/* Copyright 2013 The jeo project. All rights reserved. * * 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 io.jeo.filter; import java.util.Objects; import java.util.regex.Pattern; import io.jeo.vector.Feature; /** * 'Like' predicate filter. Returns true if the String value of the property * completely matches the specified match expression. A wild card can be * specified using the '%' character. Escaping is not supported and the match * is interpreted as a regular expression. * * @author Ian Schneider <ischneider@boundlessgeo.com> */ public class Like<T> extends Filter<T> { final Property prop; final Expression match; final Pattern pattern; final boolean not; public Like(Property prop, Expression match, boolean not) { Objects.requireNonNull(prop, "property must not be null"); Objects.requireNonNull(match, "match must not be null"); this.prop = prop; this.match = match; String value = (String) match.evaluate(null); // @todo escaping this.pattern = Pattern.compile(value.replace("%", ".*")); this.not = not; } public boolean negated() { return not; } public Property property() { return prop; } public Expression match() { return match; } public Pattern pattern() { return pattern; } @Override public boolean test(T obj) { boolean result = false; if (obj instanceof Feature) { Object val = prop.evaluate((Feature) obj); if (val != null) { result = pattern.matcher(val.toString()).matches(); } } return not != result; } @Override public <R> R accept(FilterVisitor<R> v, Object obj) { return v.visit(this, obj); } @Override public int hashCode() { int hash = 7; hash = 83 * hash + (this.prop != null ? this.prop.hashCode() : 0); hash = 83 * hash + (this.match != null ? this.match.hashCode() : 0); hash = 83 * hash + (this.not ? 1 : 0); return hash; } @Override public boolean equals(Object obj) { if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } final Like<?> other = (Like<?>) obj; if (this.prop != other.prop && (this.prop == null || !this.prop.equals(other.prop))) { return false; } if (this.match != other.match && (this.match == null || !this.match.equals(other.match))) { return false; } if (this.not != other.not) { return false; } return true; } @Override public String toString() { return prop + (not ? "NOT" : "") + " LIKE " + match; } }