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Diffstat (limited to 'qpid/java/common/src/main/java/org/apache/qpid/configuration/Accessor.java')
| -rw-r--r-- | qpid/java/common/src/main/java/org/apache/qpid/configuration/Accessor.java | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/qpid/java/common/src/main/java/org/apache/qpid/configuration/Accessor.java b/qpid/java/common/src/main/java/org/apache/qpid/configuration/Accessor.java new file mode 100644 index 0000000000..dc5b69dc89 --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/configuration/Accessor.java @@ -0,0 +1,273 @@ +package org.apache.qpid.configuration; +/* + * + * 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. + * + */ + + +import java.io.FileInputStream; +import java.io.FileNotFoundException; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; +import java.util.Map; +import java.util.Properties; + +public interface Accessor +{ + public Boolean getBoolean(String name); + public Integer getInt(String name); + public Long getLong(String name); + public String getString(String name); + + static class SystemPropertyAccessor implements Accessor + { + public Boolean getBoolean(String name) + { + return Boolean.getBoolean(name); + } + + public Integer getInt(String name) + { + return Integer.getInteger(name); + } + + public Long getLong(String name) + { + return Long.getLong(name); + } + + public String getString(String name) + { + return System.getProperty(name); + } + } + + static class MapAccessor implements Accessor + { + protected Map<Object,Object> source; + + public MapAccessor(Map<Object,Object> map) + { + source = map; + } + + public Boolean getBoolean(String name) + { + if (source != null && source.containsKey(name)) + { + if (source.get(name) instanceof Boolean) + { + return (Boolean)source.get(name); + } + else + { + return Boolean.parseBoolean((String)source.get(name)); + } + } + else + { + return null; + } + } + + public Integer getInt(String name) + { + if (source != null && source.containsKey(name)) + { + if (source.get(name) instanceof Integer) + { + return (Integer)source.get(name); + } + else + { + return Integer.parseInt((String)source.get(name)); + } + } + else + { + return null; + } + } + + public Long getLong(String name) + { + if (source != null && source.containsKey(name)) + { + if (source.get(name) instanceof Long) + { + return (Long)source.get(name); + } + else + { + return Long.parseLong((String)source.get(name)); + } + } + else + { + return null; + } + } + + public String getString(String name) + { + if (source != null && source.containsKey(name)) + { + if (source.get(name) instanceof String) + { + return (String)source.get(name); + } + else + { + return String.valueOf(source.get(name)); + } + } + else + { + return null; + } + } + } + + static class PropertyFileAccessor extends MapAccessor + { + public PropertyFileAccessor(String fileName) throws FileNotFoundException, IOException + { + super(null); + Properties props = new Properties(); + FileInputStream inStream = new FileInputStream(fileName); + try + { + props.load(inStream); + } + finally + { + inStream.close(); + } + source = props; + } + } + + static class CombinedAccessor implements Accessor + { + private List<Accessor> accessors; + + public CombinedAccessor(Accessor...accessors) + { + this.accessors = Arrays.asList(accessors); + } + + public Boolean getBoolean(String name) + { + for (Accessor accessor: accessors) + { + if (accessor.getBoolean(name) != null) + { + return accessor.getBoolean(name); + } + } + return null; + } + + public Integer getInt(String name) + { + for (Accessor accessor: accessors) + { + if (accessor.getBoolean(name) != null) + { + return accessor.getInt(name); + } + } + return null; + } + + public Long getLong(String name) + { + for (Accessor accessor: accessors) + { + if (accessor.getBoolean(name) != null) + { + return accessor.getLong(name); + } + } + return null; + } + + public String getString(String name) + { + for (Accessor accessor: accessors) + { + if (accessor.getBoolean(name) != null) + { + return accessor.getString(name); + } + } + return null; + } + } + + static class ValidationAccessor implements Accessor + { + private List<Validator> validators; + private Accessor delegate; + + public ValidationAccessor(Accessor delegate,Validator...validators) + { + this.validators = Arrays.asList(validators); + this.delegate = delegate; + } + + public Boolean getBoolean(String name) + { + // there is nothing to validate in a boolean + return delegate.getBoolean(name); + } + + public Integer getInt(String name) + { + Integer v = delegate.getInt(name); + for (Validator validator: validators) + { + validator.validate(v); + } + return v; + } + + public Long getLong(String name) + { + Long v = delegate.getLong(name); + for (Validator validator: validators) + { + validator.validate(v); + } + return v; + } + + public String getString(String name) + { + String v = delegate.getString(name); + for (Validator validator: validators) + { + validator.validate(v); + } + return v; + } + } +} |