org.jboss.dmr.client.ExpressionValue Maven / Gradle / Ivy
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Show all versions of switchyard-console-as7-core
Show all versions of switchyard-console-as7-core
Bundles the core AS7 console as a GWT module. Includes minor customizations to support extensions.
/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.jboss.dmr.client;
import java.io.IOException;
/**
* @author David M. Lloyd
*/
final class ExpressionValue extends ModelValue {
/**
* JSON Key used to identify ExpressionValue.
*/
public static final String TYPE_KEY = "EXPRESSION_VALUE";
private final String expressionString;
ExpressionValue(final String expressionString) {
super(ModelType.EXPRESSION);
if (expressionString == null) {
throw new IllegalArgumentException("expressionString is null");
}
this.expressionString = expressionString;
}
@Override
void writeExternal(final DataOutput out) throws IOException {
out.writeUTF(expressionString);
}
@Override
String asString() {
return expressionString;
}
@Override
void format(final StringBuilder builder, final int indent, final boolean multiLine) {
builder.append("expression ").append(quote(expressionString));
}
@Override
void formatAsJSON(final StringBuilder builder, final int indent, final boolean multiLine) {
builder.append('{');
if(multiLine) {
indent(builder.append('\n'), indent + 1);
} else {
builder.append(' ');
}
builder.append(jsonEscape(TYPE_KEY));
builder.append(" : ");
builder.append(jsonEscape(asString()));
if (multiLine) {
indent(builder.append('\n'), indent);
} else {
builder.append(' ');
}
builder.append('}');
}
@Override
public boolean equals(final Object other) {
return other instanceof ExpressionValue && equals((ExpressionValue)other);
}
public boolean equals(final ExpressionValue other) {
return this == other || other != null && expressionString.equals(other.expressionString);
}
@Override
public int hashCode() {
return expressionString.hashCode();
}
@Override
ModelValue resolve() {
return new StringModelValue(replaceProperties(expressionString));
}
private static final int INITIAL = 0;
private static final int GOT_DOLLAR = 1;
private static final int GOT_OPEN_BRACE = 2;
private static final int RESOLVED = 3;
private static final int DEFAULT = 4;
/**
* Replace properties of the form:
* ${<name>[,<name2>[,<name3>...]][:<default>]}
* @param value
* @return
*/
private static String replaceProperties(final String value) {
final StringBuilder builder = new StringBuilder();
final int len = value.length();
int state = 0;
int start = -1;
int nameStart = -1;
for (int i = 0; i < len; i = value.offsetByCodePoints(i, 1)) {
final char ch = value.charAt(i);
switch (state) {
case INITIAL: {
switch (ch) {
case '$': {
state = GOT_DOLLAR;
continue;
}
default: {
builder.append(ch);
continue;
}
}
// not reachable
}
case GOT_DOLLAR: {
switch (ch) {
case '$': {
builder.append(ch);
state = INITIAL;
continue;
}
case '{': {
start = i + 1;
nameStart = start;
state = GOT_OPEN_BRACE;
continue;
}
default: {
// invalid; emit and resume
builder.append('$').append(ch);
state = INITIAL;
continue;
}
}
// not reachable
}
case GOT_OPEN_BRACE: {
switch (ch) {
case ':':
case '}':
case ',': {
final String name = value.substring(nameStart, i).trim();
if ("/".equals(name)) {
builder.append('/');
state = ch == '}' ? INITIAL : RESOLVED;
continue;
} else if (":".equals(name)) {
builder.append('/');
state = ch == '}' ? INITIAL : RESOLVED;
continue;
}
final String val = null;//System.getProperty(name);
if (val != null) {
builder.append(val);
state = ch == '}' ? INITIAL : RESOLVED;
continue;
} else if (ch == ',') {
nameStart = i + 1;
continue;
} else if (ch == ':') {
start = i + 1;
state = DEFAULT;
continue;
} else {
builder.append(value.substring(start - 2, i + 1));
state = INITIAL;
continue;
}
}
default: {
continue;
}
}
// not reachable
}
case RESOLVED: {
if (ch == '}') {
state = INITIAL;
}
continue;
}
case DEFAULT: {
if (ch == '}') {
state = INITIAL;
builder.append(value.substring(start, i));
}
continue;
}
default: throw new IllegalStateException();
}
}
switch (state) {
case GOT_DOLLAR: {
builder.append('$');
break;
}
case DEFAULT:
case GOT_OPEN_BRACE: {
builder.append(value.substring(start - 2));
break;
}
}
return builder.toString();
}
}