Java tutorial
/* * Copyright 2004-2005 Revolution Systems Inc. * * Licensed 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 com.revolsys.ui.web.config; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import org.apache.commons.jexl.Expression; import org.apache.log4j.Logger; import com.revolsys.util.JexlUtil; import com.revolsys.util.UrlUtil; public class MenuItem implements Cloneable, Comparable { private static final Logger log = Logger.getLogger(MenuItem.class); private String anchor; private Expression condition; private String name; private final Map parameters = new HashMap(); private final Map properties = new HashMap(); private Map staticParameters = new HashMap(); private String title; private Expression titleExpression; private String uri; private Expression uriExpression; public MenuItem() { } public MenuItem(final String title, final String uri) { this(title, title, uri); } public MenuItem(final String name, final String title, final String uri) { this.name = name; setTitle(title); setUri(uri); } public MenuItem(final String name, final String title, final String uri, final String anchor, final String condition) { this(name, title, uri); this.anchor = anchor; setCondition(condition); } public void addParameter(final Parameter parameter) throws Exception { addParameter(parameter.getName(), parameter.getValue()); } public void addParameter(final String name, final Object value) throws Exception { if (value instanceof String) { final String stringValue = (String) value; final Expression expression = JexlUtil.newExpression(stringValue); if (expression != null) { this.parameters.put(name, expression); } else { this.staticParameters.put(name, value); } } else { this.staticParameters.put(name, value); } } public void addProperty(final String name, final String value) { this.properties.put(name, value); } public void addProperty(final WebProperty webProperty) { addProperty(webProperty.getName(), webProperty.getValue()); } @Override public Object clone() { try { return super.clone(); } catch (final CloneNotSupportedException e) { throw new RuntimeException(e.getMessage(), e); } } @Override public int compareTo(final Object o) { if (o instanceof MenuItem) { final MenuItem menuItem = (MenuItem) o; return this.title.compareTo(menuItem.getTitle()); } return 1; } /** * @return Returns the anchor. */ public String getAnchor() { return this.anchor; } /** * @return Returns the condition. */ public Expression getCondition() { return this.condition; } public String getName() { return this.name; } public final Map getParameters() { return this.parameters; } public Map getProperties() { return this.properties; } public String getProperty(final String name) { return (String) this.properties.get(name); } public final Map getStaticParameters() { return this.staticParameters; } public String getTitle() { final WebUiContext context = WebUiContext.get(); if (this.titleExpression != null) { return (String) context.evaluateExpression(this.titleExpression); } else { return this.title; } } public String getUri() { final WebUiContext context = WebUiContext.get(); String uri = this.uri; if (uri != null) { // If this is the first call to getUri update the uri with any static // parameters if (this.staticParameters != null) { uri = UrlUtil.getUrl(uri, this.staticParameters); this.uri = uri; this.staticParameters = null; } } else if (this.uriExpression != null) { uri = (String) context.evaluateExpression(this.uriExpression); if (this.staticParameters != null) { uri = UrlUtil.getUrl(uri, this.staticParameters); } } if (uri != null && this.parameters.size() > 0) { final Map qsParams = new HashMap(); for (final Iterator params = this.parameters.entrySet().iterator(); params.hasNext();) { final Map.Entry param = (Map.Entry) params.next(); final Object key = param.getKey(); final Object value = context.evaluateExpression((Expression) param.getValue()); qsParams.put(key, value); } if (this.anchor == null) { return UrlUtil.getUrl(uri, qsParams); } else { return UrlUtil.getUrl(uri, qsParams) + "#" + this.anchor; } } else { if (this.anchor == null) { return uri; } else { return uri + "#" + this.anchor; } } } public boolean isVisible() { final WebUiContext context = WebUiContext.get(); if (this.condition != null) { return ((Boolean) context.evaluateExpression(this.condition)).booleanValue(); } else { return true; } } /** * @param anchor The anchor to set. */ public void setAnchor(final String anchor) { this.anchor = anchor; } /** * @param condition The condition to set. */ public void setCondition(final String condition) { if (condition != null) { try { this.condition = JexlUtil.newExpression(condition); } catch (final Throwable e) { log.error("Invalid Condition", e); } } else { this.condition = null; } } /** * @param refname */ public void setName(final String name) { this.name = name; } public void setTitle(final String title) { if (title != null) { Expression titleExpression = null; try { titleExpression = JexlUtil.newExpression(title); } catch (final Exception e) { log.error(e.getMessage(), e); } if (titleExpression == null) { this.title = title; this.titleExpression = null; } else { this.title = null; this.titleExpression = titleExpression; } } else { this.title = null; this.titleExpression = null; } } public void setUri(final String uri) { if (uri != null) { Expression uriExpression = null; try { uriExpression = JexlUtil.newExpression(uri.replaceAll(" ", "%20")); } catch (final Exception e) { log.error(e.getMessage(), e); } if (uriExpression == null) { this.uri = uri.replaceAll(" ", "%20"); this.uriExpression = null; } else { this.uri = null; this.uriExpression = uriExpression; } } else { this.uri = null; this.uriExpression = null; } } }