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// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
package jodd.props;
import jodd.util.CharUtil;
import jodd.util.StringPool;
import jodd.util.StringUtil;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
/**
* {@link Props} parser.
*/
public class PropsParser implements Cloneable {
protected static final String PROFILE_LEFT = "<";
protected static final String PROFILE_RIGHT = ">";
protected final PropsData propsData;
/**
* Value that will be inserted when escaping the new line.
*/
protected String escapeNewLineValue = StringPool.EMPTY;
/**
* Trims left the value.
*/
protected boolean valueTrimLeft = true;
/**
* Trims right the value.
*/
protected boolean valueTrimRight = true;
/**
* Defines if starting whitespaces when value is split in the new line
* should be ignored or not.
*/
protected boolean ignorePrefixWhitespacesOnNewLine = true;
/**
* Defines if multi-line values may be written using triple-quotes
* as in python.
*/
protected boolean multilineValues = true;
/**
* Don't include empty properties.
*/
protected boolean skipEmptyProps = true;
public PropsParser() {
this.propsData = new PropsData();
}
public PropsParser(final PropsData propsData) {
this.propsData = propsData;
}
public PropsData getPropsData() {
return propsData;
}
@Override
public PropsParser clone() {
final PropsParser pp = new PropsParser(this.propsData.clone());
pp.escapeNewLineValue = escapeNewLineValue;
pp.valueTrimLeft = valueTrimLeft;
pp.valueTrimRight = valueTrimRight;
pp.ignorePrefixWhitespacesOnNewLine = ignorePrefixWhitespacesOnNewLine;
pp.skipEmptyProps = skipEmptyProps;
pp.multilineValues = multilineValues;
return pp;
}
/**
* Parsing states.
*/
protected enum ParseState {
TEXT,
ESCAPE,
ESCAPE_NEWLINE,
COMMENT,
VALUE
}
/**
* Different assignment operators.
*/
protected enum Operator {
ASSIGN,
QUICK_APPEND,
COPY
}
/**
* Loads properties.
*/
public void parse(final String in) {
ParseState state = ParseState.TEXT;
ParseState stateOnEscape = null;
boolean insideSection = false;
String currentSection = null;
String key = null;
Operator operator = Operator.ASSIGN;
final StringBuilder sb = new StringBuilder();
final int len = in.length();
int ndx = 0;
while (ndx < len) {
final char c = in.charAt(ndx);
ndx++;
if (state == ParseState.COMMENT) {
// comment, skip to the end of the line
if (c == '\r') {
if ((ndx < len) && (in.charAt(ndx) == '\n')) {
ndx++;
}
state = ParseState.TEXT;
}
else if (c == '\n') {
state = ParseState.TEXT;
}
} else if (state == ParseState.ESCAPE) {
state = stateOnEscape; //ParseState.VALUE;
switch (c) {
case '\r':
if ((ndx < len) && (in.charAt(ndx) == '\n')) {
ndx++;
}
case '\n':
// need to go 1 step back in order to escape
// the current line ending in the follow-up state
ndx--;
state = ParseState.ESCAPE_NEWLINE;
break;
// encode UTF character
case 'u':
int value = 0;
for (int i = 0; i < 4; i++) {
final char hexChar = in.charAt(ndx++);
if (CharUtil.isDigit(hexChar)) {
value = (value << 4) + hexChar - '0';
} else if (hexChar >= 'a' && hexChar <= 'f') {
value = (value << 4) + 10 + hexChar - 'a';
} else if (hexChar >= 'A' && hexChar <= 'F') {
value = (value << 4) + 10 + hexChar - 'A';
} else {
throw new IllegalArgumentException("Malformed \\uXXXX encoding.");
}
}
sb.append((char) value);
break;
case 't':
sb.append('\t');
break;
case 'n':
sb.append('\n');
break;
case 'r':
sb.append('\r');
break;
case 'f':
sb.append('\f');
break;
default:
sb.append(c);
}
} else if (state == ParseState.TEXT) {
switch (c) {
case '\\':
// escape char, take the next char as is
stateOnEscape = state;
state = ParseState.ESCAPE;
break;
// start section
case '[':
if (sb.length() > 0) {
if (StringUtil.isNotBlank(sb)) {
sb.append(c);
// previous string is not blank, hence it's not the section
break;
}
}
sb.setLength(0);
insideSection = true;
break;
// end section
case ']':
if (insideSection) {
currentSection = sb.toString().trim();
sb.setLength(0);
insideSection = false;
if (currentSection.length() == 0) {
currentSection = null;
}
} else {
sb.append(c);
}
break;
case '#':
case ';':
state = ParseState.COMMENT;
break;
// copy operator
case '<':
if (ndx == len || in.charAt(ndx) != '=') {
sb.append(c);
break;
}
operator = Operator.COPY;
//ndx++;
continue;
// assignment operator
case '+':
if (ndx == len || in.charAt(ndx) != '=') {
sb.append(c);
break;
}
operator = Operator.QUICK_APPEND;
//ndx++;
continue;
case '=':
case ':':
if (key == null) {
key = sb.toString().trim();
sb.setLength(0);
} else {
sb.append(c);
}
state = ParseState.VALUE;
break;
case '\r':
case '\n':
add(currentSection, key, sb, true, operator);
sb.setLength(0);
key = null;
operator = Operator.ASSIGN;
break;
case ' ':
case '\t':
// ignore whitespaces
break;
default:
sb.append(c);
}
} else {
switch (c) {
case '\\':
// escape char, take the next char as is
stateOnEscape = state;
state = ParseState.ESCAPE;
break;
case '\r':
if ((ndx < len) && (in.charAt(ndx) == '\n')) {
ndx++;
}
case '\n':
if (state == ParseState.ESCAPE_NEWLINE) {
sb.append(escapeNewLineValue);
if (!ignorePrefixWhitespacesOnNewLine) {
state = ParseState.VALUE;
}
} else {
add(currentSection, key, sb, true, operator);
sb.setLength(0);
key = null;
operator = Operator.ASSIGN;
// end of value, continue to text
state = ParseState.TEXT;
}
break;
case ' ':
case '\t':
if (state == ParseState.ESCAPE_NEWLINE) {
break;
}
default:
sb.append(c);
state = ParseState.VALUE;
if (multilineValues) {
if (sb.length() == 3) {
// check for ''' beginning
if (sb.toString().equals("'''")) {
sb.setLength(0);
int endIndex = in.indexOf("'''", ndx);
if (endIndex == -1) {
endIndex = in.length();
}
sb.append(in, ndx, endIndex);
// append
add(currentSection, key, sb, false, operator);
sb.setLength(0);
key = null;
operator = Operator.ASSIGN;
// end of value, continue to text
state = ParseState.TEXT;
ndx = endIndex + 3;
}
}
}
}
}
}
if (key != null) {
add(currentSection, key, sb, true, operator);
}
}
// ---------------------------------------------------------------- add
/**
* Adds accumulated value to key and current section.
