueFormatException {
int type = UNDEFINED;
for (Value value : values) {
if (value != null) {
if (type == UNDEFINED) {
type = value.getType();
} else if (value.getType() != type) {
throw new ValueFormatException(
"All values of a multi-valued property must be of the same type");
}
}
}
return type;
}
}