*/
protected void add(
final String section, final String key,
final StringBuilder value, final boolean trim, final Operator operator) {
// ignore lines without : or =
if (key == null) {
return;
}
String fullKey = key;
if (section != null) {
if (fullKey.length() != 0) {
fullKey = section + '.' + fullKey;
} else {
fullKey = section;
}
}
String v = value.toString();
if (trim) {
if (valueTrimLeft && valueTrimRight) {
v = v.trim();
} else if (valueTrimLeft) {
v = StringUtil.trimLeft(v);
} else {
v = StringUtil.trimRight(v);
}
}
if (v.length() == 0 && skipEmptyProps) {
return;
}
extractProfilesAndAdd(fullKey, v, operator);
}
/**
* Extracts profiles from the key name and adds key-value to them.
*/
protected void extractProfilesAndAdd(final String key, final String value, final Operator operator) {
String fullKey = key;
int ndx = fullKey.indexOf(PROFILE_LEFT);
if (ndx == -1) {
justAdd(fullKey, value, null, operator);
return;
}
// extract profiles
ArrayList keyProfiles = new ArrayList<>();
while (true) {
ndx = fullKey.indexOf(PROFILE_LEFT);
if (ndx == -1) {
break;
}
final int len = fullKey.length();
int ndx2 = fullKey.indexOf(PROFILE_RIGHT, ndx + 1);
if (ndx2 == -1) {
ndx2 = len;
}
// remember profile
final String profile = fullKey.substring(ndx + 1, ndx2);
keyProfiles.add(profile);
// extract profile from key
ndx2++;
final String right = (ndx2 == len) ? StringPool.EMPTY : fullKey.substring(ndx2);
fullKey = fullKey.substring(0, ndx) + right;
}
if (fullKey.startsWith(StringPool.DOT)) {
// check for special case when only profile is defined in section
fullKey = fullKey.substring(1);
}
// add value to extracted profiles
justAdd(fullKey, value, keyProfiles, operator);
}
/**
* Core key-value addition.
*/
protected void justAdd(final String key, final String value, final ArrayList keyProfiles, final Operator operator) {
if (operator == Operator.COPY) {
HashMap target = new HashMap<>();
String[] profiles = null;
if (keyProfiles != null) {
profiles = keyProfiles.toArray(new String[0]);
}
String[] sources = StringUtil.splitc(value, ',');
for (String source : sources) {
source = source.trim();
// try to extract profile for parsing
String[] lookupProfiles = profiles;
String lookupProfilesString = null;
int leftIndex = source.indexOf('<');
if (leftIndex != -1) {
int rightIndex = source.indexOf('>');
lookupProfilesString = source.substring(leftIndex + 1, rightIndex);
source = source.substring(0, leftIndex).concat(source.substring(rightIndex + 1));
lookupProfiles = StringUtil.splitc(lookupProfilesString, ',');
StringUtil.trimAll(lookupProfiles);
}
String[] wildcards = new String[] {source + ".*"};
propsData.extract(target, lookupProfiles, wildcards, null);
for (Map.Entry entry : target.entrySet()) {
String entryKey = entry.getKey();
String suffix = entryKey.substring(source.length());
String newKey = key + suffix;
String newValue = "${" + entryKey;
if (lookupProfilesString != null) {
newValue += "<" + lookupProfilesString + ">";
}
newValue += "}";
if (profiles == null) {
propsData.putBaseProperty(newKey, newValue, false);
} else {
for (final String p : profiles) {
propsData.putProfileProperty(newKey, newValue, p, false);
}
}
}
}
return;
}
boolean append = operator == Operator.QUICK_APPEND;
if (keyProfiles == null) {
propsData.putBaseProperty(key, value, append);
return;
}
for (final String p : keyProfiles) {
propsData.putProfileProperty(key, value, p, append);
}
}
}
